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Unistream.estb.com.sg

INSTALLATION, OPERATION & MAINTENANCE
INSTRUCTIONS FOR
EBSRAY MODEL HD600
ROTARY INTERNAL GEAR PUMP
PTY.LIMITED ACN 000 O61 003
PITTWATER
BROOKVALE
AUSTRALIA
PH: (61 2) 9905 0234
FAX: (61 2) 9938 3825
SECTION 1 - GENERAL
INTRODUCTION
1.3 TRANSPORTATION AND PACKING
Standard domestic packing is suitable for shipment in
This leaflet is intended to assist those involved with the covered transports. Ports must be sealed to exclude installation, operation and maintenance of EBSRAY ingress of solids. When received on site the pump should Model HD600 Internal Gear Positive Displacement Pump. The design, materials and workmanship If storage is required for other than a short period prior to incorporated in the manufacture of EBSRAY pumps installation, special preservatives and protective make them capable of reliable operation over a long wrappings will be required. Refer to EBSRAY for details. working life. Correct installation is essential. Service life is enhanced by periodic inspection and careful 1.4 INSPECTION ON RECEIPT - SHORTAGES
On receipt of equipment, check all items against the 1.1 CAUTION
dispatch documents and inspect for damage. Any damage or shortage incurred during transit should be INSTALLATION AND SERVICING OF THIS
noted on the packing note and on both your own and the EQUIPMENT SHOULD BE PERFORMED BY
carrier's copy of the consignment note and a claim QUALIFIED COMPETENT PERSONNEL IN
should be made immediately on the transport company. ACCORDANCE WITH RELEVANT STATUTORY
REGULATIONS OR CODES, IN CONJUNCTION WITH
Should a shortage be evident on receipt, notify EBSRAY THESE INSTRUCTIONS.
immediately giving full details and packing note number. When the equipment supplied utilises components other than those manufactured by EBSRAY e.g. couplings, 1.5 HANDLING
speed reducers, electric motors etc, reference should be Do not drop pump/pumpset Care should be taken in
made to the original manufacturer's data before moving/handling pumps/pumpsets. A sling should be installation or servicing is commenced. Failure to observe placed under or around a pump/pumpset in order to minimise stress on the internal components. The pump/pumpset should be lifted in such a manner as to ensure compliance with the relevant lifting codes. WARNING
Severe internal damage may result if correct
handling and due care is not taken.
The pump must be operated within the original
selected design parameters of speed, temperature,
pressure and viscosity. Should any change be
contemplated, please confer with EBSRAY in order

to verify the suitability of such a change.
SECTION 2 - INSTALLATION
CAUTION
2.2 FOUNDATIONS
INSTALLATION AND REMOVAL OF THIS EQUIPMENT
Baseplate mounted Pumpsets should be accurately SHOULD BE PERFORMED BY QUALIFIED COMPETENT
installed. When on a concrete foundation ensure that it PERSONNEL IN ACCORDANCE WITH RELEVANT
has been poured on a solid footing. NOTE: Position STANDARDS, CODES, REGULATIONS AND SITE
RESTRICTIONS - IN CONJUNCTION WITH THESE

foundation bolts to match baseplate foundation plan. INSTRUCTIONS.

