Operating instructions for Netter pneumatic linear vibrators of the series NTP

Nov. 2018 No. 1391E Page 1/21

These operating instructions apply to: NTP 18 NTP 25

NTP 32 NTP 48

2

Contents

1 General information 3

2 Safety 5

3 Technical data 7

4 Design and function 10

5 Transport and storage 11

6 Installation 12

7 Start-up and operation 15

8 Maintenance and servicing 17

9 Troubleshooting 18

10 Spare parts and accessories 19

11 Disposal 20

12 Annex 21

Please refer to the delivery note for the scope of delivery.

Check the packaging for possible transport damage. In the event of damage to the packaging, check the contents for completeness and possible damage. Inform the carrier in the case of damage.

The pneumatic linear vibrators of the series NTP are hereafter referred to as „NTP“.

Document no. 1391E

Version no. 1

Date of issue Nov. 2018

Scope of delivery

Designation

Version number

General information

3

1 General information

Before installing the NTP read these instructions carefully. It is the basis for any action when dealing with the NTP, and may be used for training purposes. The instructions should be subsequently stored at the operation site.

The target group for these instructions is technical staff, who have basic knowledge in pneumatics and mechanics.

Therefore, only staff who are trained in these fields may work on the NTP.

The NTP may only be installed, put into operation, maintained, troubleshot and disassembled by persons authorised by the operator.

This documentation is protected by copyright.

NetterVibration reserves all rights such as translations, reprinting and re-production of the instructions, as well as parts thereof.

All technical information, data and instructions for installation, operation and maintenance in these instructions are based on the latest information available at the time of printing and take our past experience to the best of our knowledge into account.

No claims can be derived from the information, illustrations and descrip-tions in these operating instructions.

The manufacturer does not assume liability for damages resulting from:

• failure to observe the instructions,

• improper use,

• unauthorised repairs,

• technical modifications,

• use of non-permissible spare parts.

Translations are made to the best of our knowledge.

NetterVibration does not assume liability for translation errors, even if the translation was made by us or on our behalf. Only the original German text remains binding.

The pneumatic linear vibrators of the series NTP comply with the EC Ma-chinery Directive 2006/42/EC.

In particular, the standard EN ISO 12100 has been observed.

Use and storage

Target group

Copyright

Limitation of liability

Directives / standards observed

General information

4

The following instruction and warning symbols are used in these instruc-tions:

DANGER

signifies an immediate danger.

Disregard of this notice will result in death or severe bodily injuries.

WARNING

signifies a potential danger.

Disregard of this notice can result in death or severe bodily injuries.

CAUTION

signifies a potentially dangerous situation.

Disregard of this notice can result in minor or moderate bodily injuries.

NOTICE

signifies potential material damage.

Disregard of this notice can result in material damage.

IMPORTANT

indicates actions, methods or notes that are not relative to safety, e.g. use-ful information and tips.

Environmentally safe disposal

indicates the obligation of environmentally safe disposal.

Instruction and warning symbols

Personal injuries

Material damages

Notes

Safety

5

2 Safety

The NTP are intended for installation in machines.

General applications are: loosening, conveying, compacting, separating bulk materials and reducing friction. NTP are used for emptying bunkers and as drives for sieves and vibration tables.

The NTP may also be operated in dusty and wet environment, but not in water or in other liquids.

The NTP B+C may only be operated clocked.

Any other use is considered improper.

Installation, commissioning, maintenance and troubleshooting of the NTP may only be performed by authorised qualified personnel.

All handling of the NTP is the responsibility of the operator.

IMPORTANT

NetterVibration assumes no liability for personal injuries and material damages if technical changes to the product were made or the notices and regulations in these instructions were not observed.

WARNING

Falling parts

The NTP, construction parts as well as fastening screws can come loose due to vibration. Falling parts lead to severe personal injuries.

➢ Check the fastening screws after one hour of operation and thereafter at regular intervals (generally monthly).

➢ Retighten the fastening screws, if necessary.

➢ A safety device with a safety cable is mandatory for criti-cal mounting situations.

WARNING

Compressed air

A loosened hose which is under pressure can lead to personal injuries.

➢ Screw the hose lines on carefully.

