Agitator Selection

May 1997

Process Industry PracticesMachinery

PIP RESM001Specification for Agitators

PURPOSE AND USE OF PROCESS INDUSTRY PRACTICES

In an effort to minimize the cost of process industry facilities, this Practice hasbeen prepared from the technical requirements in the existing standards of majorindustrial users, contractors, or standards organizations. By harmonizing these technicalrequirements into a single set of Practices, administrative, application, and engineeringcosts to both the purchaser and the manufacturer should be reduced. While this Practiceis expected to incorporate the majority of requirements of most users, individualapplications may involve requirements that will be appended to and take precedence overthis Practice. Determinations concerning fitness for purpose and particular matters orapplication of the Practice to particular project or engineering situations should not bemade solely on information contained in these materials. The use of trade names fromtime to time should not be viewed as an expression of preference but rather recognizedas normal usage in the trade. Other brands having the same specifications are equallycorrect and may be substituted for those named. All practices or guidelines are intendedto be consistent with applicable laws and regulations including OSHA requirements. Tothe extent these practices or guidelines should conflict with OSHA or other applicablelaws or regulations, such laws or regulations must be followed. Consult an appropriateprofessional before applying or acting on any material contained in or suggested by thePractice.

©Process Industry Practices (PIP), Construction Industry Institute, TheUniversity of Texas at Austin, 3208 Red River Street, Suite 340, Austin,Texas 78705. PIP member companies may copy this practice for their internaluse.

Not printed with state funds

May 1997

Process Industry Practices Page 1 of 14

Process Industry PracticesMachinery

PIP RESM001Specification for Agitators

Table of Contents

1. Introduction ..................................21.1 Purpose ..............................................21.2 Scope .................................................21.3 Vendor’s Quotation .............................2

2. References....................................22.1 Process Industry Practices ..................22.2 Industry Codes and Standards ............3

3. Definitions.....................................3

4. Design and Manufacture..............34.1 General...............................................34.2 Materials .............................................44.3 Agitation Assemblies...........................44.4 Steady Bearing ...................................64.5 Shaft Sealing System..........................64.6 Agitator Support ..................................74.7 Shaft Couplings and Guards ...............84.8 Gear Reducer .....................................84.9 Drive Motor .......................................104.10 Auxiliary Piping ...............................11

5. Inspection...................................11

6. Testing........................................116.1 Mechanical Test ............................... 116.2 Noise Level Measurement ................ 116.3 Optional Tests .................................. 12

7. Preparation for Shipment..........127.1 Preservation ..................................... 127.2 Cleaning and Painting....................... 127.3 Packing and Tagging ........................ 12

8. Vendor’s Data.............................138.1 Proposal ........................................... 138.2 Approval Drawings............................ 148.3 Final Data......................................... 14

Data SheetsAgitator/Mixer Data Sheet

PIP RESM001Specification for Agitators May 1997

Page 2 of 14 Process Industry Practices

1. Introduction

1.1 Purpose

The purpose of this Practice is to provide designers and vendors with mechanicalrequirements for design and manufacture of permanently mounted agitators for use inprocess facilities.

1.2 Scope

This Practice covers the minimum requirements for design and manufacture ofpermanently mounted, top and bottom-entering agitators, both with and withoutmechanical seals.

This Practice does not cover requirements for tank mixers, portable and clamp-on,light duty agitators, in-line and jet-type mixers, and high speed dispersers. ThisPractice also does not cover requirements for the installation of agitators.

A typical agitation process data sheet, included with this Practice, may be used tocommunicate purchaser requirements, however, supplemental information may benecessary to fully define process requirements.

1.3 Vendor’s Quotation

1.3.1 Vendor’s quotation shall conform to this Practice and purchaser’s addenda. Atthe vendor’s option, an alternate quotation may be offered if the following twoconditions are met:

a. If there is significant process or delivery advantage, a superior, morereliable agitator design may be offered. Vendor shall provide thetechnical justification.

b. Alternate quotation shall indicate deviations from the requirements inthis Practice. Complete details of deviations shall be submitted topurchaser for review.

1.3.2 If vendor’s quotation indicates no deviations from the requirements in thisPractice, it shall be assumed by the purchaser that the agitator quotedcomplies fully with this Practice.

2. References

Applicable requirements in the latest edition (or the edition indicated) of the following industrystandards shall be considered an integral part of this Practice:

2.1 Process Industry Practices

• Process Industry Practices (PIP)/American Petroleum Institute (API)

– PIP REIE 686/API RP686 - Guidelines for the Pre-Installation Design andthe Installation of Machinery

PIP RESM001May 1997 Specification for Agitators


2.2 Industry Codes and Standards

• American Gear Manufacturers Association (AGMA)

– AGMA 2000 - Gear Classification and Inspection Handbook

– AGMA 6010-E - Spur, Helical, Herringbone, and Bevel Enclosed Drives

• American Society of Mechanical Engineers (ASME)

– ASME B1.1 - Unified Inch Screw Threads (UN and UNR Thread Form)

– ASME B16.5 - Pipe Flanges and Flanged Fittings (Steel)

