Issue B Original Instruction Manual

LR1-01-880Issue B Original

Instruction Manual

ATEX Category 1 LR1A and LR1BLiquid Ring Vacuum Pumps

This product has been manufactured under a quality system registered to ISO9001

Declaration of Conformity

We, Edwards, Manor Royal, Crawley, West Sussex, RH10 9LW, UK declare under our sole responsibility, as manufacturer and person within the EU authorised to assemble the technical file, that the product(s) Liquid Ring Vacuum Pump Category 1 LR1A200S, LR1A300S, LR1A400S, LR1A500S, LR1A700S, LR1A800S, LR1A1200S, LR1A1300S, LR1A1300S,

LR1A1600S, LR1A2500S, LR1A4000S, LR1A5000S, LR1A5500S, LR1A6500S, LR1A8000S, LR1A100000S, LR1A12000S, LR1A13000S, LR1A16000S, LR1A19000S, LR1A23000S, LR1A26000S LR1B3500S, LR1B4500S, LR1B6000S, LR1B7000S, LR1B8000S, LR1B10000S, LR1B11000S, LR1B12000S, LR1B13000S, LR1B14000S, LR1B15000S, LR1B18000S, LR1B21000, LR1B22000S, LR1B30000S, LR1B38000S

to which this declaration relates is in conformity with the following standards or other normative document(s) EN1012-2:1996, A1: 2009 Compressors and Vacuum Pumps. Safety Requirements, Vacuum Pumps EN61010-1: 2001 Safety Requirements for Electrical Equipment for Measurement,

Control and Laboratory Use, General Requirements EN13463-1: 2009 Non-electrical equipment for use in potentially explosive

atmospheres. Basic method and requirements EN13463-5: 2003 Non-electrical equipment for use in potentially explosive

atmospheres. Protection by constructional safety ‘c’ EN60204-1: 2006 Safety of machinery. Electrical equipment of machines. + A1: 2009 General Requirements EN292-1 & 2:1991 Safety of machinery. Basic concepts, general principals for Design. Basic terminology, methodology EN60079-1 : 2007 Explosive Atmospheres. Equipment protection by flameproof Enclosures ’d’ EN60079-0: 2009 Electrical Apparatus for Potentially Explosive Atmospheres. General requirements. EN12874:2001 Flame Arrestors - Performance Requirements, Test Methods and Limits of use.

and fulfils all the relevant provisions of

2006/42/EC Machinery Directive 2006/95/EC Low Voltage Directive 2004/108/EC Electromagnetic Compatibility (EMC) Directive 2002/96/EC Waste from Electrical and Electronic Equipment (WEEE) Directive 2002/95/EC Restriction of Certain Hazardous Substances (RoHS) Directive 94/9/EC ATEX Directive on use in Potentially Explosive Atmospheres 97/23/EC Pressure Equipment Directive

II 1Gc IIC T4 Internal

II 2Gc IIC T4 External

i.e. The product(s) contain less than - 0.1wt% for hexavalent chromium, lead, mercury, PBB and PBDE; 0.01wt% for cadmium - in homogeneous materials (subject to the exemptions allowed by the Directive). This information relates only to products sold on or after the date of this certificate. Edwards has taken all reasonable steps to confirm this statement, which is based mainly on information from our suppliers. Whilst the RoHS Directive does not legally apply to this vacuum equipment, we recognize that component compliance is relevant to many of our customers. 6th September, 2010

P Shechter, Technical Manager

P200

-05-

600

Issu

e A

© Edwards Limited 2010. All rights reserved. Page iEdwards and the Edwards logo are trademarks of Edwards Limited.

ContentsLR1-01-880 Issue B

Contents

Section Page

1 Introduction ........................................................................................ 1

1.1 Scope and definitions .................................................................................................... 11.2 The LR1A and LR1B pumps .............................................................................................. 21.3 ATEX Directive: 94/9/EC (Europe) ..................................................................................... 21.3.1 Introduction ............................................................................................................... 21.3.2 Temperature classification.............................................................................................. 31.3.3 Normal operation ......................................................................................................... 41.3.4 Abnormal operation ...................................................................................................... 51.4 Applications ............................................................................................................... 5

2 Technical data ..................................................................................... 7

2.1 Operating and storage conditions...................................................................................... 72.2 Mechanical data .......................................................................................................... 72.3 Performance............................................................................................................... 82.4 Noise and vibration data ...............................................................................................112.5 Sealing liquid and seals flush liquid supplies ........................................................................132.5.1 General requirements...................................................................................................132.5.2 Use of water based sealing liquid/seals flush liquid ...............................................................132.6 Materials of construction ...............................................................................................152.7 Item Numbers ............................................................................................................15

3 Installation ....................................................................................... 17

3.1 ATEX installation requirements .......................................................................................173.2 Safety......................................................................................................................203.3 Use of flammable sealing/seals flush liquids........................................................................203.4 Pumping system design .................................................................................................203.4.1 General....................................................................................................................203.4.2 Oxygen monitoring ......................................................................................................213.5 Sealing liquid and seals flush supply system design................................................................213.5.1 Introduction ..............................................................................................................213.5.2 Total recirculation sealing liquid and seals flush supply system .................................................223.5.3 Partial recirculation sealing liquid and seals flush supply system ...............................................223.5.4 Once-through sealing liquid and seals flush supply system .......................................................233.6 Unpack and inspect .....................................................................................................263.7 Locate the pump.........................................................................................................263.8 Fit the motor or drive/transmission ..................................................................................263.8.1 Introduction ..............................................................................................................263.8.2 Fit a motor................................................................................................................263.8.3 Fit a drive and transmission............................................................................................273.9 Connect the pump to earth (ground) .................................................................................273.10 Connect the sealing liquid and seals flush pipelines ...............................................................273.11 Connect the pump inlet and outlet ...................................................................................283.11.1 Introduction ..............................................................................................................283.11.2 Connect the suction inlet ..............................................................................................283.11.3 Connect the discharge outlet..........................................................................................283.12 Fit and connect the temperature transmitter ......................................................................293.13 Activate the automatic lubricators ...................................................................................293.14 Connect the electrical supply to the motor (if necessary)........................................................293.15 Check the direction of pump rotation................................................................................303.16 Check the leak tightness of the system ..............................................................................313.16.1 General requirements...................................................................................................313.16.2 Use of flammable sealing/seals flush liquids........................................................................31

dcs/

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Page ii © Edwards Limited 2010. All rights reserved.Edwards and the Edwards logo are trademarks of Edwards Limited.

Contents

4 Operation ......................................................................................... 33

4.1 General operation safety...............................................................................................334.2 Start-up ...................................................................................................................334.3 Cavitation and hammer.................................................................................................344.4 Shut-down ................................................................................................................35

5 Maintenance...................................................................................... 37

5.1 Safety information.......................................................................................................375.2 Maintenance plan........................................................................................................375.3 Inspect the pipelines and connections ...............................................................................385.4 Check the ATEX safety devices for correct operation .............................................................395.5 Replace the automatic lubricators....................................................................................395.6 Calibrate the ATEX safety devices ....................................................................................405.7 Overhaul the pump......................................................................................................405.8 Fault finding..............................................................................................................40

6 Storage and disposal ............................................................................ 43

6.1 Storage ....................................................................................................................436.1.1 Preparation ...............................................................................................................436.1.2 Short-term storage ......................................................................................................436.1.3 Long-term storage .......................................................................................................446.2 Disposal ...................................................................................................................45

7 Service and spares............................................................................... 47

7.1 Introduction ..............................................................................................................477.2 Service ....................................................................................................................477.3 Spares .....................................................................................................................47

8 ATEX safety control circuit .................................................................... 49

8.1 Introduction ..............................................................................................................498.2 Safety critical components.............................................................................................498.3 Manual reset..............................................................................................................49

For return of equipment, complete the HS Forms at the end of this manual.

Illustrations

Figure Page1 Recommended sealing liquid and seals flush supply system configurations....................................242 ATEX safety control circuit.............................................................................................50

© Edwards Limited 2010. All rights reserved. Page iiiEdwards and the Edwards logo are trademarks of Edwards Limited.

ContentsLR1-01-880 Issue B

Tables

Table Page1 Temperature rises in seals flush liquids............................................................................... 32 Maximum particle sizes .................................................................................................. 43 Operating and storage conditions...................................................................................... 74 Mechanical data .......................................................................................................... 75 General performance data .............................................................................................. 86 Typical performance data/sealing liquid flow rates: LR1A pumps, 50 Hz operation .......................... 97 Typical performance data/sealing liquid flow rates: LR1A pumps, 60 Hz operation .........................108 Typical performance data/sealing liquid flow rates: LR1B pumps, 50 Hz operation .........................119 Noise and vibration data ...............................................................................................1110 Sealing/seals flush liquid supply data ................................................................................1311 Total nominal seals flush liquid flow rate (to both seals).........................................................1412 Materials of construction ...............................................................................................1513 Maximum radial shaft loads ............................................................................................1814 Maximum inlet/outlet connection loading forces and moments .................................................1915 Maintenance plan........................................................................................................3816 Fault finding..............................................................................................................4117 ATEX safety control circuit safety critical components ...........................................................49

Associated publications

Publication title Publication numberVacuum pump and vacuum system safety P300-20-000

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LR1-01-880 Issue B

Page iv © Edwards Limited 2010. All rights reserved.Edwards and the Edwards logo are trademarks of Edwards Limited.

© Edwards Limited 2010. All rights reserved. Page 1Edwards and the Edwards logo are trademarks of Edwards Limited.

IntroductionLR1-01-880 Issue B

1 Introduction1.1 Scope and definitions

This manual provides installation, operation and maintenance instructions for the Edwards ATEX Category 1 LR1A and LR1B Liquid Ring Vacuum Pumps (abbreviated to ‘liquid ring pump(s)’ or ‘pump(s)’ in the remainder of this manual). You must use your pump as specified in this manual.

Read this manual before you install and operate your pump. Important safety information is highlighted as WARNING and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is defined below.

CAUTIONCautions are given where failure to observe the instruction could result in damage to the equipment, associated equipment and process.

The following warning symbols are on the pump:

The units used throughout this manual conform to the SI international system of units of measurement.

The pump identification and rating plate (refer to the System Manual) provides specific details about the pump, including: pump type; part number and serial number; and so on.

WARNING

Warnings are given where failure to observe the instruction could result in injury or death to people.