➢ Check the hose lines and connections after one hour of operation and thereafter regularly (generally monthly).

➢ Retighten the hose lines, if necessary.

➢ Ensure that the compressed air is disconnected from the supply lines during all work on the NTP.

➢ Prevent the NTP from being switched back on during all work.

Intended use

Qualification of qualified personnel

Liability

Falling parts

Compressed air

Safety

6

WARNING

Sound level

Near the NTP or in the vicinity of the constructions connect-ed with the NTP, the sound pressure level may exceed 80 > dB(A). The human ear can be permanently damaged by the high sound level.

➢ When working in the noise area, use ear protection if 80 > dB(A) is exceeded.

Sound level

Technical data

7

3 Technical data

Drive medium

NTP must be operated with clean, lubricated compressed air or lubricated nitrogen according to the following specification:

ISO 8573-1 [ 5 : 6 : 4 ]

Filter ≤ 5 µm

Humidity, Pressure dew point ≤ +3 °C

Total oil content ≤ 5 mg/m3

NTP L versions are suitable for operation with oil-free, dried com-pressed air according to the following specification:

ISO 8573-1 [ 5 : 6 : 2 ]

Lubrication ISO viscosity class according to DIN ISO 3448, VG 5 to 15 Fill the mist lubricator with acid- and resin-free compressed air oil.

Recommendation for temperatures from 0 to 60 °C:

Klüber "AIRPRESS 15"

Specification for temperatures above 60 °C with HT designs:

Aral „Farolin“

Specification for temperatures from 0 to -20 °C:

Klüber "ISOFLEX PDP 10"

Specification for temperatures below -20 °C for NT versions:

BREAK FREE® CLP

Ambient temperature*

Standard and NTP L versions: 5 °C to 60 °C

NT versions:

-32 °C to 60 °C

HT versions:

5 °C to 160 °C, depending on ver-sion

Operating pressure*

2,0 to 6,0 bar

* Higher operating pressures and temperatures are only permitted after consultation with and the written con-sent of application engineers from NetterVibration.

IMPORTANT

NTP B + C may only be operated clocked.

A duty time of max. 60 s must be followed by a pause of at least 60 s. Al-ternatively, with a short duty time (≤ 12 s) a pause factor of 5 may be used (e.g.: duty time 5 s - pause time 25 s).

Permissible operating conditions

Clocked operation

Technical data

8

The type designations of the NTP differ as follows:

NTP B have no impact plate, the piston swings against an air cush-ion.

NTP B+A have an impact plate made of steel in the base plate (hard-hitting with high noise level).

NTP B+C have an impact plate (elastomer disc) that is inserted in the base plate.

NTP B+C is the standard version.

Type: NTP ...

Unbalance

[cmkg]

Frequency

[min-1]

Centrifugal force

[N]

Air consumption

[l/min]

Sound level*

[dB(A)]

2 bar 4 bar 6 bar 2 bar 4 bar 6 bar 2 bar 4 bar 6 bar 2 bar 6 bar 2 bar 6 bar

18 B 0.090 0.100 0.110 3,828 4,680 5,490 69 118 183 12 67 65 77

18 B+C 0.060 0.060 0.060 6,600 9,420 11,160 147 300 421 20 64 75 87

25 B 0.488 0.613 0.686 2,645 3,159 3,602 190 341 487 23 92 64 73

25 B+C 0.144 0.163 0.196 5,848 7,000 8,784 269 438 830 33 108 68 82

32 B 1.080 1.365 1.449 1,824 2,221 2,614 197 369 543 37 143 64 77

32 B+C 0.602 0.665 0.665 2,959 4,080 5,040 289 607 926 50 198 71 86

48 B 4.718 6.188 6.641 1,328 1,603 1,963 456 872 1,403 67 295 65 80

48 B+C 2.081 1.992 1.992 2,618 3,456 4,320 782 1,305 2,039 96 336 78 90

* at 1 m distance

The technical performance data changes over the service life (wear and contamination).

The sound emitted by the NTP can be dampened by covers (on request). This is only worthwhile if the impacted sheet metal is also insulated (e.g. by heat insulation material).

Type designation

Parameters

Service life

Sound level reduction

Technical data

9

NTP 18 NTP 25 NTP 32 / 48

Type: NTP ...