– ASME B16.47 - Large Diameter Steel Flanges

• American Society for Testing and Materials (ASTM)

– ASTM A269 - Specification for Seamless and Welded Austenitic StainlessSteel Tubing for General Service

• International Organization for Standardization (ISO)

– ISO 1940 Balance Quality of Rotating Rigid Bodies

3. Definitions

For the purposes of this Practice the following definitions apply:

Auxiliary Piping Systems: Piping supplied with the agitator for services such as: seal flush orbuffer fluid, cooling water, gear reducer lubrication oil, and instrument air or nitrogen

Bearing Speed Factor (ndm): An approximation of the speed at which the surfaces of a rollingelement bearing roll together, and therefore also an indicator of bearing service severity. Thebearing speed factor is determined by multiplying the rotational speed in revolutions per minutetimes the bearing pitch diameter in millimeters. For convenience, the pitch diameter is taken asone half the sum of the bearing bore and outside diameters.

Shrink Disc: Clamping assembly used to secure mechanical shaft seals against rotation onshafts. A shrink disc utilizes a bolted wedge assembly to maintain a friction fit to the shaft.

Comment: Use of a shrink disc imposes lower stresses on a shaft than key drives, and doesnot damage the shaft surface like setscrew drives.

4. Design and Manufacture

4.1 General

4.1.1 Agitators shall be complete, including drive motor, gear reducer, forcedlubrication system (if required) for gear reducer, mounting flange, couplingand guard, shaft, agitation elements, and shaft sealing system. Scope of supplyshall conform to the data sheet.

4.1.2 When specified, agitator shall be shop assembled before shipment.Disassembly for shipment shall be limited to that required for shipment,



rigging, storage, or installation. Components disassembled for shipment shallbe clearly matchmarked for reassembly.

4.1.3 Agitators shall be designed for rapid and economical maintenance.4.1.4Agitators shall be designed so that maintenance and disassembly can

be performed with standard shop tools. Any special tools or fixtures requiredshall be listed in the vendor’s proposal.

4.1.5 Oil fill openings, grease points, and mechanical seal reservoir fill port shall beextended for access without disassembly.

4.1.6 Rabbetted fits or dowels shall be used for alignment for all coupling, adapterhousing, and gear casing joints.

4.1.7 Internal agitator components shall be designed to fit through the vesselmanhole openings. Vendor shall state the minimum manhole opening requiredfor assembly and maintenance of internal components.

4.1.8 Vendor shall review and comment on purchaser-supplied process performancedata, including efficiency, performance, and baffle size and placement.

4.1.9 Vendor shall review and comment on the installation details with respect toagitator mounting and maintenance accessibility of the agitator.

4.1.10 Vendor’s proposal shall state expected sound pressure levels in dB for eachoctave band. Agitator noise level shall not be higher than specified on thepurchaser’s noise data sheet.

4.1.11 Vendor shall state in the proposal if external cooling or forced lubrication isrequired for the gear reducer, shaft seal, or steady bearing. Cooling waterrequirements shall be stated in the proposal.

4.1.12 Cooling water passages in heat exchangers or cooling jackets shall be designedfor 7.0 barg (100 psig) minimum working pressure.

4.2 Materials

4.2.1 Material of minor parts (e.g. bolting, shaft keys, and other attachmenthardware) in contact with the process shall have a corrosion resistance equalto or better than that of material of major parts in the same environment.

4.2.2 Material of pressure-containing parts in contact with the process shall have acorrosion resistance equal to that of the vessel.

4.2.3 Unless otherwise specified, components in contact with the mechanical sealflush or buffer fluid shall be AISI 300 series stainless steel.

4.3 Agitation Assemblies

4.3.1 Shaft shall be designed to resist torsional loads and bending moments for allspecified operating conditions, including cold startup.

4.3.2 Unless otherwise specified, shaft shall have a removable coupling spacer sothe shaft seal can be replaced without removing the drive or the agitator shaft.



4.3.3 Shaft shall be equipped with a removable collar or sleeve that supports theentire shaft assembly when the coupling spacer is removed. Coupling andsupport sleeve design shall be such that when the coupling bolts are loosened,the support sleeve supports the shaft automatically.

4.3.4 A dynamic analysis of the shaft assembly shall be performed for both dry andwet conditions, and the results included as part of the vendor’s proposal. Thisanalysis shall verify that any lateral or torsional resonances are separated fromthe operating speed range by at least 20% of the normal operating speed. Also,these resonances shall not be within 10% of any agitator vane passfrequencies, (including baffle effects), or electrical excitation frequencies, suchas those caused by variable frequency drives.

4.3.5 Shaft assemblies that operate at more than 100 RPM and less than 300 RPMshall be statically balanced to the purchaser’s tolerance.

4.3.6 Shaft assemblies that operate at 300 RPM or higher speed shall bedynamically balanced to G40 tolerance in accordance with ISO 1940.