2.3 PUMP PIPING CONNECTIONS
DANGER
NEVER LOOSEN OR REMOVE FITTINGS, FLANGES, ETC.
All piping should be supported independently of and line WHILE UNDER PRESSURE, ALWAYS ISOLATE
COMPONENTS OR PIPEWORK AND DEPRESSURISE
PRIOR TO WORK.
SEVERE DAMAGE COULD RESULT IF PIPING IS
DRAWN INTO PLACE BY USE OF FORCE AT THE
2.1 LOCATION
PORT CONNECTIONS OF THE PUMP.
The pumpset should be placed as close as practicable to the source of supply, keep within the NPSH requirement 2.4 STRAINER PROTECTION
of the pump. Ensure floor area and headroom allotted is sufficient for inspection and maintenance. Allow sufficient The pump inlet should always be protected by an space and ventilation for motor cooling requirements. efficient strainer of adequate size to accommodate the Allow for crane or hoist access if required. liquid viscosity conditions and within NPSHR by the pump 2.5 ALIGNMENT
Alignment of the pump and driver is of extreme importance for trouble-free mechanical operation. EBSRAY mounted pumpsets are accurately aligned at the factory. To ensure this has been maintained during transit, alignment MUST BE checked once before startup and again after the pumpset has been run under actual operating conditions. NOTE: The following procedures are typical only and reference should be made to data for specific coupling types. ANGULAR MISALIGNMENT as shown in Fig.1 should be corrected before eccentricity.Refer Fig.3; Use feeler gauge reading at 90o intervals, the amount of correction necessary can be easily determined to bring shaft axes in line. Misalignment due to ECCENTRICITY as shown in Fig 2 can now be corrected. Refer Fig 4, adjustment by use of shims under the driver or pump will effectively correct error in the vertical plane. Movement of Pump or Driver horizontally will correct error in the horizontal plane. NOTE: If both coupling halves are of identical diameter concentricity may be checked with a straight edge at 90o intervals. SECTION 3 - OPERATION
3.1 DESCRIPTION
balance requiring only minimal torsional load to The EBSRAY Internal Gear principle is based upon the effectively follow the driving Outer Rotor. use of an Outer Rotor 'A', idler gear, termed Inner Rotor 'B' and a crescent shaped spacer 'C' which is cast integral with the Cover. Thus only two moving parts fulfil this efficient displacement cycle. Power is applied to the Outer Rotor 'A' and transmitted to the meshing idler or Inner Rotor 'B'. The rotor teeth cells which are not involved in the meshing cycle are sealed by the crescent 3.2 PUMPING PRINCIPLE
When rotation is started there is an increase in cell volume as the teeth come out of mesh. This creates a partial vacuum and the pressure differential thus created initiates movement of the liquid through the inlet port 'D', filling the teeth cells of the two displacement rotors. When the tooth meshing withdrawal cycle is complete and the tooth cell volume is filled with liquid, transfer to 3.3 APPLICATIONS
the pressure or discharge side is effected as the liquid is carried past the crescent sealing member 'C'. This The field of applications for Internal Gear rotary positive sealing crescent establishes a labyrinth between the high displacement pumps is extensive. These pumps are and low pressure sides, minimising fluid slip. When the used to handle many kinds of liquids over a wide range teeth mesh on the pressure side, the liquid is forced from of capacities and pressures, associated with viscous or the teeth cells and flows through the discharge port 'E'. non-viscous, hot or cold and corrosive or non-corrosive A noteworthy feature of this simple pump principle is the conditions. Accordingly material, speed and power absence of high tooth contact pressures when compared specifications vary and it is important to use such with conventional gear pumps, many of which employ equipment strictly adhering to the manufacturers' costly external timing gears to minimise tooth wear. The Inner Rotor 'B', or idler remains in almost hydraulic 3.4 LUBRICATION
3.6 OPERATIONAL CHECKS
Lubrication of the Inner Rotor bearing and Bracket Inspect pump frequently during the first few hours of Bearing (both are sleeve bearings) is dependent on the operation for such conditions as excessive heating of pumpages' lubricating qualities/material selection of the bearings or stuffing box, vibration, unusual noises etc. The Ball Bearing is lubricated at the time of assembly 3.7 BYPASS VALVE
with a high quality lithium base grease. Replacement of this grease is normally only necessary when major To protect the pump from overpressure due to inadvertent shutting of discharge system, EBSRAY can supply integral or inline Bypass Valves which are capable 3.5 STARTUP CHECKLIST
of circulating the entire pump output. The integral type Bypass Valve is mounted on the pump Cover and bypasses pumpage from the pressure side to the inlet The inline type Bypass Valve is installed in the pump discharge line and normally returns to the inlet side of the pump or back to tank. Fluid temperature will rise if differential pressure is high and recirculating bypass conditions are maintained for extended periods (particularly with integral Bypass Valve). The Bypass Valve should be set on site, in accordance with the predetermined pump and/or system differential pressure required. Refer separate instructions.
Do not start pump against closed discharge valve or with
inlet (suction) valve throttled. Ensure bypass valve (if
fitted) is operational and set to the correct pressure.
Do not exceed system or pump design pressure as
equipment failure could result.Do not run pump dry.
Failure to remove air/vapour could prevent pump
from priming and result in pump damage.