A [mm]

B [mm]

C [mm]

Ø D [mm]

E [mm]

F [mm]

G [mm]

H [mm]

K [mm]

Ø L [mm]

N [mm]

Weight [kg]

18 60.2 53 43 5.2 21.5 12 M5 10.5 - 30 M5 0.16

25 90 60 46 6.5 36 14.5 G 1/8 15 8 51 G 1/8 0.61

32 140 75 51 11 48 32 G 1/4 20 10 70 G 1/4 1.47

48 194 100 78 13 60 51 G 3/8 25 15 95 G 3/8 3.95

NetterVibration recommends the following tightening torques for fastening screws and nuts of the strength class 8.8 (sliding friction coefficient 0.14):

Type: NTP ...

Thread Tightening torque [Nm]

Minimum screw depth for tapped

hole in S 235 JR *

[mm]

18 M5 6 8

25 M6 10 10

32 M10 50 17

48 M12 87 20

* Material S 235 JR = St 37-2, minimum screw depth for other materials on request

NetterVibration recommends the following cross-sections for 3/2-way valves and hoses:

Type: NTP ...

Connection thread Hose/valve size Exhaust air thread

18 M5 NW 4 M5

25 G 1/8 NW 4 G 1/8

32 G 1/4 NW 6 G 1/4

48 G 3/8 NW 9 G 3/8

Dimensions

Tightening torques

Valves / hoses

Design and function

10

4 Design and function

1 Cover

2 Housing screw (cover)

3 Housing

4 Air inlet/ grommet

5 Piston

6 Air inlet/ silencer

7 Housing screw (base plate)

8 Base plate

9 Impact plate

The vibrations are generated by a free-swinging differential pressure pis-ton (5).

In the standard version NTP B+C the piston (5) strikes against an impact plate (9) made of elastomer, thereby achieving a rubber hammer effect.

The version B has no impact plate, the piston (5) swings quietly against an air cushion.

If the NTP is to produce hard strokes, then either insert an impact plate (9) made of steel into the base plate (8) or completely remove the base plate. The result is hard strokes on the surface on which the NTP is attached.

The NTP generate linear vibrations.

The momentum of the freely oscillating piston (= mass x distance) deter-mines the amplitude.

The amplitude is set by throttling the exhaust air, the frequency is infinitely variable via the operating pressure.

Design

Function

Transport and storage

11

5 Transport and storage

Special conditions of transport are not required.

The NTP are packed and ready for assembly. Accessories and add-on parts are delivered unmounted, unless otherwise agreed upon.

The packaging protects the NTP from transport damage. The packaging material has been selected from an environmentally safe and technically disposable point of view and is therefore recyclable.

The return of packaging to the material cycle conserves raw materials and reduces the amount of waste.

When storing the NTP, observe the following conditions:

• Store the NTP in a dry and clean environment.

• The storage temperature is between -20 °C and +60 °C.

• Close all openings when re-storing.

• Preserve all NTP apart from the NTP L before storage:

1. Add anti-corrosion oil to the air inlet of the NTP.

2. Actuate the NTP briefly when mounted.

3. Then close the supply air connections of the NTP.

If the NTP L are stored for longer than 6 months, then the NTP L must be checked by NetterVibration before anewed start-up.

Transport conditions

Packaging

Storage

Inspection of the NTP L

Installation

12

6 Installation

IMPORTANT

Observe the safety instructions in Ch. Safety, page 5.

For operation of the NTP a 3/2-way valve is provided,

• to ensure a faultless start in any installation position.

• in order to achieve an immediate standstill when switched off.

Use a maintenance unit for all installations.

The maintenance unit should consist of a filter, a regulator and a mist lu-bricator (see Ch. Technical data, page 7; "Drive medium"), the NTP L a filter und regulator.

Connect the NTP with a pneumatic hose according to the following pneu-matic circuit diagram shown.

1 Maintenance unit (NTP L: without mist lubricator)

2 3/2-way valve

Special circuit diagrams are available on request.

Information regarding tightening torques for screws as well as cross sec-tions for valves and hoses can be found in Ch. Technical data, page 7.