4.3.7 With the agitator drive input shaft turned by hand, runouts of the assembledshaft and agitation elements shall not exceed the following limits of totalindicator runout (TIR):

a. 0.05 mm (0.002 in.) at the gear reducer output shaft

b. 0.13 mm (0.005 in.) above and below the mechanical seal housing

c. 0.25 mm/m (0.003 in./ft.) of shaft length measured from the agitatormounting flange at the first in-vessel coupling, at the agitator hubs, andat the shaft end without the support of a steady bearing

d. 0.025 mm (0.001 in.) perpendicular runout at the coupling face

4.3.8 When specified, the shaft shall have extended key seats for adjustment of theagitation elements.

4.3.9 For shafts with multiple agitation elements, the key seats shall becircumferentially staggered around the shaft.

4.3.10 Bolting of agitator blades shall conform to ASME B1.1.

4.3.11 Bolted connections of the agitation elements to the hub shall have a maximumdiametral clearance of 0.8 mm (0.03 in.).

4.3.12 Blades shall be fastened to the hub with a minimum of three (3) bolts. Boltthreaded length in hub and blade joint shall be minimized.

4.3.13 Bolts shall be secured by lockwire or other positive locking method.

4.3.14 Unless otherwise specified, agitator hub-to-shaft attachments shall be keydriven.

4.3.15 Total allowable variation in the radial sweep of the blade tips shall be 13 mm(0.5 in.). Radial sweep shall be measured without use of a steady bearing.

4.3.16 Maximum tolerance for axial location of blades and hubs shall be±13 mm (0.5 in.).



4.4 Steady Bearing

4.4.1 Unless specifically approved by the purchaser, steady bearings shall not beused.

4.4.2 If the use of steady bearings is approved, then the steady bearing design shallconform to the following criteria:

a. Proposals for agitators that have a steady bearing shall includesufficient detail for evaluation of the steady bearing design.

b. Bearing design shall provide sufficient clearance for the differentialradial and axial thermal expansion of the shaft and the bearing support.

c. Bearing support shall have provisions for lateral and axial adjustment ofthe bearing assembly for alignment purposes.

d. Agitator shaft shall have a replaceable sleeve at the bearing. Shaftsleeves for abrasive services shall be hard coated.

e. Bearing shall have a replaceable liner. Unless otherwise specified, linershall be made of glass-filled polytetrafluorethylene (PTFE).

f. Unless otherwise specified, bearing liner and shaft sleeve shall be field-replaceable without removing the agitator shaft or the bearing support.

4.5 Shaft Sealing System

4.5.1 When specified, a sealing system shall be supplied by the vendor.

4.5.2 For toxic fluids, and for flammable fluids with vapor pressure that exceedsatmospheric pressure at operating temperature or maximum ambienttemperature, the shaft sealing system shall have pressurized dual mechanicalseals.

4.5.3 When specified, the sealing system shall have a positive shut-off device thatallows maintenance of the sealing system without clearing the vessel.

Comment: Partial depressuring of the vessel is allowed for maintenance,therefore the positive shut-off device may have a lower pressure rating thanthe actual mechanical seal.

4.5.4 The shaft sealing system shall have the following features:

a. Seals shall be hydraulically balanced design and of single cartridgeconstruction. The inner seal of dual seals shall have a reverse balancefeature designed and constructed to withstand reverse pressuredifferentials without opening.

b. Seal cartridge shall be field-removable without removing the gearreducer or the shaft.

c. Seal cartridge design shall be adequate for stand-alone static benchtesting before installation.

d. Seal cartridges shall be self-venting through the seal circulation returnline. Centerline of the seal flush return port shall be a minimum of3 mm (0.13 in.) above the seal faces.



e. Seal cartridges shall have leak detection port(s). Leak detection portsshall have a tapped connection and shall be permanently labeled bystamping.

f. The rotating seal element shall be setscrew driven. When specified, therotating seal element shall be key or shrink disc driven.

Comment: The use of setscrews to drive large or high pressuremechanical seals requires the use of a large number of setscrews,which creates the possibility of distortion or improper installation ofthe seal due to uneven tightening. Mechanical damage to the shaft andpossibly the shaft O-rings can result from the setscrews upsetting theshaft metal when tightened. The use of key or shrink disc driven sealelements eliminates these possible problems.

g. Pressure joints in the seal cartridge housing shall be sealed withO-rings. Use of gaskets is prohibited.

h. Unless otherwise specified, the seal cartridge shall not have coolingjackets.

i. Dual seals shall have a seal reservoir with a minimum capacity of 12liters (3 gallons).

j. Seal reservoir shall have a level gauge, a fill connection, and vent anddrain connections. Level gauge shall be sized to indicate a range of ±50mm (2 in.) of normal operating level.

k. Systems with dual seals shall have a device that provides positivecirculation of buffer fluid from the seal reservoir to the seal. Circulationdevice can be a pumping ring or a separate circulation pump.

Comment: When a dead-ended seal lubrication system is specified, acooling jacket may be required, and a circulation device is notnecessary.

4.5.5 An anti-friction bearing shall be mounted in or near the mechanical sealcartridge to minimize shaft motion at the seal. For continuous service, thebearing shall have a minimum L10 life of 40,000 hours. Calculation of bearinglife shall be based on the specified operating conditions.