Warning – refer to accompanying documentation.

Protective earth (ground).

Ear defenders must be worn.*

* Only fitted to pumps which generate noise levels (at 1 metre) > 85 dB(A): see Section 2.4.

LR1-01-880 Issue B

Page 2 © Edwards Limited 2010. All rights reserved.Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

1.2 The LR1A and LR1B pumps

The LR1A and LR1B pumps have been specifically developed to meet the requirement for pumps capable of pumping a flammable atmosphere with an internal area classification of Zone 0, without the need for protective devices such as flame arrestors.

The pumps have been certified by a Notified body (according to 94/9/EC) as Category 1 equipment under the ATEX Directive; for this certification to be valid, the pumps must be installed exactly as specified in this manual.

The pumps have been designed using the principle of constructional safety, which ensures that potential ignition sources are eliminated, even in the unlikely event that a rare malfunction occurs.

The pumps are suitable for pumping a wide range of flammable and non-flammable gases and vapours, subject to the restrictions specified in Section 1.3.4.

1.3 ATEX Directive: 94/9/EC (Europe)

1.3.1 Introduction

The pump must be incorporated into a larger system on which the internal atmosphere has an area classification of Zone 0. Such systems will be certified in accordance with the above Directive, and must be identified by an ATEX system rating label.

For certification to be valid, the pump must be installed exactly as specified in this manual.

The pump is fitted with an ATEX rating label which contains the following information:

The notations used in these ratings are as follows:

II 1 G c, IIC T4 InternalII 2 G c, IIC T4 External

specifies that the pump can be used in a potentially explosive atmosphere.

II Equipment group II (non-mining)

1 Equipment category 1

2 Equipment category 2

G Suitable for potentially explosive gas atmospheres

c Complies with ‘constructional safety’ protection strategy

IIC Suitable to pump gas group IIC

T4 Gas auto-ignition temperature: see Section 1.3.2.



1.3.2 Temperature classification

The temperature classification applied to the pump relates to the auto-ignition temperature of flammable materials that can be pumped.

The pump has a T4 classification and is suitable for pumping flammable materials that have an auto-ignition temperature greater than 135 °C. Refer to Section 2 of this manual for the necessary pump operating conditions.

The T4 temperature classification is achieved by limiting the temperature of the sealing liquid ring and of the seals flush liquid (supplied to each of the mechanical seals) to 80 °C. The maximum temperature rise which can occur in the seals flush liquid is 30 °C (assuming that a non-flashing hydrocarbon liquid is used: see Table 1). Therefore, the maximum external temperature of the seals is 110 °C, which is within the T4 classification requirements.

In certain applications it is necessary to limit the service liquid flow rate to 50% of the normal flow rate given in Section 2.3, Table 6. When the pumps are configured in this way the temperature rise of the seal liquid will be approximately 10 °C (normally 5 °C). The maximum service liquid temperature into the pump is set at 80 °C. The outlet temperature would then be 90 °C and taking the maximum rise across the seal faces of 30 °C gives a maximum internal temperature of 120 °C which satisfies the T4 ATEX temperature classification.

The maximum operating temperature of the pump is determined by:

The temperature of the sealing liquid supply.

The temperature rise of the sealing liquid in the pump, due to power absorbed by the liquid ring to effect gas compression.

The temperature rise of the sealing liquid in the pump, due to the condensation of vapours which enter the pump.

The temperature rise in the seals flush liquid to the mechanical seals, due to friction between the stationary and rotary parts of the seals.

If you use a total recirculation sealing liquid supply system (see Section 3.5), your cooler must be suitable for the temperature rises that will occur.

Conservative estimates of the temperature rise for different seals flush liquids are shown in Table 1 (see below). Note that mineral oil is included in Table 1 for comparison purposes only; you cannot use mineral oil as the seals flush liquid, due to the resulting high temperature rise.

The liquid ring pumps are virtually isothermal machines and, for applications that use water as the sealing liquid, the temperature rise across the pump is approximately 5 °C. The temperature rise is directly proportional to the specific heat of the sealing liquid; for a liquid which has a specific heat which is half that of water, the temperature rise will be approximately 10 °C.

With the T4 temperature classification, limiting the sealing liquid ring to a maximum temperature of 80 °C and limiting the temperature of the gas at the pump inlet to 80 °C allows for a temperature rise of 55 °C in the sealing liquid; this will never occur, provided that the sealing liquid supply is maintained.

Table 1 - Temperature rises in seals flush liquids

Liquid Maximum temperature rise*

* At maximum rotation speed: see Table 5.

Water/flashing hydrocarbons 20 °C

Non-flashing hydrocarbons 30 °C

Mineral oil†

† You cannot use mineral oil as seals flush liquid!

70 °C

LR1-01-880 Issue B


Introduction

You must ensure that the seals flush supplies cannot be interrupted during pump operation; fit suitable devices to monitor the supplies, and to shut down the pump when a supply fails (refer to Section 3.5):

Fit flow switches in the seals flush pipelines of all systems.

If you use the sealing liquid reservoir to provide the seals flush supplies, fit a level switch to the reservoir.

If you do not use a sealing liquid reservoir to provide the seals flush supplies, fit a pressure switch in the seals flush supply pipeline.

1.3.3 Normal operation

The ATEX Category 1 liquid ring pump relies on the pump’s constructional safety for the safe pumping of flammable materials. In normal operation, as defined by this manual, the pump is safe for the pumping of flammable materials where there is no risk that any particles larger than those specified in Table 2 (page 4) could enter the pump at any time, and so cause a potential ignition hazard.

Where there is no such risk, the pump can be used to pump flammable materials from gas group IIC, within the normal parameters as defined in this manual.

The pump can be used with either flammable or non-flammable sealing liquids. Where flammable sealing liquids are used, you must comply with the requirements of Section 3.3.

The seals flush supply must comply with the requirements of Section 2.5.

The materials of construction of the pump are specified in Section 2.6. Before you use the pump, you must ensure that these materials are compatible with the gases and vapours you will pump.

WARNING

The pump relies on the principle of constructional safety to pump flammable gases and vapours safely. To conform with constructional safety requirements, it is your responsibility to ensure that particles larger than those specified in Table 2 cannot enter the pump at any time.

Table 2 - Maximum particle sizes

Pump Maximum size of particles that can be allowed to enter the pump

LR1A200 / 300 / 400 / 500 / 700 23 μm

LR1A800 / 1200 / 1300 / 1600 / 2500 33 μm

LR1A4000 / 5000 90 μm

LR1A5500 / 6500 100 μm

LR1A8000 / 10000 117 μm

LR1A12000 / 13000 133 μm

LR1A16000 / 19000 150 μm

LR1A23000 / 26000 167 μm

LR1B3500 90 μm

LR1B4500 107 μm

LR1B6000 123 μm

LR1B7000 100 μm

LR1B8000 117 μm



1.3.4 Abnormal operation

Pumping gases with temperatures greater than the system temperature classification (see Section 1.3.2).

Pumping hydrocarbon oxides.

Pumping oxidants.

Pumping pyrophoric gases.

Pumping gases that tend to self-decompose, or that are chemically unstable.

Pumping gases that contain particles larger than those specified in Table 2 (page 4).

Use with oxygen enriched atmospheres.

Use of the pump with mineral oil as the seals flush liquid.

Use of the pump with a sealing liquid or seals flush liquid which does not comply with the requirements of Section 2.5.

Pumping of, or use of, the pump in the presence of explosive dust atmospheres.

Use of the pump in ambient conditions other than those specified in Section 3.

1.4 Applications

The pumps are suitable for use in distillation, filtration, evaporation, drying, stripping, solvent recovery and deaeration processes in a wide range of industries and applications.

You must ensure that the pump is suitable for your application.

If you have any doubts as to the suitability of the pump for your application, refer to the Edwards guidelines on vacuum pump and vacuum system safety (see the Associated Publications at the end of the contents list at the front of this manual).

LR1B10000 120 μm

LR1B11000 / 13000 133 μm

LR1B12000 117 μm

LR1B14000 133 μm

LR1B15000 / 18000 150 μm

LR1B21000 150 μm

LR1B22000 / 30000 167 μm

LR1B38000 167 μm

WARNING

Misuse of the pump as described below is strictly prohibited:

Table 2 - Maximum particle sizes (continued)

Pump Maximum size of particles that can be allowed to enter the pump

LR1-01-880 Issue B




Technical dataLR1-01-880 Issue B

2 Technical data2.1 Operating and storage conditions

2.2 Mechanical data

Table 3 - Operating and storage conditions

Item Reference data

Ambient operating temperature range -20 to 40 °C

Ambient storage temperature range -30 to 50 °C

Maximum ambient operating humidity 90%

Maximum operating altitude 1000 m

Maximum inlet gas temperature 80 °C

Table 4 - Mechanical data

Item Reference data

Dimensions Refer to your System Manual

Mass Refer to your System Manual

Process sealing liquid and seals flush connections Refer to your System Manual

IP (ingress protection) rating IP54

Maximum flatness deviation for mounting*

* Refer to Section 3.7.

LR1A200 / 300 / 400 / 500 0.1 mm m-1

LR1A700 / 800 / 1200 / 1300 0.2 mm m-1

LR1A1600 / /2500 0.3 mm m-1

LR1A4000 / 5000 / 5500 / 6500†

† Belt driven.

0.4 mm m-1

LR1A6500‡ / 8000 / 10000

‡ Direct (coupling) driven.

0.5 mm m-1

LR1A12000 / 13000 / 16000 0.6 mm m-1

LR1A19000 / 23000 / 26000 0.7 mm m-1

LR1B7000 0.5 mm m-1

LR1B3500 / 4500 / 6000 / 8000 0.5 mm m-1

LR1B10000 / 11000 / 13000 / 15000 0.6 mm m-1

LR1B12000 0.6 mm m-1

LR1B14000 0.6 mm m-1

LR1B18000 / 22000 / 30000 0.7 mm m-1

LR1B21000 0.7 mm m-1

LR1B38000 0.7 mm m-1

LR1-01-880 Issue B


Technical data

2.3 Performance

Notes: 1. The performance data specified in Tables 6 to 8 applies to pumps used with water as the sealing liquid. Additional performance data may be supplied in your System Manual if you have specifically ordered your pump for use with a different sealing liquid.