Depending on the type of NTP, NetterVibration supplies suitable fas-tening sets for tapped holes (NBS G) and through-holes (NBS D) for se-cure and permanent attachment of the NTP on the weld-on console.

When installing the NTP carry out the following steps in succession:

1. Mount the NTP with the fastening screws on a clean and even surface (± 0,1 mm) without paint residues or burn-ins. The NTP must be fully in contact with the surface so that no tension in the housing occurs when tightening the fastening screws, which could cause mechanical dam-age.

Safety instructions

Operation with 3/2-way valve

Components for all installations

Standard installation

Technical data

NBS fastening kits

Procedure

Installation

13

NetterVibration recom-mends mounting the NTP on a weld-on console. Weld the weld-on console to the on-site mounting surface so that the vibration energy is opti-mally distributed.

NTP on weld-on console

2. Observe the recommended values for screw size and tightening tor-ques.

3. If necessary, additionally use a medium-strength liquid safety agent to secure the screw connections.

4. Observe the recommended cross-sections for valves and hoses. For the air supply, preferably use screw connections with integrated seals or a liquid sealant. Avoid sealing tape. Do not use longer screw-in threads for the air supply than intended (e.g. no pipes with external thread). Otherwise the housing may be deformed and the piston there-by jammed.

5. Fasten the compressed air supply securely.

The air resistance increases with the hose length. The nominal diameters in Ch. Technical data, from page 7 on, apply to hose lengths up to 3 m. Longer supply lines require larger cross-sections.

If necessary, the escaping air is diverted through a hose, which must be installed as follows:

1. Remove the silencer.

2. Fasten the exhaust air hose directly to the exhaust air connection.

3. Mount the silencer at the free end of the exhaust hose.

If the NTP is to achieve full performance, then the exhaust hose must have a larger nominal size than the supply hose.

Air supply

Air discharge line

Installation

14

Check that the following steps have been carried out:

Compliance with permissible ambient temperatures ensured?

NTP mounted on even surface (±0,1 mm flatness)?

Securing of fastening screws (NBS) checked?

Screw size and tightening torques observed?

Maintenance unit (filter, regulator, mist lubricator; NTP L: filter, regulator), valve and supply line mounted?

Compressed air supply line securely fastened?

Specifications on kind of hose, hose length and nominal width observed?

Silencer mounted?

NTP secured against falling by means of a safety cable in criti-cal assembly situations?

Checklist installation

Start-up and operation

15

7 Start-up and operation

IMPORTANT

Observe the safety instructions in Ch. Safety, page 5.

Please refer to Ch. Technical data, page 7 for permissible operating condi-tions.

The frequency of the NTP should be set or regulated with the pressure regulator of the maintenance unit. Use a 3/2-way valve.

The frequency is reduced by lowering the air pressure before the NTP.

The centrifugal force is hereby also reduced. At the same time the ampli-tude remains almost constant.

If required, install a throttle valve in the exhaust air line in order to regulate the amplitude of the NTP by throttling the exhaust air.

Notice: Reduced cross-sections already throttle (observe the nominal di-ameter).

By throttling the exhaust air, the centrifugal force is reduced. The frequen-cy hereby remains almost constant.

Recommendation: Reduce the amplitude only up to approx. 50 %. This can cause start-up problems if below.

Set the mist lubricator to the smallest safely adjustable number of drops while the NTP is running. The NTP is ready for operation only after ad-justment and correct functioning of the mist lubricator.

NetterVibration recommends setting the following number of drops on the mist lubricator depending on the type of NTP:

NTP ... Number of drops

18, 25 1-2 drops/2 min

32 1-2 drops/min

48 2 drops/min

Safety instructions

Permissible operating instructions

Regulation of frequency

Regulation of amplitude

Setting mist lubricator

Recommend-ed number of drops

Start-up and operation

16

Check that the following steps have been carried out:

Screw connections checked before installation?

Desired frequency set on pressure regulator?

Desired amplitude set by throttling the exhaust air?

Mist lubricator set?

After one hour of operation: hose supply connections, fastening screws checked, retightened, if necessary? Then follow the maintenance plan.

Checklist start-up

Maintenance and servicing

17

8 Maintenance and servicing

IMPORTANT

Observe the safety instructions in Ch. Safety, page 5.