4.5.6 When specified, a separate lifting device for seal maintenance shall beincluded in the vendor’s proposal.

Comment: A separate lifting device for mechanical seal maintenance(usually a small bolt on trolley and hoist assembly) is recommended if nopermanent overhead lifting capacity is available and the weight of any itemin the seal system exceeds 20 kg (45 lb.).

4.6 Agitator Support

4.6.1 Unless otherwise specified on the data sheet, agitators shall be equipped with athrough-bolted connection flange with dimensions, drilling, and pressure ratingin accordance with ASME B16.5 or ASME B16.47, whichever applies.Connection flange bolt hole orientation shall match vessel flange.



4.6.2 Agitators shall be supported on the vessel nozzle.

4.7 Shaft Couplings and Guards

4.7.1 The coupling between the motor and gear reducer shall be of non-lubricatedflexible design.

4.7.2 Coupling service factor shall be a minimum of 2.0 based on the motornameplate power.

4.7.3 Couplings for motors 35 kW (50 hp) and larger shall be flexible disk type.

4.7.4 Couplings for gear reducer output shaft and agitator shaft shall be of rigiddesign.

4.7.5 Unless otherwise specified, agitator shaft coupling hubs shall be keyed orwelded in place and the arrangement indicated on the outline dimensiondrawing. Threaded coupling mounts are prohibited.

4.7.6 When specified, shaft ends for agitator shaft coupling hubs shall be taperedfor ease of disassembly.

Comment: Tapered coupling hubs are used at coupling joints where thecoupling must be easily field removable and also have a moderateinterference fit to transmit torque. The coupling located just above themechanical seal is an example of this.

4.7.7 When interference fits are specified, cylindrical bore couplings shall bemounted using an interference fit of 0.0005 mm/mm (0.0005 in./in.) of shaftdiameter.

4.7.8 A coupling guard shall be supplied for the motor driver coupling area.Coupling guard shall be removable and shall be mounted so that the rotatingparts are covered to within 13 mm (0.5 in.) of the stationary housings. Guardshall be rigid enough so that contact of the guard with moving parts does notoccur as a result of bodily contact with the guard.

4.8 Gear Reducer

4.8.1 General

4.8.1.1 Gear reducer shall be specifically designed for agitator service.

4.8.1.2 Output shaft and bearings shall be designed to support the weight ofthe agitator assembly.

4.8.1.3 Gear reducer shall be designed to withstand all torsional, bending,and thrust loads so that significant deflections are not transmitted tothe gears and bearings.

4.8.1.4 Gear reducer shall be furnished in accordance withAGMA 6010-E.

4.8.1.5 Gears shall be spiral bevel and/or helical. Use of worm gears,hypoid gears, double helical, or herringbone gears is prohibited.



4.8.1.6 Minimum gear reducer service factor shall be 1.4. For services inwhich polymerization or solidification is possible in the vessel, gearreducer service factor shall be 2.0, as a minimum.

4.8.1.7 Gears shall be finished to Quality Level 9, as a minimum, inaccordance with AGMA 2000.

4.8.1.8 For continuous duty agitators, gear reducer anti-friction bearingsshall be designed for an L10 life of 40,000 hours. Loads on bearingsshall be based on nominal driver rating and agitator shaft loadstransmitted to the gear reducer.

4.8.1.9 Thermal rating of the gear reducer shall be calculated in accordancewith AGMA 6010-E using a factor of 0.75 for the ambient modifier,T4.

4.8.2 Cooling/Lubrication

4.8.2.1 When the driver nominal nameplate power exceeds the thermalrating of the gear reducer, an external cooling system shall beprovided.

4.8.2.2 Preferred cooling system shall consist of ducting and a fan mountedon the input shaft. When fan cooling is insufficient, forced-oilcirculation through an external cooler shall be provided.

4.8.2.3 Forced-oil circulation system components shall include:

• Replaceable element filter

• Motor-driven oil pump

• Cooler (water or air cooled)

• Pump discharge pressure gauge

• Low oil pressure alarm switch

• Sump and cooler exit temperature gauges

• Stainless steel piping.

4.8.2.4 Gear reducer lubrication system shall be designed to operateautomatically without operator intervention.

4.8.2.5 All gears shall be lubricated with oil.

4.8.2.6 Low speed bearings with a speed factor (ndm) less than 150,000may be grease-lubricated. Sealed-for-life bearings are unacceptable.

4.8.3 Gear Reducer Housing

4.8.3.1 Gear reducer housing shall have lifting lugs sized and located to liftthe agitator assembly for installation and maintenance.

4.8.3.2 Housing shall have an oil level sight glass. Normal oil levels forstatic and operating conditions shall be plainly marked on thehousing.



4.8.3.3 Housing shall have a gear reducer nameplate securely attached onits exterior. Nameplate shall be made of 300 series stainless steeland shall be attached with corrosion resistant fasteners.