2. In Tables 6 to 8, the Performance columns specify the suction capacity (in m3 h-1) and shaft power (in kW) for the specified inlet pressures, with the motor power as specified in Table 5.

Table 5 - General performance data

Maximum suction capacity See Tables 6 to 8

Shaft power See Tables 6 to 8

Maximum speed:r min-1

Maximum motor rating: kW

Maximum back-pressure: bar

LR1A200 2200 11.0 1.1

LR1A300 2200 15.0 1.1

LR1A400 2200 18.5 1.1

LR1A500 1835 22.0 1.1

LR1A700 1835 30.0 1.1

LR1A800 1300 30.0 1.1

LR1A1200 1300 55.0 1.1

LR1A1300 1300 55.0 1.1

LR1A1600 955 75.0 1.1

LR1A2500 955 90.0 1.1

LR1A4000 740 110.0 1.1

LR1A5000 740 132.0 1.1

LR1A5500 670 160.0 1.1

LR1A6500 670 160.0 1.1

LR1A8000 560 200.0 1.1

LR1A10000 560 220.0 1.1

LR1A12000 480 315.0 1.1

LR1A13000 480 315.0 1.1

LR1A16000 400 450.0 1.1

LR1A19000 400 450.0 1.1

LR1A23000 340 560.0 1.1

LR1A26000 340 630.0 1.1

LR1B3500 740 110.0 1.1

LR1B4500 740 132.0 1.1

LR1B6000 670 160.0 1.1

LR1B7000 550 200.0 1.1

LR1B8000 560 200.0 1.1



LR1B10000 560 220.0 1.1

LR1B11000 480 280.0 1.1

LR1B12000 490 300.0 1.1

LR1B13000 480 315.0 1.1

LR1B14000 395 400.0 1.1

LR1B15000 400 355.0 1.1

LR1B18000 400 400.0 1.1

LR1B21000 330 500.0 1.1

LR1B22000 340 560.0 1.1

LR1B30000 340 630.0 1.1

LR1B38000 312 800.0 1.1

Table 6 - Typical performance data/sealing liquid flow rates: LR1A pumps, 50 Hz operation

Pump Speedr min-1

Typical performance Maximum sealingliquid

flow ratem3 h-1

33 mbar3.3 x 103 Pa

100 mbar1.0 x 104 Pa

200 mbar2.0 x 104 Pa

800 mbar8.0 x 104 Pa

m3 h-1 kW m3 h-1 kW m3 h-1 kW m3 h-1 kW

LR1A200 1450 52 2.4 168 3.2 147 3.9 162 3.6 1.3

LR1A300 1450 50 4.0 168 4.9 234 6.0 254 5.0 2.1

LR1A400 1450 166 4.8 266 6.2 314 7.8 362 7.0 2.2

LR1A500 1450 230 8.6 348 8.5 390 11.0 432 10.0 2.9

LR1A700 1450 290 10.5 444 13.2 540 15.9 576 14.0 3.0

LR1A800 980 408 11.4 610 14.5 684 19.0 732 14.7 4.0

LR1A1200 980 614 18.0 910 2.3 1026 27.5 1080 26.0 3.6

LR1A1300 980 804 20.5 972 26.0 1104 31.0 1224 26.5 6.0

LR1A1600 740 750 23.5 1170 30.0 1410 35.5 1500 29.5 6.0

820 870 31.5 1320 38.0 1530 43.5 1675 38.0 6.6

LR1A2500 740 1320 31.5 1820 43.0 2120 52.5 2320 47.0 6.3

920 2040 56.0 2490 70.0 2700 83.0 2860 74.0 7.8

LR1A4000 740 2800 70.0 3400 84.0 3680 96.0 3840 87.0 10.0

LR1A5500 660 3780 113.0 4920 138.0 5430 150.0 5740 138.0 14.5

LR1A8000 490 3480 114.0 6300 142.0 6960 165.0 7070 145.0 20.0

LR1A12000 472 7600 210.0 10150 265.0 11100 300.0 11850 277.0 22.6

LR1A16000 398 10100 295.0 13200 360.0 15200 405.0 15600 385.0 31.7

LR1A23000 330 11970 398.0 17970 475.0 20945 540.0 21090 505.0 42.8

Table 5 - General performance data (continued)

Maximum suction capacity See Tables 6 to 8

Shaft power See Tables 6 to 8

Maximum speed:r min-1

Maximum motor rating: kW

Maximum back-pressure: bar

LR1-01-880 Issue B


Technical data

Pump Speedr min-1


flow ratem3 h-1

200 mbar2.0 x 104 Pa

300 mbar3.0 x 104 Pa

400 mbar4.0 x 104 Pa

600 mbar6.0 x 104 Pa


LR1A5000 740 3730 101.0 4200 103.0 4480 103.0 4640 94.0 9.2

LR1A6500 660 5460 153.0 6300 156.0 6760 155.0 7000 136.0 14.0

590 5130 123.0 5730 129.0 6000 126.0 6240 108.0 12.5

LR1A10000 490 7520 192.0 8420 196.0 8780 193.0 8900 173.0 17.5

LR1A13000 420 4780 247.0 11040 250.0 11700 247.0 12000 224.0 24.1

LR1A19000 398 15300 417.0 17000 425.0 18000 423.0 19000 390.0 38.0

LR1A26000 330 21900 550.0 24060 575.0 25140 570.0 26400 525.0 52.0

Table 7 - Typical performance data/sealing liquid flow rates: LR1A pumps, 60 Hz operation

Pump Speedr min-1


flow ratem3 h-1

33 mbar3.3 x 103 Pa

100 mbar1.0 x 104 Pa

200 mbar2.0 x 104 Pa

800 mbar8.0 x 104 Pa


LR1A200 1450 62 3.3 202 4.4 176 5.3 194 4.9 1.6

LR1A300 1450 60 5.5 202 6.7 281 8.2 305 6.8 2.5

LR1A400 1450 199 6.6 319 8.5 377 10.7 434 9.6 2.6

LR1A500 1450 276 11.8 418 11.6 468 15.1 518 13.7 3.5

LR1A700 1450 348 14.4 533 18.1 648 21.8 691 19.2 3.6

LR1A800 980 490 15.6 732 19.8 821 26.0 878 20.1 4.8

LR1A1200 980 737 24.6 1092 31.5 1231 37.6 1296 35.6 4.3

LR1A1300 980 965 28.0 1166 35.6 1325 42.4 1469 36.3 7.2

LR1A1600 740 900 32.1 1404 41.0 1692 48.6 1800 40.4 7.2

820 1044 43.1 1584 52.0 1836 59.5 2010 52.0 7.9

LR1A2500 740 1584 43.1 2184 58.8 2544 71.8 2784 64.3 7.6

920 2448 76.6 2988 95.8 3240 113.6 3432 101.2 9.4

LR1A4000 740 3360 95.8 4080 114.9 4416 131.3 4608 119.0 12.0

LR1A5500 660 4536 154.6 5904 188.8 6516 205.2 6888 188.8 17.4

LR1A8000 490 4176 156.0 7560 194.3 8352 225.8 8484 198.4 24.0

LR1A12000 472 9120 287.3 12180 362.6 13320 410.5 14220 379.0 27.1

LR1A16000 398 12120 403.6 15840 492.6 18240 554.2 18720 526.8 38.0

LR1A23000 330 14364 544.6 21564 649.9 25134 738.9 25308 691.0 51.4

Table 6 - Typical performance data/sealing liquid flow rates: LR1A pumps, 50 Hz operation (continued)



2.4 Noise and vibration data

Pump Speedr min-1


flow ratem3 h-1

200 mbar2.0 x 104 Pa

300 mbar3.0 x 104 Pa

400 mbar4.0 x 104 Pa

600 mbar6.0 x 104 Pa


LR1A5000 740 4476 138.2 5040 140.9 5376 140.9 5568 128.6 11.0

LR1A6500 660 6552 209.3 7560 213.4 8112 212.1 8400 186.1 16.8

590 6156 168.3 6876 176.5 7200 172.4 7488 147.8 15.0

LR1A10000 490 9024 262.7 10104 268.2 10536 264.1 10680 236.7 21.0

LR1A13000 420 5736 338.0 13248 342.1 14040 337.9 14400 306.5 28.9

LR1A19000 398 18360 570.6 20400 581.5 21600 578.8 22800 533.6 45.6

LR1A26000 330 26280 752.6 28872 786.8 30168 780.0 31680 718.3 62.4

Table 8 - Typical performance data/sealing liquid flow rates: LR1B pumps, 50 Hz operation

Pump Speedr min-1


flow ratem3 h-1

200 mbar2.0 x 104 Pa

400 mbar4.0 x 104 Pa

600 mbar6.0 x 104 Pa

800 mbar8.0 x 104 Pa


LR1B3500 472 1800 45.5 2400 46.5 2520 37.5 2700 27.0 5.5

LR1B4500 520 3000 67.0 3420 67.5 3600 59.0 4200 51.5 10.0

LR1B6000 440 4620 91.0 4920 92.5 5100 83.0 5700 72.0 11.0

LR1B7000 550 7920 166.0 8340 170.0 8580 165.0 8580 139.0 14.8

LR1B8000 372 5700 99.0 6000 102.0 5880 88.0 5890 70.0 12.0

LR1B10000 330 6180 110.0 6900 108.0 7320 95.0 7440 77.0 14.0

LR1B11000 340 9300 175.0 10200 170.0 10380 139.0 10440 112.0 18.4

LR1B12000 490 13680 257.0 13820 262.0 13800 222.0 13520 187.0 24.8

LR1B13000 340 10800 205.0 11760 195.0 12000 168.0 12300 137.0 18.5

LR1B14000 395 15840 345.0 16680 357.0 17040 320.0 17040 290.0 24.3

LR1B15000 266 12120 215.0 13440 205.0 13620 175.0 13560 140.0 25.0

LR1B18000 298 14700 305.0 16500 308.0 17040 270.0 17280 225.0 31.9

LR1B21000 330 21900 458.0 22720 470.0 22740 420.0 22740 370.0 22.5

LR1B22000 236 17700 325.0 19500 325.0 20280 280.0 20700 225.0 37.3

LR1B30000 298 26700 545.0 28800 676.0 29520 525.0 29880 455.0 54.7

LR1B38000 312 34800 750.0 36480 770.0 37200 696.0 37200 630.0 57.2

Table 9 - Noise and vibration data

Pump Noise level (dB(A))at 1 metre*

Vibration level(mm s-1)†

LR1A200 85 2.8

LR1A300 85 2.8

LR1A400 85 2.8

Table 7 - Typical performance data/sealing liquid flow rates: LR1A pumps, 60 Hz operation (continued)