To clean the NTP, proceed as follows:

1. Close the supply air and exhaust air openings.

2. Clean the NTP externally with pressurised water.

3. Activate the NTP briefly.

Maintenance of the NTP must be carried out as follows:

Interval Action

After one hour of opera-tion after initial commis-sioning

Check fastening screws.*

Check hose screw connections and hose fittings, retighten if necessary.

Monthly Check fastening screws.*

Check hose screw connections and hose fittings, retighten if necessary.

Check hose supply connections for permeability and kinks. If necessary, clean and and remove kinks.

Check the function of the silencer. Clean silencer.

Check the function of the NTP.

Check the function of the mist lubricator (Content decreases? Number of drops/h?). Refill oil.

Empty the filter of the maintenance unit, if necessary, clean the filter insert (wash out) and replace, if necessary.

* Observe the recommended tightening torques (see Ch. Technical data, from page 7 on).

The maintenance intervals depend essentially on the service life and how clean the drive medium is.

Unfiltered compressed air leads to high wear, silencer clogging or com-plete failure of the NTP.

If you notice loss of performance or standstill of the NTP then have the NTP checked at NetterVibration.

Safety instructions

Cleaning

Maintenance plan

Maintenance intervals

Loss of per-formance

Troubleshooting

18

9 Troubleshooting

In the case of disturbances of the NTP proceed as follows:

Disturbance Possible cause Corrective action

No start Silencer polluted Clean silencer.

Compressed air supply

Check if there is enough pressure at the NTP. Check valve. A 3/2-way valve is recommended, so that the supply line to the NTP is vented.

Cover loose A leaky cover leads to standstill of the NTP.

Tighten screws.

Wire cross-sections Observe recommended cross-sections (see Ch. Technical data, from page 7 on).

Line too long be-tween valve and NTP

Leads to a slow start and an eventual standstill of the piston in the middle position.

If necessary, put controlled 3/2-way air valve before the NTP.

Exhaust air throt-tled too much

Open the throttle valve further. Clean silencer.

Thread of grommet is too long

Check if the housing is deformed. Have NTP

checked for deformed housing by NetterVibration.

Tension during installation

Ensure a flat contact surface.

Rattling Screws loose Checkfastening screws.

Power loss Lubrication is miss-ing

Check the function of the mist lubricator.

NTP polluted Disassemble NTP and clean.

Wear Check function of mist lubricator, replace NTP in the case of excessive wear.

Operating pressure too low

Check pressure at inlet of NTP during operation. Increase operating pressure, if necessary.

Disturbances and causes

Spare parts and accessories

19

10 Spare parts and accessories

Please provide the following details when ordering spare parts:

• required amount

• description and position of spare part

• type of NTP

IMPORTANT

Please observe: Piston and housing are produced pairwise and can only be delivered together.

The following accessories are available for the NTP:

Component Description

Hose material and hose screw connections

For air supply or discharge, available in various qualities and dimensions

3/2-way valves For electrical, pneumatic or manual activation

Throttle check valves For amplitude regulation, manually adjustable or pneu-matically controllable (for remote control)

Maintenance units Filter, regulator and mist lubricator

Netter Electronic Timers Electric or pneumatic, for interval operation

Brackets For quick relocation on containers, etc.

NBS fastening kit Recommended for safe and permanent attachment of the NTP

Following accessories are available:

• NTP L for oil-free operation,

• NTP E for the ATEX area,

• high temperature (HT) and low temperature (NT) versions,

• versions with bronze piston (BK),

• stainless steel versions (NTP S) for use in aggressive atmospheres.

Ordering of spare parts

Delivery pair-wise

Possible accessories

Special mod-els

Disposal

20

11 Disposal

All parts of the NTP must be properly disposed of according to the material specifications. The valid disposal costs of the NTP are available on request.

All parts of the NTP can be recycled.

Material Part

Aluminium Housing, cover, base plate

Steel Piston, impact plate (for NTP B+A)

Stainless steel Screws

Plastics Silencer, grommet, sealings, impact plate (for NTP B+C)

Stainless steel (for NTP S) Housing, cover, base plate

Bronze (for NTP BK) Piston

Disposal costs

Material specifications

Annex

21

12 Annex