4.8.3.4 Nameplate shall have the following information permanentlymarked on it:

a. Size and type or model

b. Rated power

c. Service factor

d. Ratio

e. Input and output RPM

f. Manufacturer’s name

g. Serial numberh. Purchaser’s equipment number

4.8.3.5 Housing shall have rotation arrows cast or attached with corrosionresistant fasteners. Arrows shall indicate direction of rotation ofinput and output shafts.

4.9 Drive Motor

4.9.1 Drive motor shall have a 1.15 service factor.

4.9.2 Motor nameplate power shall not be less than 115% of maximum agitatorpower requirements, including drive losses. Motor service factor shall not beused to meet this requirement.

4.9.3 Vertical motors shall have a rain shield.

4.9.4 Motor shall be mounted on a rigid bracket attached to the gear reducer.

4.9.5 Foot mounted motors shall have stainless steel shims with a minimumthickness of 3 mm (0.125 in.) to support the motor feet. The shim pack shallconsist of no less than three and no more than five shim pieces.

4.9.6 The agitator motor mounting adapter runouts for flange mount motors shallnot exceed 0.05 mm (0.002 in.) concentricity (radial runout) and 0.13 mm(0.005 in.) perpendicularity (face runout) as measured from the gear reducerinput shaft.

4.9.7 When specified, positioning screws to aid in driver alignment shall beprovided for both foot and flange mount motors. For foot mount motors,horizontal positioning screws for both transverse and longitudinal directionsshall be provided. For flange mount motors, positioning screws to adjustmotor alignment in two directions normal to the shaft axis shall be provided.Any part of the positioning screw assembly above the plane of the mountingsurface shall be removable without cutting, burning, or grinding.

4.9.8 The motor shall be provided with a grounding lug on the frame.



4.10 Auxiliary Piping

4.10.1 Piping connections to purchaser systems 3/4 NPS or larger shall be flanged.

4.10.2 Piping components in contact with the mechanical seal flush fluid shall bestainless steel.

4.10.3 Seal flush system shall be stainless steel tubing that conforms to ASTM A269.Minimum size of tubing shall be 1/2 in. Use of 3/4 in. tubing is preferred.

5. Inspection

5.1 Purchaser will specify the minimum requirements for inspection in the purchase orderor a separate addendum to the data sheet.

5.2 When specified on the data sheet, inspection shall be conducted by the purchaserbefore the agitator is shipped.

5.3 Purchaser shall have access to inspect the agitator, or any of its auxiliary systems, atany time during their fabrication or testing.

5.4 Vendor shall notify the purchaser a minimum of five (5) days before any scheduledshop tests and before the equipment is to be ready for final inspection.

6. Testing

6.1 Mechanical Test

6.1.1 The purchased motor, gear drive, and mechanical seal assembly shall be givena mechanical run test at the vendor’s facility.

6.1.2 The motor, gear drive, and seal assembly shall be operated at full speed andpartial or no load conditions for one hour after bearing temperatures havestabilized, or for a mutually agreed upon time period.

6.1.3 Dual seal systems shall be operated at normal operating pressure during themechanical performance test.

6.1.4 Bearing temperatures and housing vibration shall be measured and recordedjust prior to the end of the mechanical test.

6.1.5 Bearing temperatures shall not exceed 65°C (150°F). Vibration as measuredat the top of the gear drive shall not exceed 5 mm/sec (0.2 in/sec) RMS.

6.1.6 Shaft runouts at the input shaft and mechanical seal area shall be measuredand recorded on the test data sheets after the mechanical test.

6.2 Noise Level Measurement

6.2.1 When specified, the vendor shall measure and record the noise levelof the agitator during the mechanical test as stated in Section 6.2.1.1through 6.2.1.4.



6.2.1.1 Noise level shall be measured in the horizontal plane at a distanceof 1 m (3 ft.) from the drive motor or gear reducer surface.

6.2.1.2 A survey of the operating agitator shall be made to determine thelocation with the highest noise level. Noise level at this locationshall be recorded.

6.2.1.3 Overall noise level shall be measured and recorded using the “A”weight filter. Frequency analysis of the noise shall be performedusing an octave band filter with center frequencies from 31.5 to 8kHz. Noise levels for each of the octave filter bands shall berecorded.

6.2.1.4 Noise level measurements shall be taken with the sound level meteroperating in the slow response mode and a visual average of themeter fluctuation shall be recorded. Meter shall also be observedoperating in fast response mode with the “A” weight filter. If themeter deflection on fast response is greater than 5 dB, thenmaximum and minimum meter values shall be recorded for eachmeasurement.

6.3 Optional Tests

When specified, optional tests, such as part or full load tests or testing to validateagitation element design, shall be performed.

7. Preparation for Shipment

7.1 Preservation

Interior of the gear reducer shall be treated with corrosion inhibitors in accordancewith PIP REIE 686/API RP686.

7.2 Cleaning and Painting

7.2.1 Exterior surfaces shall be painted with the vendor’s standard paint.

7.2.2 Stainless steel surfaces shall not be painted unless covered by insulation.

7.2.3 Exposed machined surfaces shall be coated with an easily removable rustpreventative.

7.3 Packing and Tagging

7.3.1 Agitator shall be braced and small piping shall be secured to prevent damageduring shipment.

7.3.2 All flanged openings shall be sealed with gaskets and metal covers. Smallpiping shall be sealed with metal or plastic plugs.