LR1-01-880 Issue B


Technical data

LR1A500 85 2.8

LR1A700 85 2.8

LR1A800 85 2.8

LR1A1200 85 2.8

LR1A1300 85 2.8

LR1A1600 85 2.8

LR1A2500 85 2.8

LR1A4000 85 2.8

LR1A5000 85 2.8

LR1A5500 85 2.8

LR1A6500 85 2.8

LR1A8000 85 2.8

LR1A10000 85 2.8

LR1A12000 85 2.8

LR1A13000 85 2.8

LR1A16000 85 2.8

LR1A19000 85 2.8

LR1A23000 85 2.8

LR1A26000 85 2.8

LR1B3500 85 2.8

LR1B4500 85 2.8

LR1B6000 85 2.8

LR1B7000 85 2.8

LR1B8000 85 2.8

LR1B10000 85 2.8

LR1B11000 85 2.8

LR1B12000 85 2.8

LR1B13000 85 2.8

LR1B14000 85 2.8

LR1B15000 85 2.8

LR1B18000 85 2.8

LR1B21000 85 2.8

LR1B22000 85 2.8

LR1B30000 85 2.8

LR1B38000 85 2.8* In free hemispherical field, pipe noise excluded. Ear protection must be worn for noise levels higher than

85 dB(A).† These are the maximum vibration levels (including vibration induced by any other components in your

installation) to which the pump can be subjected.

Table 9 - Noise and vibration data (continued)

Pump Noise level (dB(A))at 1 metre*

Vibration level(mm s-1)†



2.5 Sealing liquid and seals flush liquid supplies

2.5.1 General requirements

Your sealing liquid and seals flush liquid supplies must meet the following requirements:

If the sealing liquid is not the same as the seals flush liquid, the two liquids must be compatible.

The liquid(s) must be compatible with the process gases and vapours pumped, and with the materials of construction of the pump (see Section 2.6).

The liquid(s) must not contain any particles larger than those specified in Table 2 (page 4).

The pressure of the sealing and seals flush liquid supplies must be adequate to overcome pressure losses through the supply pipelines. The pressure of each supply (at the corresponding inlet port on the pump) must be > 0.05 bar (5 x 103 Pa) above the outlet pressure.

When the vapour pressure of the sealing liquid is close to the pump suction pressure, the liquid sealing ring can start to boil and this may result in cavitation. (Cavitation occurs when vapour bubbles formed at the suction inlet are transferred to the discharge outlet, where the bubbles collapse under pressure with potentially destructive force.)

You should therefore ensure that the temperature of the sealing liquid supply is as low as possible. If the temperature of the process gas is > 70 °C, you may need to increase the sealing liquid flow rate specified in Table 10 (see page 13) by up to 50%.

2.5.2 Use of water based sealing liquid/seals flush liquid

If you use a water based sealing liquid or seals flush liquid, where ambient temperatures can fall close to 0 °C or below, take appropriate precautions to ensure that the liquid does not freeze and damage the pump.

Such precautions may include the addition of ethylene glycol anti-freeze to the liquid, in concentrations to suit the climatic conditions. You must not use other types of anti-freeze.

WARNING

The sealing liquid and seals flush liquid must comply with the requirements specified below. If they do not, the ATEX certification of the pump and of your system will be invalid, and there may be a risk of fire or explosion when you operate the pump.

Table 10 - Sealing/seals flush liquid supply data

Item Reference data

Sealing/seals flush liquids pressure > outlet pressure + 0.05 bar, 5 x 103 Pa

Sealing/seals flush liquids auto-ignition temperature > 135 °C

Sealing liquid

Maximum viscosity*

* Contact your supplier or Edwards if you want to use a sealing liquid with higher density/viscosity.

1 x 10-5 m2 s-1

Maximum density* 1200 kg m-3

Maximum flow rate See Tables 6 to 8

Maximum temperature 80 °C

LR1-01-880 Issue B


Technical data

Table 11 - Total nominal seals flush liquid flow rate (to both seals)

Pump Flow rate (l min-1)

LR1A200 10

LR1A300 10

LR1A400 10

LR1A500 10

LR1A700 10

LR1A800 15

LR1A1200 15

LR1A1300 15

LR1A1600 15

LR1A2500 20

LR1A4000 20

LR1A5000 20

LR1A5500 20

LR1A6500 25

LR1A8000 25

LR1A10000 25

LR1A12000 25

LR1A13000 30

LR1A16000 30

LR1A19000 30

LR1A23000 30

LR1A26000 30

LR1B7000 25

LR1B12000 30

LR1B14000 30

LR1B21000 30

LR1B38000 35



2.6 Materials of construction

2.7 Item Numbers

The Item Number of a pump depends on the pump model and size, the materials of construction, and so on. Refer to the System Manual for the Item Number of your pump.

Table 12 - Materials of construction

LR1A200, LR1A300, LR1A400, LR1A500, LR1A700, LR1A800,LR1A1200, LR1A1300, LR1A1600, LR1A2500 pumps

Component Standard Stainless steel

Casing ASTM A36 steel AISI 316 stainless steel

Impeller ASTM A 536-84 Grade 64-45-12 steel ACI CF-8M

End plates ASTM A48 Class 30B cast iron ACI CF-8M

Port plates ASTM A48 Class 30B cast iron ACI CF-8M

LR1A4000, LR1A5000, LR1A5500 pumps



Impeller ASTM A 536-84 Grade 64-45-12 steel ACI CF-8M



LR1A6500, LR1A8000, LR1A10000, LR1A12000, LR1A13000, LR1A16000,LR1A19000, LR1A23000, LR1A26000 pumps



Impeller ASTM A 536-84 Grade 64-45-12 steel*

A26 steel†

* LR1A6500 to 8000† LR1A10000 to 26000

ACI CF-8M



LR1B pumps



Impeller ASTM A 536-84 Grade 310-12 steel‡

ASTM A36 steel**

‡ LR1B3500 to 10000** LR1B11000 to 38000

ACI CF-8M


Port plates ASTM A36 steel ACI CF-8M

LR1-01-880 Issue B




InstallationLR1-01-880 Issue B

3 Installation

CAUTIONEdwards will accept no liability or warranty claims if your installation includes any modifications or additions to the pump without the prior written approval of Edwards, or if the pump is incorrectly installed.

3.1 ATEX installation requirements

The pump must be installed in accordance with the installation requirements set out in this manual; in addition, a notified body mandated under the ATEX 94/9/EC directive must then approve the complete installation prior to use. This is essential for the Category 1 certification to be valid.

Requirements:

The pump is supplied as a bare shaft pump. To operate the pump, you must fit an ATEX compliant motor, or connect the pump to a drive with the characteristics set out in Tables 6 to 8. You must use a suitable transmission system between the drive and the pump, to ensure that radial loading on the pump input shaft is kept to a minimum. The loadings must be less than the maximum radial loadings given in Table 13 (page 18). The transmission system can take the form of a coupling or a belt drive, but must comply with the requirements of the ATEX Directive (94/9/EC) in order for the external ATEX certification to apply.

If a sealing liquid and seals flush supply system is not already fitted, you must install the pump in one of the system configurations specified in Section 3.5.

Your vacuum system design must ensure that the inlet of the pump is protected from the ingress of particles larger than those specified in Table 2 (page 4). Unless your design ensures that such particle ingress cannot occur, use upstream filters.

You must fit a flow switch in each of the seals flush supply pipelines. If the seals flush supplies are provided from a sealing liquid reservoir, you must fit a level switch in the reservoir. If the seals flush supplies are not provided from a sealing liquid reservoir, you must fit a pressure switch in the seals flush supply pipeline. All of the switches must be high integrity devices and must be ‘fail to safety’ in accordance with Annex II Section 1.5 of Directive 94/9/EC. You must connect the switches to the ATEX safety control circuit defined in Figure 2; this circuit will stop the pump in the event of seals flush liquid supply failure.

The pump must be fitted with a temperature transmitter that measures the sealing liquid temperature. This transmitter must be used to switch off the pump in the event that the sealing liquid temperature exceeds 80 °C. You must connect the temperature transmitter to the ATEX safety control circuit defined in Figure 2; this circuit will stop the pump in the event of high sealing liquid temperature. Note also that:

The temperature transmitter must be a high integrity device and must ‘fail to safety’ in accordance with Annex II Section 1.5 of Directive 94/9/EC.

The accuracy of the temperature transmitter must be ± 1.5 °C, or ± 0.4% of the measured temperature, whichever is the greater.

The maximum loads and moments imposed by your system pipelines on the inlet and outlet connections must not exceed those specified in Table 13 (page 18).

The pumps are fitted with earth (ground) studs. You must use these studs to connect the pump to a suitable earth (ground) to prevent a potential ignition source: refer to Section 3.9.

WARNING

The pump must be installed in accordance with the requirements detailed in this section.

LR1-01-880 Issue B


Installation

Table 13 - Maximum radial shaft loads

Pump Drive shaft diameter (mm) Maximum radial shaft load (N)

LR1A200 35 1016

LR1A300 35 1488

LR1A400 35 1987

LR1A500 35 2014

LR1A700 35 2871

LR1A800 50 3841

LR1A1200 50 5700

LR1A1300 50 6263

LR1A1600 70 7390

LR1A2500 70 10628

LR1A4000 100 15519

LR1A5000 100 17375

LR1A5500 120 22212

LR1A6500 120 25173

LR1A8000 140 31272

LR1A10000 140 34939

LR1A12000 160 43863

LR1A13000 160 49215

LR1A16000 180 62262

LR1A19000 180 69042

LR1A23000 200 87277

LR1A26000 200 101589

LR1B3500 100 15723

LR1B4500 100 20923

LR1B6000 120 29436

LR1B7000 120 30715

LR1B8000 140 31507

LR1B10000 140 43916

LR1B11000 160 51990

LR1B12000 140 43512

LR1B13000 160 61467

LR1B14000 160 61947

LR1B15000 180 72613

LR1B18000 180 85339

LR1B21000 180 86114

LR1B22000 200 107466

LR1B30000 200 124292

LR1B38000 200 123751



Table 14 - Maximum inlet/outlet connection loading forces and moments

PumpMaximum external forces (N)on inlet/outlet connections*

* Fx, Fy and Fz are the forces in each of the x, y and z directions (see below) and F is thetotal resultant force.