SECTION 4 - MAINTENANCE
CAUTION
PRIOR TO ANY DISASSEMBLY OR SERVICE,
4.2 PREPARATION FOR DISASSEMBLY
VERIFY THAT ALL REQUIREMENTS OF STATUTORY
REGULATIONS OR CODES ARE MET AND THAT

Obtain the appropriate Work Permit if required. SPECIFIC SITE REQUIREMENTS ETC ARE
Isolate pump from liquids in inlet and discharge SATISFIED.
lines, depressurise and purge out any toxic, Some minor maintenance tasks and inspections can be flammable, corrosive or air hardening liquids. performed with the pump 'in line' so long as complete isolation, depressurising and purging procedures have been completed. However for major maintenance it is recommended that the pump be removed from the installation. Mark relevant mating components for correct 4.1 SPARE PARTS
When ordering spare parts, to ensure a minimum 4.3 DISASSEMBLY
of delay and correct replacement to original specification ALWAYS quote the pump Serial Note: Before proceeding, make sure Bracket is firmly Number which is located on the nameplate of the attached to baseplate or bench etc. to avoid overbalancing when rotor is withdrawn. Mark relevant mating components to ensure correct replacement. Advise the name, item number and quantity If fitted, remove Bypass Valve assembly from Cover – Refer Section 5 Remove Lockscrews on both Inner and Outer Release Grubscrews and unscrew Locknut from Remove lubrication/cooling circulation harness .For pumps fitted with EBSRAY Mechanical Seals:
4.4 INSPECTION
Release Mechanical Seal Plate evenly to avoid Inspect components for damage or excessive wear. Note that typical wear of components in EBSRAY's rotary Internal Gear positive displacement pumps tend to Remove access plug and rotate Shaft until Drivescrew is accessible, loosen Drivescrew 2 full compensate each other and working clearances are to some extent maintained by this compensation. If pump performance has been satisfactory, existing components To facilitate removal of Cover, tapped extraction although worn, may still have adequate service life and holes are fitted. Remove Cover assembly complete with Inner Rotor. Care should be taken could be used provided any burrs or sharp edges are to prevent Inner Rotor sliding off Inner Rotor Pin. removed prior to reassembly. Major refurbishing of the pump should be done in line 10. The Rotor/Shaft assembly can now be driven through the pump from the drive end taking care to with reconditioning to an 'as new' status as replacing or repairing one component may have an effect on other components and the working clearances of the pump. 11. Remove Inner Race Lockring and Bracket Ball 4.5 REASSEMBLY- PRELIMINARY
Remove Mechanical Seal components taking care Ensure all parts are clean before assembly. Ensure free running fit of Inner and Outer Press out Inner Rotor Bearing and Rotor Bearing if Fit lip seals to Inner and Outer Lockrings, positioning sealing lip towards Bearing. .For pumps fitted with packed glands:
a) Metallic: Press-fit, ensuring lubrication groove in Standard packed glands require correct grade packing Bearing is in the 12 'O'clock position. If the Bracket for duty. A Lantern Ring is fitted acjacent to the Rotor has a greaser hole, align lubrication groove with Bearing for suction return and relief of packing pressure. the greaser hole and drill through after fitting Bearing. b) Carbon: The recommended method of fitting To facilitate removal of Cover, tapped extraction carbon Bearings is shrink-fitting. Press-fitting complete with Inner Rotor. Care should be taken Bearing. Fit Bearing flush with spigot face, to prevent Inner Rotor sliding off Inner Rotor Pin. ensuring lubrication groove in Bearing is in the 12 'O'clock position. Machine or ream to achieve The Rotor/Shaft assembly can now be driven correct clearance on Shaft ensuring squareness through the pump from the drive end taking care to 10. Remove Inner Race Lockring and Bracket Ball a) Metallic: Press-fit with Bearing flush with one side of Inner Rotor. Using a suitable tool, remove Packing and Lantern ring. Machine or ream to achieve required clearance on Inner Rotor Pin ensuring squareness and Press out Inner Rotor Bearing and Rotor Bearing if TABLE OF CLEARANCES
Ensure all lubrication/cooling circulation a) Axial length of Inner Rotor, Outer Rotor teeth and Cover crescent must be matched to within b) Outer Rotor in Body diametral clearance. Note: Gaskets, Seals and "O"rings at every overhaul, If checking by feeler gauge method, allowance or compensation must be made for eccentricity 4.6 REASSEMBLY (Refer Drg No. CMP051)
ii) Clearances between Shaft and Bracket TORQUE SETTINGS
iii) Lack of Bearing support at drive end To measure clearance, insert feeler gauge at two opposite measurement points 'X1'. Add the two clearances together. This will give the During reassembly, lubrication is required in some
diametral clearance 'X' for the two points. areas. All lubrication in areas where it may come into
contact with pumped product should be with a
product compatible lubricant. The Bracket Ball
Bearing and lockring Seals may be lubricated with