7.3.3 Mounting flanges shall be protected with sheet steel covers. Wooden coverswith a minimum thickness of 20 mm (3/4 in.) shall be placed over the steelcovers and shall be secured with a minimum of four (4) bolts.



7.3.4 Special tools and small accessories shall be boxed and shipped with theagitator.

7.3.5 A complete set of installation and operation instructions and a certified outlinedimension drawing enclosed in a waterproof envelope shall be attached to theagitator.

7.3.6 Material shipped separately shall be identified with the purchaser’s itemnumber on a metal tag.

7.3.7 Each separate item, crate, bag, etc., shall be identified with purchaser’s orderand requisition numbers and all special markings specified by the purchaseorder.

8. Vendor’s Data

8.1 Proposal

Vendor shall submit as a minimum the following data with the proposal:

a. Spare parts list with unit pricing for spare parts. Spare parts list shall includeparts required for three years of normal operation and critical startup spareparts.

b. Completed agitator data sheet

c. Preliminary (or typical) outline drawings showing:

• Principal dimensions

• Weights of principal components

• Clearances required for installation and maintenance

• Mounting flange dimensions

• Drive motor support

• Agitator blade-to-hub connection details

• Seal reservoir mounting location

• Direction of rotation when looking at the top of the agitator

d. Typical cross-sectional drawing of the gear reducer showing details ofconstruction

e. Cross-sectional drawing of the shaft seal, with details and specifications of allsealing system components

f. Cross-sectional drawing of the steady bearing (if required)

g. Agitator performance (mixing) calculations and curves

h. Typical schematics for seal flush and lubrication systems

i. A detailed procedure for replacement of mechanical seals

j. Drawings showing the forces and moments applied by the agitator assembly tothe vessel mounting flange



8.2 Approval Drawings

After receipt of the order, vendor shall furnish the following certified drawings:

a. Outline drawing(s) of the complete assembled agitator. Drawing(s) shallinclude:

• Principal dimensions

• Direction of rotation of the agitator

• Size and location of connections to the agitator

• Size and location of mounting flanges

• Total weight and individual weights of principal maintenance items

b. Actual cross-sectional drawings of the gear reducer, shaft sealing system, andsteady bearing

c. Drawings of auxiliary equipment or piping

d. Drawings showing the forces and moments applied by the agitator assembly tothe vessel mounting flange

e. Bill of materials

f. Drive motor data sheet

8.3 Final Data

8.3.1 After final inspection, the vendor shall furnish the following data:

a. As-built data sheets and final drawings

b. Operating and maintenance instructions, including lubricationrequirements, and a detailed procedure for mechanical seal replacement

c. Parts list with factory cross reference number

d. Certified data from the shop tests that were performed. Data shall beprovided for purchaser’s review and acceptance prior to shipment of theagitator.

e. Purchaser specified ducumentation such as material certifications.