Maximum external moments (N m)on inlet/outlet connections†

† Mx, My and Mz are the moments in each of the x, y and z directions (see below) and M is thetotal resultant moment.

x Is the horizontal direction, parallel to the drive shaft.y Is the horizontal direction, at 90° to the x directionz Is the vertical direction (from the base of the pump upwards).

Fx Fy Fz F Mx My Mz M

LR1A200LR1A300LR1A400LR1A500LR1A700LR1A800

LR1A1200LR1A1300LR1A1600LR1A2500LR1A4000LR1A5000LR1A5500LR1A6500LR1A8000

LR1A10000LR1A12000LR1A13000LR1A16000LR1A19000LR1A23000LR1A26000

150019501950300030003750

375037504500450060006000745074508950

8950104501045011950119501495014950

130017501750270027003350

335033504050405054005400675067508050

80509400940010750107501345013450

165021502150335033504150

4150415050005000670067008350835010000

10000116501165013300133001660016600

260034003400525052506500

65006500785078501045010450130501305015650

15650182501825020850208502605026050

140015001500175017502100

210021002500250032503250445044506050

605077507750970097001445014450

100011001100125012501500

150015001750175023002300315031504300

430055005500690069001025010250

115012501250145014501750

175017502050205026502650365036504950

495063506350795079501180011800

205022502250260026003100

310031003650365048004800655065508900

8900114001140014300143002130021300

LR1B3500LR1B4500LR1B6000LR1B7000LR1B8000

LR1B10000LR1B11000LR1B12000LR1B13000LR1B14000LR1B15000LR1B18000LR1B21000LR1B22000LR1B30000LR1B38000

60006000745089508950

895010450104501045011950119501195013450149501495014950

54005400675080508050

805094009400940010750107501075012100134501345013450

6700670083501000010000

1000011650116501165013300133001330014950166001660016600

1045010450130501565015650

1565018250182501825020850208502085023450260502605026050

32503250445060506050

605077507750775097009700970011950144501445014450

23002300315043004300

43005500550055006900690069008450102501025010250

26502650365049504950

49506350635063507950795079509750118001180011800

48004800655089008900

890011400114001140014300143001430017550213002130021300

LR1-01-880 Issue B


Installation

3.2 Safety

A suitably trained and supervised technician must install the pump.

Wear the appropriate safety-clothing when you come into contact with contaminated components.

If your pumping system has already been used, vent and purge it before you start installation work.

Ensure that the installation technician is familiar with the safety procedures which relate to the sealing/seals flush liquid(s) and to the products handled by the pumping system.

Disconnect the other components in the pumping system from the electrical supply/drive system so that they cannot be operated accidentally.

3.3 Use of flammable sealing/seals flush liquids

If you use a flammable sealing liquid in the pump, the atmosphere inside the pump will become saturated with a flammable vapour.

If oxygen or air is introduced into the pump, it is possible for the internal atmosphere to become potentially explosive, independently of the flammability of the pumped process gases/vapours. This could cause the flammable zone inside the pump to be different from the flammable zone in the process pipelines.

To ensure that the flammable zone inside the pump is not changed, you must:

Ensure that the system is leak tight: refer to Section 3.16.

After each process pumping cycle, use an inert gas purge to vent the system to atmospheric pressure. This will ensure that when the next evacuation cycle is started, the oxygen concentration is less than 2.5%.

3.4 Pumping system design

3.4.1 General

The gases to be pumped must not contain particles larger than those specified in Table 2 (page 4). If necessary, incorporate an inlet filter in the inlet pipeline to the pump, to prevent the ingress of solids into the pump.

Make sure that the discharge outlet pipeline cannot become blocked. If you have an outlet-isolation valve, make sure that you cannot operate the pump with the valve closed.

WARNING

If you use a water-based sealing liquid, harmful bacteria (such as Legionella) could propagate inside the pump and sealing liquid supply system. Take suitable precautions to inhibit bacterial growth, and to ensure that untreated bacteria-bearing mist is not discharged from the system.

WARNING

Obey the safety instructions listed below and take note of appropriate precautions when you install the pump.

WARNING

Obey the safety instructions listed below and take note of appropriate precautions when you install the pump.



Install a non-return valve in the inlet pipeline, to prevent the suck-back of sealing liquid into your system when the pump is switched off.

Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to safe concentrations.

Design your pumping system such that, if it is shut down automatically, it cannot restart automatically without being reset manually.

3.4.2 Oxygen monitoring

If you use a flammable sealing liquid or a flammable seals flush liquid and you cannot carry out a pressure rise test to determine the leak tightness of the system (see Section 3.16), your pumping system must be configured so that the oxygen concentration at the discharge outlet is constantly monitored.

If an oxygen concentration > 2.5% is detected, your system must be configured to:

Introduce an inert gas into the system to reduce the oxygen concentration,

or:

Shut down the pump.

3.5 Sealing liquid and seals flush supply system design

3.5.1 Introduction

Your pump may be supplied with a sealing liquid and seals flush supply system fitted, configured in one of three ways, as described in Sections 3.5.2 to 3.5.4.

If your pump is not supplied with such a system, you must install the pump in a supply system which:

Supplies sealing liquid to the pump.

Provides seals flush supplies to the seals in the pump, to cool the seals and ensure that the seals temperature remains within the temperature classification of the pump (see Section 1.3.2).

Your supply system must be configured in one of the following three ways (shown in Figure 1):

Total recirculation system: see Section 3.5.2.

Partial recirculation system: see Section 3.5.3.

Once-through system: see Section 3.5.4.

If you need to install the pump in a supply system, your system design must ensure that:

The seals flush pipelines provide seals flush liquid supplies to cool the seals in the pump.

The seals flush supplies cannot be interrupted; the supply pipelines must incorporate suitable safety devices which you must connect to shut down the pump when a seals flush supply fails: refer to Sections 3.5.2 to 3.5.4 for more details.

The sealing and seals flush liquid supplies to the pump are clean.

You must not start the pump if the level of sealing liquid is above the pump centre line. To avoid this, configure the pump as shown in Figure 1, detail A, B or C and start-up the pump as described in Section 4.2.

LR1-01-880 Issue B


Installation

3.5.2 Total recirculation sealing liquid and seals flush supply system

A total recirculation system minimizes waste sealing liquid from the pump. Such a system may be particularly effective when used in a solvent removal or drying process, where process vapours are condensed inside the pump; the sealing liquid used can be the same as the condensed process vapours.

Refer to Figure 1, detail A. The sealing liquid discharged at the pump outlet is separated from the pumped gases and vapours in the sealing liquid reservoir (14), connected to the pump discharge outlet pipeline (19).

The sealing liquid is then recirculated to the pump through a cooler (13). This removes the heat of compression and any latent heat of condensation from the recirculated sealing liquid. If you are providing your own total recirculation system, use the most suitable cooling method (such as a heat-exchanger, or an air-blast cooler) for your system.

The sealing liquid reservoir (14) can be used to provide the seals flush supplies, or an external seals flush supply (1) can be used.

If you are providing your own total recirculation system:

If you use the sealing liquid reservoir (14) to provide the seals flush supplies, you must fit a level switch (18) in the reservoir.

If you use an external seals flush supply (1), you must fit a pressure switch (3) in the supply pipeline.

On either type of system, you must fit flow switches (5) in the seals flush supply pipelines.

Connect the flow switches, the level switch and the pressure switch as necessary to the ATEX control circuit (see Section 8) to shut down the pump if a seals flush supply fails.

3.5.3 Partial recirculation sealing liquid and seals flush supply system

Refer to Figure 1, detail B. In a partial recirculation system, part of the sealing liquid discharged at the outlet is recirculated through the pump (8).

The sealing liquid discharged at the pump outlet enters the sealing liquid reservoir (14), connected to the pump discharge outlet pipeline (19).

Fresh sealing liquid is supplied to the reservoir (14), through the float operated fill/top-up valve (15).

A mixture of fresh and recovered sealing liquid from the reservoir is then supplied to the sealing ring in the pump (through the supply pipeline: 12, 11, 10, 9).

The sealing liquid reservoir (14) can be used to provide the seals flush supplies, or an external seals flush supply (1) can be used.

If you are providing your own partial recirculation system:

If you use the sealing liquid reservoir (14) to provide the seals flush supplies, you must fit a level switch (18) in the reservoir.

If you use an external seals flush supply (1), you must fit a pressure switch (3) in the supply pipeline.

On either type of system, you must fit flow switches (5) in the seals flush supply pipelines.

Connect the flow switches, the level switch and the pressure switch as necessary to the ATEX control circuit (see Section 8) to shut down the pump if a seals flush supply fails.



3.5.4 Once-through sealing liquid and seals flush supply system

Note: Because of the potential environmental impacts, we do not recommend the use of once-through systems.

Refer to Figure 1, detail C. In once-through systems, the sealing liquid is supplied directly to the liquid ring in the pump (8), through a suitable supply pipeline (17, 16, 12, 26, 11, 10, 9).

The used sealing liquid is discharged with the pumped gases and vapours through the outlet pipeline (21) into your exhaust-extraction system.

The sealing liquid supply (17) can be used to provide the seals flush supplies, or a separate external seals flush supply (1) can be used.

If you are providing your own once-through system:

You must fit a pressure switch (3) in the seals flush supply pipeline.

You must fit flow switches (5) in the seals flush supply pipelines.

Connect the flow switches and the pressure switch to the ATEX control circuit (see Section 8) to shut down the pump if a seals flush supply fails.

LR1-01-880 Issue B


Installation

Figure 1 - Recommended sealing liquid and seals flush supply system configurations: sheet 1 of 2



Figure 1 - Recommended sealing liquid and seals flush supply system configurations: sheet 2 of 2

1. External seals flush supply*

2. Seals flush supply valve3. Seals flush pressure switch†

4. Sealing liquid seals flush supply pipeline*

5. Seals flush flow switch‡

6. Seals flush pipelines**

7. Priming/drain valve8. Liquid ring pump9. Liquid ring supply pipeline10. Sealing liquid supply flow indicator11. Temperature gauge12. Flow regulating valve13. Cooler

14. Sealing liquid reservoir15. Float operated fill/top-up valve16. Liquid ring supply valve17. Liquid ring supply18. Level switch††

19. Discharge outlet/vent20. Overflow21. Pump outlet pipeline22. Outlet temperature gauge23. Temperature transmitter §

24. Non-return valve25. Pump inlet26. Pressure gauge

* Alternative options.† Mandatory safety device on systems where the seals flush supplies are not provided from a

sealing liquid reservoir.‡ Mandatory safety devices on all systems.** There are two seals flush pipelines: one for each seal in the pump.†† On total and partial recirculation systems, this is a mandatory safety device if the seals flush

supplies are provided from the sealing liquid reservoir.