c) To check clearance between Inner Rotor and any high quality lithium base grease suitable for the
Cover crescent, Inner Rotor should be held operating conditions.
(For pumps fitted with SJ Cover Plate only)
Using a new Cover Gasket, locate the SJ Cover Plate on the Cover with the Inner Rotor Pin bores in alignment and temporarily fasten the two together using bolts of the same diameter as the Cover bolts. After fastening Inner Roror Pin (Step 4) remove these temporary bolts. Fit Inner Rotor Pin Gasket to the Inner Rotor Pin locating step. Apply a suitable sealant (e.g. Loctite) to the Inner be tapped on by using a drift on its inner ring. Rotor Pin bore in the cover. Ensure sealant does
Tapping on the outer ring could damage the not enter the Inner Rotor. Press Inner Rotor Pin
into Cover ensuring lubrication groove points 14. Lubricate outer lockring Lipseal and screw Outer centrally towards crescent and adequate support is given around the Inner Rotor Pin bore boss when pressure is applied. 15. Slide Ball Bearing locknut along Shaft through Lipseal and tighten firmly using a suitable tool. Place Inner Rotor Pin Spacer (if fitted) and Inner Rotor Pin Washer over Inner Rotor Pin and lock Inner Rotor Pin Nut securely whilst maintaining 16. Replace lubrication/cooling circulation harness lubrication groove location. Note: Use of a split 17. If fitted, reinstall Bypass Valve – Refer Section 5. Fit Body to Bracket with Gasket between faces. Maintain correct inlet and discharge port 4.7 ROTOR AXIAL CLEARANCE ADJUSTMENT
orientation, securely tighten in a uniform manner. The Inner and Outer Lockrings when finally positioned Insert Rotor/Shaft assembly ensuring Rotor Bearing determine the Bracket Ball Bearing location within the Bracket. As the Ball Bearing is positively locked to the 7. Fit Inner Rotor over Inner Rotor Pin in Cover Shaft shoulder by the Bearing Locknut, the positioning of assembly with flush side towards Cover, ensure the Ball Bearing will control the Rotor axial clearance. Fit Cover assembly to Body with Gasket between faces, make sure the seal land of the Cover a) A crank handle or other suitable arrangement matches with the seal land in the pump Body. (This should be affixed on the coupling end of the seal land is diametrally opposite the centre of the Rotor/Shaft assembly to facilitate rotating of the Cover crescent). Lubricate pump elements through pump port and check that Rotor/Shaft assembly b) Screw Outer Lockring in a clockwise direction whilst simultaneously rotating assembly. This .For pumps fitted with EBSRAY mechanical seals:
enables sensing the rotor-cover point of contact ie. a slight drag is felt by hand. Slide Circlip along Shaft ensuring gap in Circlip lines up with access hole. Take care to avoid c) Mark Outer Lockring position relative to Bracket i.e. establish a datum point for setting axial clearance. 10. Slide Circlip Retainer along Shaft until located against Circlip (a suitable tube may help, keep drive d) Back off Outer Lockring 180 degrees to screw inline with access hole), tighten Drivescrew. 11. Insert Spring, Drivewasher, Rotating 'O'ring, e) Reposition Outer Lockring to a point measured Rotating Face, Stationary Face, Stationary 'O' ring radially from the previously marked datum equal and Mechanical Seal Plate. Note: Particular care to the amount of desired axial clearance. must be taken to avoid contamination of lapped Note: For model HD600 5.14 mm radial movement on
seal surfaces by any foreign matter. All parts should the O.D. of the Outer Lockring equals 0.025 mm axial be lubricated before assembly and Drivepins must be located during assembly. Mechanical Seal Plate movement of the Rotor/Shaft assembly. Refer Table of .For pumps fitted with packed glands:
Example: Standard 'A' clearance 0.13 - 0.18 mm Place Packing rings in position in accordance with normal packing procedures. For standard square Packing with one Lantern Ring, use eight (8) rings is equivalent to 26.7 - 37.2 mm radial movement on the of 12.7mm square Packing. For other types of packing refer to suppliers instructions. 10. Position Gland Plate and tighten by hand only. f) Screw in Inner Lockring to lock hard against ball 11. Final adjustment is carried out during operation of bearing. At this point, check for freedom of pump. Packed glands, when adjusted correctly are rotation of assembly. Axial clearance should designed to have a very small amount of seepage. If packing is too tight it will generate excessive heat, g) Tighten Inner and Outer Lockring Lockscrews. 12. Lubricate Lipseal on Inner Lockring and slide Lockring along Shaft, screw Lockring in until it protrudes approximately 4mm from thread on pump side. 13. Lubricate Bracket Ball Bearing. Fit Bearing to Shaft and drive Bearing into position against Shaft shoulder using a suitable drift. Bearing should only SECTION 5 - INTEGRAL BYPASS VALVES