8.3.2 The number of copies required will be specified in the purchase order.

Specification for Agitators

AGITATORDATA SHEET

RESM001

PAGE 1 OF 3

JOB NUMBER__________________________________________________________

CLIENT____________________________________________________________

PROJECT LOCATION ________________________________________________

UNIT ______________________________________________________________

ITEM NO _____________________________________________________________

SERVICE _____________________________________________________________

REQUISITION NUMBER _________________________________________________

_____________________________________________________________________

DESIGN, MANUFACTURE, INSPECTION, AND TESTING SHALL CONFORM TO SPECIFICATION

NOTES: ¡ INDICATES INFORMATION COMPLETED BY PURCHASER o BY MANUFACTURER ⌧ BY MANUFACTURER ORPURCHASER

GENERALMIXER MANUFACTURER o MODEL NUMBER o SERIAL NUMBER ¡ QUANTITY

DRIVER ITEM NUMBER ¡ DRIVER TYPE ¡ DRIVER PROVIDED BY

OPERATING CONDITIONS¡ PRESSURE PSIG DIRECTION OF FLUID MOVEMENT

¡ MIXED VOLUME MIN GAL ¡ UP ¡ DOWN

MAX GAL ¡ RADIAL

PERFORMANCEo OPERATING SPEED RPM o MAX SHAFT POWER HP

o CALCULATED PRIMARY PUMPING CAPACITY3

o NORMAL SHAFT POWER HP

o ROTATION o CW o o IMPELLER DIAMETER IN

CONSTRUCTION FEATURESIMPELLER o MANUFACTURER CODE o QUANTITY MATERIALS OF CONSTRUCTION

TYPE ⌧ FLAT ⌧ PROPELLER ⌧ PITCHED ⌧ MULTIPLE ⌧ IMPELLER ⌧ AGITATOR HUBS

o NO BLADES o PITCH ⌧ SHAFT ⌧ BLADES

o RECOMMENDED CLEARANCE FROM OBSTRUCTION IN ⌧ MOUNTING FLANGE ⌧ MECHANICAL SEAL PARTS

o PROJECTED BLADE AREA (IN2) ⌧ GASKET

o THICKNESS (IN) SHAFT SEALS ¡ REQUIRED ¡ NOT REQUIRED

ATTACHMENT o WELDED o BOLTED ¡ POSITIVE LOCK o RATED PRESSURE PSIG o RATED TEMP °F

HUB o FABRICATED o CAST o KEY-DRIVEN o ⌧ PACKING MANUFACTURER/TYPE

SHAFT o HOLLOW o SOLID o STEPPED o FLANGED ⌧ SIZE/NO RINGS

¡ EXTENDED KEY SEATS ⌧ MECHANICAL SEAL TYPE

⌧ STABILIZERS ⌧ BOTTOM STEADY BEARING ⌧ MANUFACTURER

BRG SUPPORTED BY: ¡ VESSEL MFR ¡ AGITATOR MFR ⌧ MANUFACTURER CODE

o SHAFT DIA (IN) o BRG SPAN (IN) ¡ POSITIVE SEAL SHUTOFF FOR MANTENANCE

o CRITICAL SPEED (RPM) ¡ KEY-DRIVEN ROTATING ELEMENT

GEARBOX ¡ SHRINKING-DISC DRIVEN ROTATING ELEMENT

o MANUFACTURER o MODEL NUMBER ¡ MAINTENANCE LIFTING DEVICE

TYPE ⌧ PARALLEL SHAFT ⌧ RIGHT ANGLE ⌧ SEAL RESERVOIR SIZE

o RATED POWER HP o EFFICIENCY % ⌧ COOLING WATER o FLOW o GPM

o AGMA S.F. o AGMA QUALITY o COOLING JACKET

BEARINGS HIGH SPEED LOW SPEED SEAL FLUSH ¡ FLUID

o TYPE ⌧ DEAD ENDED ⌧ FORCED CIRCULATION

o LUBRICATIONTYPE

⌧ PRESSURIZED o PSIG o SOURCE

o AFBMA L-10 LIFE PAINTING

HS COUPLING ¡ MANUFACTURER STANDARD ¡ SPEC NUMBER

¡ INTERFERENCE FIT ¡ ASSEMBLE COMPLETE BEFORE SHIPMENT

⌧ MANUFACTURER ¡ INSPECTION REQUIREMENTS

⌧ MODEL ¡ MECHANICAL TEST ¡ OPTIONAL TEST

LS COUPLING ¡ TAPERED HUBS ¡ INTERFERENCE FIT ¡ FINAL BEFORE SHIPMENT ¡ OTHER

¡OPTIONAL TESTING

¡ PART LOAD ¡ FULL LOAD ¡ NOISE LEVEL

¡ AGITATOR PERFORMANCE ¡ OTHER

MOTOR o MANUFACTURER o MODEL

o TYPE o RPM o FRAME

o HORSEPOWER o FOOT MOUNT o FLANGE MOUNT

REVISIONSNUMBER REVIEWED

DATE APPROVED

ORIGINATOR


AGITATORDATA SHEET

RESM001

PAGE 2a OF 3

JOB NUMBER __________________________________________________________ ITEM NO _______________________________________________________________

VESSEL DETAILS

VESSEL DETAILS ¡ VESSEL ITEM NUMBER TOP HEAD TYPE

¡ SIZE: D/L H (W) FT ¡ FLAT ¡ ASME DISHED ¡ 2:1 ELLIPTICAL

¡ API 620 ¡ ASME SECT VIII ¡ OTHER ¡ CONE ¡ OTHER

¡ INTERNALS BOTTOM HEAD TYPE

¡ CAPACITY GAL/BBL ¡ FLAT ¡ ASME DISHED ¡ 2:1 ELLIPTICAL

⌧ MOUNTING FLANGE SIZE FACING RATING ¡ CONE ¡ OTHER

⌧ SIZE OPENING FOR IMPELLER INSTALLATION IN LOADS

TORQUE STATIC MOMENT DYNAMIC MOMENT WEIGHT

FT-LB FT-LB FT-LB LB

ID DESCRIPTION INCHES REMARKS

A NORMAL LIQUID LEVEL

B MAXIMUM LIQUID LEVEL

C IMPELLER DIAMETER

D IMPELLER DEPTH

E VESSEL REFERENCE DEPTH

F VESSEL I.D.


AGITATORDATA SHEET

RESM001

PAGE 2b OF 3


TANK DETAILS

VESSEL DETAILS ¡ VESSEL ITEM NUMBER TOP HEAD TYPE

¡ SIZE: D/L H (W) FT ¡ FLAT ¡ ASME DISHED ¡ 2:1 ELLIPTICAL

¡ API 620 ¡ ASME SECT VIII ¡ OTHER ¡ CONE ¡ OTHER

¡ INTERNALS BOTTOM HEAD TYPE

¡ CAPACITY GAL/BBL ¡ FLAT ¡ ASME DISHED ¡ 2:1 ELLIPTICAL

⌧ MOUNTING FLANGE SIZE FACING RATING ¡ CONE ¡ OTHER

⌧ SIZE OPENING FOR IMPELLER INSTALLATION IN LOADS

TORQUE STATIC MOMENT DYNAMIC MOMENT WEIGHT

FT-LB FT-LB FT-LB LB

ID DESCRIPTION INCHES REMARKS

A NORMAL LIQUID LEVEL

B MAXIMUM LIQUID LEVEL

C IMPELLER DIAMETER

D IMPELLER DEPTH

E VESSEL REFERENCE DEPTH

F VESSEL I.D.