A. Total recirculation systemB. Partial recirculation systemC. Once-through system

LR1-01-880 Issue B


Installation

3.6 Unpack and inspect

1. Remove all packing materials and protective covers and check the pump. If the pump is damaged, notify your supplier and the carrier in writing within three days; state the Item Number of the pump together with your order number and your supplier's invoice number. Retain all packing materials for inspection. Do not use the pump if it is damaged.

2. Look at the pump identification plate (refer to the System Manual) and check that the pump is suitable for use in your system. If the pump is not suitable for use in your system, do not continue to install the pump: contact your Supplier or Edwards.

If the pump is not to be used immediately, replace the protective covers. Store the pump in suitable conditions, as described in Section 6.1.

3.7 Locate the pump

Ensure that the operating location is clean and free from debris and oil.

You must ensure that when the pump is in its required operating location, all of the mounting feet are in the same plane, flat on the mounting platform. The platform must be firm and level, with a maximum flatness deviation less than that specified in Table 4 (page 7).

Do not use shims or spacers under the mounting feet to level the pump.

1. Use slings around the bearing housings or casing flanges (refer to the System Manual) to connect suitable lifting equipment to the pump.

2. Use the lifting equipment to move the pump to its required operating location on the mounting platform, then disconnect the lifting equipment.

3. Fit suitable bolts through the fixing bolt holes in the mounting feet, to secure the pump in position. Refer to the System Manual for the locations and sizes of the fixing holes.

3.8 Fit the motor or drive/transmission

3.8.1 Introduction

The pump is supplied as a bareshaft pump. You must therefore fit a suitable motor (refer to Section 3.8.2), or fit a suitable drive and transmission (refer to Section 3.8.3).

3.8.2 Fit a motor

Fit your motor to the pump as specified in the manufacturer’s manual supplied with your motor. Ensure that the motor is suitable for use with the pump.

WARNING

Use suitable lifting equipment to move the pump, as described below. If you do not, you can injure yourself or damage the pump. Refer to the System Manual for the mass of the pump.

WARNING

Your motor must comply with the requirements of the ATEX Directive (94/9/EC). If it does not, the external ATEX certification will not be valid.



3.8.3 Fit a drive and transmission

You can use a coupling or a belt drive and transmission system to connect your drive to the pump.

Connect the components of the drive and transmission system to the pump drive shaft as described in the manufacturer’s instructions supplied with the components.

3.9 Connect the pump to earth (ground)

The pump is supplied with an earth (ground) stud fitted. You must connect this stud to a suitable earth (ground) to prevent static electrical discharges during operation.

Refer to the System Manual for the size and location of the earth (ground) stud on the pump.

3.10 Connect the sealing liquid and seals flush pipelines

Connect the sealing liquid and seals flush system pipelines to the pump in accordance with the requirements shown in the corresponding detail A, B or C of Figure 1.

Refer to the System Manual for the sizes and locations of the sealing liquid and seals flush supply and drain ports.

WARNING

Your drive and transmission system must comply with the ATEX Directive (94/9/EC). If it does not, the external ATEX certification will not be valid.

WARNING

Your drive and transmission system design must ensure that the maximum pump rotational speed specified in Section 2.3 cannot be exceeded.

WARNING

You must fit suitable guards to protect people from rotating/moving parts.

WARNING

You must connect the pump earth (ground) stud, to prevent static electrical discharges. Such discharges are potential ignition sources.

WARNING

Your system design must ensure that the sealing liquid supply and the seals flush liquid supplies to the pump seals cannot be interrupted when the pump is operating.

LR1-01-880 Issue B


Installation

3.11 Connect the pump inlet and outlet

3.11.1 Introduction

Take note of the following when you connect the pump suction inlet and discharge outlet:

For optimum pumping speeds, ensure that the pipeline connected to the suction inlet is as short as possible.

The pipelines connected to the suction inlet and discharge outlet must have an internal diameter not less than the pump inlet/outlet diameter.

Support the inlet and outlet pipelines to prevent loading of the inlet/outlet joints on the pump. The loads on the inlet and outlet must be less than the maximum loads specified in Table 14 (page 19).

Use a suitable inlet trap or filter to prevent the entry into the pump of particles larger than those specified in Table 2 (page 4).

The inlet and outlet seals used must be compatible with the sealing fluid used, with the substances pumped, and with the process/operating conditions.

3.11.2 Connect the suction inlet

Use a suitable gasket as a seal and connect the pipeline from your vacuum system to the suction inlet on the pump (refer to the System Manual).

The gasket you use must be made of a material which is compatible with the sealing liquid and with the process materials which will be pumped.

3.11.3 Connect the discharge outlet

CAUTIONEnsure that the maximum back-pressure specified in Section 2.3 cannot be exceeded. If it is, the drive or motor will trip and the pump will stop.

Use a suitable gasket as a seal and connect your outlet pipeline to the discharge outlet on the pump (refer to the System Manual) or on the sealing liquid supply system (see Figure 1).

The gasket you use must be made of a material which is compatible with the sealing liquid and with the process materials which will be pumped.

WARNING

Your design must prevent the discharge of dangerous gases and vapours into the surrounding atmosphere.



3.12 Fit and connect the temperature transmitter

Fit and connect your temperature transmitter (not supplied) as described below. Refer to the System Manual for the location of the temperature transmitter port on the pump; where necessary, also refer to the instructions supplied with the temperature transmitter.

1. Remove the blanking plug (if fitted) from the temperature transmitter port on the pump.

2. Fit the temperature transmitter to the temperature transmitter port.

3. Connect the outputs of the temperature transmitter to your ATEX control circuit: refer to Section 8.

3.13 Activate the automatic lubricators

CAUTIONYou must activate the automatic lubricators before you operate the pump. If you do not, the pump will be damaged when you operate it.

Activate both of the automatic lubricators on the pump as described in the lubricator instructions supplied with your pump.

The operation settings for the automatic lubricators are specified in the System Manual.

3.14 Connect the electrical supply to the motor (if necessary)

Note: A schematic diagram of the required ATEX electrical control circuit is given in Figure 2.

If you have fitted a motor to the pump (as described in Section 3.8.2), connect the electrical supply to the motor and check the connections as described below.

Note that the following procedure is a general one, applicable to all pumps. Where necessary, you must also refer to the motor manufacturer’s instructions supplied with your pump.

1. Remove the cover from the pump-motor terminal-box.

2. Remove the plug from one of the electrical supply cable entry holes in the terminal-box.

3. Fit a suitable cable-gland and nut to the entry hole, then pass the electrical supply cable through the cable-gland. Ensure that the cable-gland you use is sufficiently rated to provide the necessary seal protection.

WARNING

You must fit the temperature transmitter and connect it to the ATEX safety control circuit as described below. If you do not, the ATEX certification of the pump will not be valid.

WARNING

Ensure that your electrical connections comply with all applicable local and national safety standards.

WARNING

Ensure that your cable-gland and your electrical connections comply with the ATEX requirements.

LR1-01-880 Issue B


Installation

4. Ensure than any links in the terminal-box are correctly configured for your electrical supply.

5. Connect the wires in your electrical supply cable to the terminals in the terminal-box:

Connect the phase wires to the phase terminals.

Connect the earth (ground) wire to the earth (ground) terminal.

6. Tighten the cable-gland nut strain relief screws.

7. Refit the cover to the terminal-box.

8. Use a CLARE tester (or equivalent device) to perform the following tests on the electrical connections, and rectify any problems found:

Earth (ground) continuity test.

High voltage flash test.

Insulation test.

3.15 Check the direction of pump rotation

CAUTIONDo not continue to operate the pump without sealing liquid in the pump. If you do, there may be a risk of damage to the pump.

Check the direction of rotation of the pump as follows:

1. If necessary (that is, to make it easier to see the pump drive shaft), temporarily remove any guard over the drive coupling or belt.

2. Watch the pump drive shaft while you start up the pump (refer to Section 4.2), then shut down the pump (refer to Section 4.4) after two seconds or so.

3. Check that the pump drive shaft rotated correctly in the direction shown by the arrow on the pump or motor.

4. If the direction of rotation was incorrect:

If you have fitted a drive and transmission system: check the drive and transmission system and reconfigure as appropriate.

If you have fitted a motor to the pump: check the electrical connections to the motor and reconfigure as necessary.

Perform the direction of rotation check from Step 2 again, to ensure that the pump now rotates in the correct direction.

5. If you have removed the guard over the drive coupling or belt (as in Step 1 above), refit the guard.

WARNING

Ensure that the pump rotates in the correct direction. If it does not, the pump and your vacuum system can become pressurised when you operate the pump.

WARNING

If you remove a guard during the following procedure, ensure that you do not come into contact with the shaft, the coupling/belt or the drive system when you operate the pump. If you do, you may be injured by the rotating components.



3.16 Check the leak tightness of the system

3.16.1 General requirements

Check the leak tightness of the system and seal any leaks found after you have installed the pump, to prevent leakage of substances out of the system and leakage of air into the system.

The system must be sufficiently leak tight to limit any air leakage into the system to a level which obviates the risk of fire or explosion.

3.16.2 Use of flammable sealing/seals flush liquids

Note: The acceptable pressure rise limit depends on your application. If necessary, contact Edwards for advice.

If you use a flammable sealing/seals flush liquid (see Section 3.3), you must ensure that the system is sufficiently leak tight, otherwise there will be a risk of explosion during pump operation.

We recommend that you carry out a pressure rise test, as follows:

1. Evacuate the process system to a pressure just lower than the normal operating pressure.

2. Isolate the process system from the pump, as close as possible to the pump suction inlet.

3. Monitor the process system pressure over a fixed time.

4. If the pressure rise exceeds the acceptable limit for your system, identify and seal the leaks into the system, then repeat the test to ensure that the system is now sufficiently leak tight.

If for some reason you cannot carry out a pressure rise test, your system must be configured to perform continuous oxygen monitoring: see Section 3.4.2.

WARNING

Ensure that the system is sufficiently leak tight. If you do not, there will be a risk of explosion during operation.

LR1-01-880 Issue B




Operation

LR1-01-880 Issue B

4 Operation

CAUTIONEdwards will accept no liability or warranty claims if your pump is used on applications or in a way prohibited in this manual, or not specified in this manual.

Note: The procedures in the following sections assume that your sealing liquid supply system is as shown in Figure 1, detail A, B or C.

4.1 General operation safety

Do not expose any part of your body to vacuum.

Do not operate the pump with the suction inlet or discharge outlet open to the atmosphere.

Do not operate the pump without sealing liquid in the pump.

During operation, prevent accidental contact with the hot pump. Note that if you use hot sealing liquid (up to 70 °C), the temperatures of the pump discharge outlet and seal surfaces will be higher than the temperature of the sealing liquid supply.

Do not continue to operate the pump under cavitation conditions. If you do, the pump can be severely damaged (see Section 4.3).

Never disconnect any of the connecting pipelines (for example, the sealing liquid supply pipeline) when the pump is operating.

Where necessary, wear ear defenders. The pump can be noisy during operation (refer to Section 2.4).

4.2 Start-up

1. Refer to Figure 1, detail A, B or C. Open the sealing liquid supply valve (16).

If the pump is installed in a total recirculation sealing liquid supply system (as in detail A), wait until the level of sealing liquid in the sealing liquid reservoir (14) is correct, and then close the sealing liquid supply valve (16).

If the pump is installed in a partial recirculation sealing liquid supply system (as in detail B), wait until the level of sealing liquid in the sealing liquid reservoir (14) is correct.

2. Ensure that all isolation-valves (if fitted) in the discharge outlet pipelines are open.

3. Ensure that the flow regulating valve (12) is closed, then open the seals flush supply valve (2).

WARNING

Obey the safety instructions and precautions listed below. If you do not, there may be a risk of injury or death to people, or damage to the pump.

WARNING

Do not operate the pump without sealing liquid in the pump. If you do, there may be a risk of fire or damage to the pump.

LR1-01-880 Issue B


Operation

4. If the pump is installed in a once-through sealing liquid supply system (as in detail C) or in a total or partial recirculation sealing liquid supply system (as in details A and B) in which the seals flush supply is not provided from the sealing liquid reservoir, check that the seals flush supply pressure (as indicated by the pressure switch, 3) is correct.

5. Start the pump. That is, switch on the electrical supply to the motor, or engage your drive and transmission system.

6. Open any isolation-valves (if fitted) in the suction inlet pipelines.

7. Slowly open the flow regulating valve (12) until the required sealing liquid flow rate at the pump suction inlet is obtained (as shown on a flow indicator, if fitted).

4.3 Cavitation and hammer

Under cavitation conditions, the pump will be unusually noisy during operation. Cavitation conditions occur when the vacuum pressure is close to the vapour pressure of the sealing liquid (see Section 2.5), and can result from:

Operation of the pump with an insufficient non-condensable gas load. (For example, operation of a pump which is over-sized for the application, or operation of the pump when an isolation valve in the suction inlet pipeline is closed)

Operation of the pump with insufficient sealing liquid in the pump.

Operation of the pump with the sealing liquid supply temperature too high.

However, the pump may also be unusually noisy during operation due to ‘hammer’. Hammer occurs when the flow rate of sealing liquid into the pump is too high.

Refer to Figure 1. If the pump is unusually noisy during operation, slowly close the sealing liquid supply flow regulating valve (12):

If the pump quietens down, the noise was due to hammer. You can now continue to operate the pump as normal.

If the pump continues to operate noisily, or if the noise level increases, the pump is operating under cavitation conditions:

Immediately shut down the pump (refer to Section 4.4). Do not continue to operate the pump, or it may be severely damaged.

WARNING

Do not operate the pump under cavitation conditions. If you do, the pump can be severely damaged, and there may be a consequent risk of fire or explosion.


Operation

LR1-01-880 Issue B

4.4 Shut-down

1. Refer to Figure 1. Fully close the liquid ring flow regulating valve (12).

2. Close any isolation valves in the suction inlet and discharge outlet pipelines.

3. Immediately stop the pump. That is:

Switch off the electrical supply to the motor, or:

Disengage the drive and transmission system.

4. Close the seals flush supply valve (2).

5. On partial recirculation and once-through sealing liquid supply systems (as in details B and C), close the sealing liquid supply valve (16).

WARNING

Ensure that it is safe to shut down the pump before you use the following procedure.

LR1-01-880 Issue B




Maintenance

LR1-01-880 Issue B

5 Maintenance5.1 Safety information

A suitably trained and supervised technician must maintain the pump. Obey your local and national safety requirements.

Ensure that the maintenance technician is familiar with the safety procedures which relate to the sealing/seals flush liquid(s) and the products processed by the pumping-system.

Allow the pump to cool to a safe temperature before you start maintenance work.

Isolate the pump and other components in the pumping system from the drive system so that they can not be operated accidentally.

Recheck the pump rotation direction (see Section 3.15) if the electrical supply or the drive and transmission system has been disconnected/reconnected.

Do not reuse seals if they are damaged.

The pump and sealing/seals flush liquid(s) will be contaminated with the materials that have been pumped during operation. Ensure that the pump is decontaminated before maintenance and that you take adequate precautions to protect people from the effects of dangerous substances if contamination has occurred.

Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the pump has been heated to 260 °C and above. These breakdown products are very dangerous. Fluorinated materials in the pump may include greases and seals. The pump may have overheated if it was misused, if it malfunctioned or if it was in a fire. Edwards Material Safety Data Sheets for fluorinated materials used in the pump are available on request: contact your supplier or Edwards.

If the pump has been used with a water-based sealing liquid, ensure that you take suitable precautions against any harmful bacteria which may be inside the pump or sealing liquid supply system.

Leak-test the system after maintenance work is complete if you have connected or disconnected any suction inlet or discharge outlet joints; seal any leaks found.

5.2 Maintenance plan

The plan in Table 15 (page 38) details the maintenance operations required to maintain the pump in normal operation. Instructions for each operation are given in the section shown.

You must overhaul the pump in accordance with (or more frequently than) the frequency specified in Table 15.

When you maintain the pump, use Edwards spares: refer to Section 7.3.

WARNING

Obey the safety instructions given below and take note of appropriate precautions. If you do not, you can cause injury to people and damage to equipment.

WARNING

You must maintain the pump using the schedule given in Table 15, and as described in sections 5.3 to 5.7 of this manual for the ATEX certification to remain valid.

LR1-01-880 Issue B


Maintenance

5.3 Inspect the pipelines and connections

Note: Where possible, we recommend that you investigate the cause of any damage or corrosion, and implement corrective measures to prevent any future damage of components.

Use the following procedure to inspect the pipelines and connections:

1. Inspect all of the suction inlet pipelines and connections and check that they are not damaged or corroded and that they do not leak. Repair or replace any damaged or corroded component and seal any leak found.

2. Inspect all of the discharge outlet pipelines and connections and check that they are not damaged or corroded and that they do not leak. Repair or replace any damaged or corroded component and seal any leak found.

3. Inspect all of the electrical cables connected to the pump and check that they are not damaged and have not overheated. Repair or replace any damaged or overheated cable.

4. Check that all electrical connections to the pump are secure. Tighten any loose connections.

5. Inspect all of the sealing liquid and seals flush liquid supply system components, pipelines and connections and check that they are not damaged or corroded and that they do not leak.

If any component, pipeline or connection is damaged or corroded, or if a leak is found:

If the pump was supplied without a sealing liquid and seals flush liquid supply system, repair or replace any damaged or corroded component and seal any leak found.

If the pump was supplied with a sealing liquid and seals flush liquid supply system, contact Edwards to arrange for inspection and repair of the system.

Table 15 - Maintenance plan

Operation Frequency Refer to Section

Inspect the pipelines and connections Weekly 5.3

Check the ATEX safety devices for correct operation Monthly 5.4

Replace the automatic lubricators Yearly 5.5

Calibrate the ATEX safety devices Yearly 5.6

Overhaul the pump 3 Yearly 5.7


Maintenance

LR1-01-880 Issue B

5.4 Check the ATEX safety devices for correct operation

You must regularly check that the ATEX safety devices in your system operate correctly:

1. Refer to Figure 1. Check that the flow switches (5) in your seals flush supply pipelines operate correctly to shut down your system when the flow rate is too low.

2. If the pump is installed in a once-through sealing liquid supply system (as in detail C) or in a total or partial recirculation sealing liquid supply system (as in details A and B) in which the seals flush supply is not provided from the sealing liquid reservoir (14), check that the pressure switch (3) in your seals flush supply pipeline operates correctly to shut down your system when the supply pressure is too low.

3. If the pump is installed in a total or partial recirculation sealing liquid supply system (as in details A and B) in which the seals flush supply is provided from the sealing liquid reservoir (14), check that the level switch (18) in the reservoir operates correctly to shut down your system when the level of liquid in the reservoir is too low.

4. Check that the temperature transmitter (23) operates correctly to shut down your system when the temperature of the sealing liquid ring in the pump is too high.

5.5 Replace the automatic lubricators

CAUTIONYou must replace and activate the automatic lubricators as described below before you operate the pump again. If you do not, the pump will be damaged when you operate it.

Use the procedure given below to replace each lubricator. Refer to the System Manual for the locations of the lubrication ports on the pump. Where necessary, refer to any Instructions supplied with the new automatic lubricators.

1. Clean the area around the adaptor on the lubricator, then unscrew the adaptor from the lubrication port on the pump and remove the used lubricator.

2. Dispose of the used lubricator: refer to Section 6.2.

3. If necessary, clean any grease or debris from the lubrication port on the pump.

4. Remove the protective cover (if fitted) from the adaptor on the new lubricator.

5. Fit the adaptor on the new lubricator to the lubrication port on the pump, then tighten by hand.

6. Activate the lubricator: refer to Section 3.13.

WARNING

You must regularly check the ATEX safety devices for correct operation as described below. If you do not, the ATEX certification of your system will not be valid.

LR1-01-880 Issue B


Maintenance

5.6 Calibrate the ATEX safety devices

You must calibrate the ATEX safety devices in your system every year, to ensure that the devices will operate correctly.