AGITATORDATA SHEET

RESM001PAGE 3 OF 3


AGITATOR PROCESS DEFINITION

FLUID PROPERTIES, COMPOSITION AND CONDITIONS

FEED COMPONENT RATE(GPM) TEMP (°°F) DENSITY (LB/FT3) VISCOSITY (cP) REMARKS

1

2

PRODUCT

OPERATING TEMPERATURE (°°F) FOAMING TENDENCY VISCOUS PROPERTY MAX. VISCOSITY (cP)

¡ NORMAL ¡ NONE ¡ DILUENT ¡ STARTUP

¡ MINIMUM ¡ MODERATE ¡ NEWTONIAN ¡ INTERMDEDIATE BLEND

¡ MAXIMUM ¡ EXCESSIVE ¡ PSEUDOPLASTIC ¡ FINAL BLEND

¡ TOXICITY ¡ OTHER ¡ UPSET

¡ VAPOR PRESSURE AT OPERATING TEMP

OPERATION (CONTINUOUS RETENTION TIME)

MIXING DURING ¡ FILLING ¡ DRAWOFF ¡ EMPTYING ¡ (MIN.)

PRIMARY BULK FLUID VELOCITY (FT/SEC) ¡ BATCH

¡ REQUIRED o QUOTED ¡ BLEND TIME (MIN)

AVERAGE SHEAR RATE (1/SEC) ¡ TURNOVERS PER HOUR

¡ REQUIRED o QUOTED o MAX ¡ SIZE (GAL) NORMAL

¡ RECIPE (VOLUME/SEQUENCE MIX TIME) ¡ MINIMUM MAXIMUM

PROCESS REQUIREMENTS (COMPLETE ALL THAT APPLY)

¡ BLENDING OF MISCIBLE LIQUIDS ¡DISSOLVING

¡ SOLIDS SUSPENSION ¡ SOLUBILITY ¡ EASY ¡ MODERATE ¡ DIFFICULT

¡ PARTICLE SIZE MICRON ¡ DISSOLVING SOLIDS MAY AGGLOMERATE

¡ WEIGHT % SOLIDS ¡ HEAT TRANSFER

¡ DISTRIBUTION ¡ SERVICE ¡ HEAT ¡ COOL ¡ MAINTAIN TEMPERATURE

NATURE OF SOLIDS ¡ HEAT TRANSFER FLUID

¡ SOLUBLE ¡ INSOLUBLE ¡ ABRASIVE ¡ SPECIFIC HEAT BTU/LB

¡ STICKY ¡ CRYSTALLINE ¡ FLUFFY ¡ CONDUCTIVITY °F

¡ SETTLING VELOCITY (fpm) ¡ DUTY BTU/HR

¡ RESUSPEND AFTER SETTLING REQUIRED ¡ EXTERNAL JACKETS ¡ INTERNAL COIL ¡ TUBE BAFFLES

¡ SOLIDS FLOAT ¡ OTHER

REQUIRE RESULTS ¡ GAS DISPERSION

¡ UNIFORM SUSPENSION ¡ COMPLETE SUSPENSION ¡ SUPERFICIAL GAS VELOCITY FT/SEC

¡ ALL SOLIDS IN MOTION ¡ GASSED/UNGASSED VOLUME RATIO

¡ DISPERSION (NON-MISCIBLE) ¡ REQUIRED RESULTS ¡ COARSE RADIAL DISPERSION

¡ RESISTS WETTING ¡ EASILY WETTED ¡ SMOOTH ¡ FINE BUBBLES

REQUIRED RESULTS o UNGASSED POWER INPUT (HP)

¡ REDUCE AGGLOMERATES TO MICRONS MAX ¡ TWO SPEED MOTOR ¡ INTERLOCK DRIVER TO GAS FLOW

¡ CRYSTALLIZATION ¡ GAS SOURCE ¡ SPARGER RING ¡ INJECTION TUBE

¡ IMPELLER TO SCRAPE SURFACE(S) ¡ FROM EVOLUTION

CRYSTALS ¡ FRIABLE ¡ FORM SLURRY ¡ CHEMICAL REACTION

¡ SETTLE OUT ¡ DEPOSIT ON SURFACE REACTION RATE ¡ RAPID ¡ MODERATE ¡ SLOW

¡ POLYMERIZING ¡ EXTRACTION ¡ LIQUID-LIQUID ¡ LEACHING

¡ SOLIDS FORMATION ¡ WASHING ¡ PARTIPATIVE EXTRACTION

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