Calibrate the devices as described in the manufacturer’s instructions supplied with the devices.

5.7 Overhaul the pump

The pump must be overhauled every three years, and the bearings in the pump must be replaced as part of the overhaul.

Pump overhaul must be carried out at an Edwards Service Centre. Contact your supplier or your nearest Edwards company to arrange for the overhaul.

5.8 Fault finding

A guide to fault conditions and their possible causes is provided in Table 16 to assist you in basic fault finding.

If you are unable to rectify a fault when you use this guide, call your supplier or your nearest Edwards Service Centre for advice.

WARNING

You must regularly calibrate the ATEX safety devices as described below. If you do not, the ATEX certification of your system will not be valid.


Maintenance

LR1-01-880 Issue B

Table 16 - Fault finding

Symptom Check Action

A drive protection device switches off your drive after switch-on, or a torque limiting device in your drive and transmission system trips.

Has the drive/transmission overloaded ?

Reduce the flow rate of sealing liquid to the pump.

Is the back-pressure too high ? Reduce the back-pressure.

Is the drive/transmission system damaged ?

Inspect and repair or replace as necessary.

Excessive electrical current is drawn by your drive and transmission system during operation.

Are there deposits or particulates inside the pump ?

Contact your supplier or Edwards to arrange for inspection and cleaning of the pump.

Has the drive/transmission overloaded ?

Reduce the flow rate of sealing liquid to the pump.

Is the back-pressure too high ? Reduce the back-pressure.

Is the drive/transmission system damaged ?

Inspect and repair or replace as necessary.

Vacuum pumping performance is poor.

Is the sealing liquid supply inadequate, or is its temperature too high ?

Check that the sealing liquid supply is as specified in Section 2.5.

Is the direction of pump rotation incorrect ?

Check the direction of pump rotation and correct as necessary: refer to Section 3.15.

Is there a leak in the suction inlet pipeline ?

Leak test the inlet pipeline and seal any leaks found (see Section 3.16).

The pump is noisy during operation.

Is the pump operating under cavitation conditions ?

Check that any isolation valves in the suction inlet pipelines are open.

There may be a loss of sealing liquid: check for correct operation of the flow and pressure or level switches and the temperature transmitter (see Section 3.1), which should have operated to shut down the pump in these conditions.

Is the flow of sealing liquid to the pump too high ?

Check that the sealing liquid supply is as specified in Section 2.5. If necessary, reduce the flow rate of the sealing liquid into the pump (see Section 4.3).

Is the pump damaged or in need of repair ?

Contact your supplier or Edwards to arrange for pump inspection.

- - If you have made the checks/actions as described above and you still cannot identify the cause of a fault, or if you cannot rectify a fault, contact your supplier or Edwards for advice.

LR1-01-880 Issue B




Storage and disposalLR1-01-880 Issue B

6 Storage and disposal6.1 Storage

6.1.1 Preparation

Use the following procedure to remove the pump from your system in preparation for storage:

1. Shut-down the pump as described in Section 4.4.

2. Where necessary, disconnect the drive and transmission system from the pump drive shaft: refer to the manufacturer’s instructions supplied with your transmission system.

3. Purge your vacuum system and the pump with dry nitrogen and disconnect the pump from your vacuum and discharge system.

4. Place and secure protective covers over the pump suction inlet, discharge outlet, sealing liquid and seals flush connections.

5. Use suitable lifting equipment to move the pump to its storage area: refer to Section 3.7.

6. Store the pump as described in Section 6.1.2 or 6.1.3.

6.1.2 Short-term storage

If the pump is to be stored for no longer than two months:

Store the pump indoors, in cool, dry conditions, at an ambient temperature of not less than 5 °C.

Every 10 days or less, turn the pump drive shaft through three or four revolutions, to turn the pump and prevent seizure.

When required for use, prepare and install the pump as described in Section 3.

WARNING

If the pump has been used with a water-based sealing liquid, harmful bacteria may have propagated inside the pump. Ensure that you wear the appropriate Personal Protective Equipment (PPE) when you prepare the pump for storage.

LR1-01-880 Issue B


Storage and disposal

6.1.3 Long-term storage

If the pump is to be stored for two months or more:

1. Drain the sealing liquid from the pump.

2. Remove the protective covers from the suction inlet and discharge outlet.

3. Spray a suitable corrosion inhibitor (such as Mobil Oil SINTILO R) through the pump inlet and/or the pump discharge outlet, onto the internal surfaces of the pump.

4. Refit the protective covers to the suction inlet and discharge outlet.

5. Cover the pump with plastic sheet or PVC film. Place suitable anti-condensation materials (such as desiccants) inside the sheet/film.

We then recommend that, every 30 days or less:

You spray a suitable corrosion inhibitor (such as Mobil Oil SINTILO R) through the pump inlet and/or the pump discharge outlet, onto the internal surfaces of the pump.

You turn the drive shaft through three or four revolutions, to turn the pump and prevent seizure.

When required for use:

Flush the pump with a suitable cleaning solution, to remove any corrosion inhibitor from the pump.

Prepare and install the pump as described in Section 3.

WARNING

Ensure that you wear the appropriate Personal Protective Equipment (PPE) when you drain the pump, if the contaminated sealing liquid is classified as hazardous, or if the pump has been used with a water-based sealing liquid (in which case, harmful bacteria may have propagated inside the pump).


Storage and disposalLR1-01-880 Issue B

6.2 Disposal

Safely dispose of the pump, sealing/seals flush liquid and any components in accordance with all local and national safety and environmental requirements.

Take particular care with the following:

Components that have been contaminated with dangerous substances.

Sealing/seals flush liquid that has been contaminated with dangerous substances.

Used water-based sealing liquid, or components contaminated with used water-based sealing liquid.

WARNING

Ensure that you wear the appropriate Personal Protective Equipment (PPE) when you handle sealing liquid or components which have been contaminated with dangerous substances, or handle used water-based sealing liquid (which may contain harmful bacteria) or components contaminated with this sealing liquid.

LR1-01-880 Issue B




Service and sparesLR1-01-880 Issue B

7 Service and spares7.1 Introduction

Edwards products, spares and accessories are available from Edwards companies in Belgium, Brazil, China, France, Germany, Israel, Italy, Japan, Korea, Singapore, United Kingdom, U.S.A and a world-wide network of distributors. The majority of these centres employ Service Engineers who have undergone comprehensive Edwards training courses.

Order spare parts and accessories from your nearest Edwards company or distributor. When you order, state for each part required:

Model and Item Number of your equipment.

Serial number.

Item Number and description of part.

7.2 Service

Edwards products are supported by a world-wide network of Edwards Service Centres. Each Service Centre offers a wide range of options including: equipment decontamination; service exchange; repair; rebuild and testing to factory specifications. Equipment which has been serviced, repaired or rebuilt is returned with a full warranty.

Your local Service Centre can also provide Edwards engineers to support on-site maintenance, service or repair of your equipment.

For more information about service options, contact your nearest Service Centre or other Edwards company.

7.3 Spares

The only spare common to all of the pumps is as shown below:

(Note that you will need two automatic lubricators for the yearly maintenance operation specified in Section 5.5.)

Refer to your System Manual for other pump spares.

Spare Item NumberAutomatic lubricator LAGD125WA2

LR1-01-880 Issue B




ATEX safety control circuitLR1-01-880 Issue B

8 ATEX safety control circuit

8.1 Introduction

The ATEX safety control circuit is shown in Figure 2. You must incorporate this control circuit into your system, and use the circuit as described in previous sections of this manual.

Note that the circuit diagram shows the use of an electrical motor as an example only. Another type of drive (such as an internal combustion engine) can be used. Regardless of the drive used, the circuit must ensure that the drive is stopped when necessary.

8.2 Safety critical components

As shown in Figure 2 sheet 3 and listed in Table 17, some of the components are safety critical components and must be used in the ATEX safety control circuit. You cannot use alternative components.

8.3 Manual reset

The pump must not be able to automatically restart after a condition which has caused a trip clears.

Your control circuit must incorporate a manual reset device which you must use to manually reset the system in order to start it again, after a trip has occurred.

WARNING

You must incorporate the ATEX safety control circuit as shown in Figure 2 and as described below. If you do not, the ATEX certification of your system will not be valid.

Table 17 - ATEX safety control circuit safety critical components

Figure 2 key Item Manufacturer’s reference Manufacturer

16 Trip amplifier KFD2-GU-Ex. 1 Pepperl + Fuchs

17 Switch unit KFD2-SR2-Ex 1.W Pepperl + Fuchs

20 Safety relay 700S-CF530DJC Allen Bradley

LR1-01-880 Issue B

Page 50©

Edwards Lim

ited 2010. All rights reserved.Edw

ards and the Edwards logo are tradem

arks of Edwards Lim

ited.

ATEX safety control circuit

Figure 2 - ATEX safety control circuit (sheet 1 of 4)

© Edw

ards Limited 2010. All rights reserved.

Page 51Edw


arks of Edwards Lim

ited.



LR1-01-880 Issue B

Page 52©

Edwards Lim

ited 2010. All rights reserved.Edw


arks of Edwards Lim

ited.

ATEX safety control circuit


© Edw

ards Limited 2010. All rights reserved.

Page 53Edw


arks of Edwards Lim

ited.



1. Electrical supply isolator2. +ve control supply3. Thermistor relay4. ‘Stop’ pushbutton5. ‘Start’ pushbutton6. Fault indicator lamp7. Pump DOL starter8. 0 V control supply9. Pump motor10. Motor starter contacts11. Circuit breaker

12. Safety relay contact13. Sealing ring temperature transmitter *

14. Seals flush pressure switch† or sealing liquid reservoir level switch‡

15. Seals flush flow switch*

16. Trip amplifier17. Switch unit**

18. ‘Reset’ pushbutton19. Trip indicator lamp20. Safety relay †

21. Safety relay contacts

* Safety critical devices: refer to Section 3.1.† Safety critical device: only fitted to once-through sealing liquid supply systems, or total or partial recirculation sealing

liquid supply systems where the seals flush supply is not provided by the sealing liquid reservoir.‡ Safety critical device: only fitted to total or partial recirculation sealing liquid supply systems where the seals flush supply

is provided by the sealing liquid reservoir.** Safety critical components: see Section 8.2.

LR1-01-880 Issue B



Documents

Issue B Original Instruction Manual