5.1 GENERAL
It is advised that all gaskets be replaced whenever disassembled. This Bypass Valve is intended for integral installation in EBSRAY's Internal Gear Pumps. The valve is mounted Check Cap, Washer, Adjusting Screw and Locknut in such a manner as to return liquid from the discharge side of the pump to the inlet side of the pump when differential pressure reaches or exceeds a preset level. 5.6 REASSEMBLY
The Bypass Valve is mounted with the Adjusting Screw pointing toward the inlet chamber of the pump. (Refer Drg No. CMP051) 1. Screw Locknut onto Adjusting Screw and then
5.2 OPERATION
2. Fit Valve into Body, ensuring freedom of The BYPASS VALVE is spring loaded and adjustable within a pressure range determined by the actual spring used. EBSRAY can supply a variety of springs to suit varying differential pressures. They are designed for liquid service and to provide pump and drive protection from excessive differential pressures above specified Fit Gasket to Cap, position Cap on Body ensuring that the Adjusting Screw locates in the hole in the Upon commissioning, the Bypass Valve should be adjusted in accordance with the predetermined pump differential pressure required. NOTE This may be achieved easily by screwing the Adjusting Screw all the way in for positioning and then backing off the Adjusting Screw to 5.3 MAINTENANCE
PRIOR TO ANY DISASSEMBLY OR SERVICE,
Fasten Cap to Body by means of four Setscrews. VERIFY THAT ALL REQUIREMENTS OF STATUTORY
REGULATIONS OR CODES ARE MET AND THAT

SPECIFIC SITE REQUIREMENTS ETC. ARE
5.7 ADJUSTMENT
SATISFIED.
NOTE: Final adjustment is carried out after the valve is
Apart from Bypass Valve Body replacement, other maintenance tasks and inspections can be carried out For increased bypass pressure, rotate Adjusting with the Bypass Valve fixed to the pump Cover, so long Screw in clockwise direction ( i.e.screw in ). DO
as complete isolation, depressurising and purging have NOT exceed pump or system design pressure.
For decreased bypass pressure, rotate Adjusting 5.4 DISASSEMBLY
3. Lock Adjusting Screw Lock Nut against Cap immediately after any adjustment is made. 3. Release spring pressure by rotating Adjusting After Adjstment is completed, fit Adjusting Screw Remove the four Setscrews, affixing the Bypass NOTE: Bypass valves characteristically exhibit three distinct differential pressures during their operation : Remove the Cap assembly complete with Adjusting a) The set or 'cracking' pressure which occurs when product initially begins to be bypassed Remove Adjusting Screw and Llocknut from Cap. Remove Spring Cap, Valve Spring and Valve from b) Maximum differential pressure, which occurs when the flow of the bypassed product passes through the bypass valve. 5.5 INSPECTION
c) Full flow differential pressure which occurs Inspect Bypass Valve Body, particularly valve seat, when all the product being pumped passes for damage or wear. If required remove Bypass It is important to ensure the above characteristics are 2. Check Valve for damage or deposits. Clean thoroughly or replace Valve as required. If worn, or understood fully in order to correctly apply and adjust the if seat or Valve is damaged, lap cleaned/replaced Inspect Bypass Valve Spring. Replace if broken or damaged. SECTION 6 - TROUBLE SHOOTING
6.1 PUMP FAILS TO PRIME OR DELIVER LIQUID
6.3 EXCESSIVE POWER CONSUMPTION
1 Differential pressure higher than rating. 2 Liquid properties not as specified - check viscosity. 3 Rotating parts bind - check for proper clearances or a) If motor driven, check speed, line voltage and 4 Bearings worn - inspect and replace as required. b) If engine driven, check governor setting and 5 Obstructions in pipe lines, clogged strainers, partially 4 System discharge head too high - check system head, friction losses and bypass valve setting. 5 Excessive inlet restrictions - check NPSH available (inadequately sized inlet piping may cause high friction losses,vapour pressure of liquid may be too 6.4 PUMP IS NOISY
high). Check with vacuum or compound gauge. 1 Cavitation is taking place - increase NPSH by: 6 Air leaks and/or air pockets in inlet line - check inlet a) Removing inlet line restrictions created by: 7 Bypass valve open due to obstruction under seat of (i) Inadequate pipe sizes / excessive line (ii) Incorrect selection of valves, fittings etc. 8 Inlet filter/strainer blocked or leaking air. (iii) Strainer not permitting free flow of liquid to 9 Pump cannot clear vapour due to excessive b) Increasing static head in supply vessel. 6.2 LOW OUTPUT
2 Rotating parts bind - check for proper clearances. 3 Pump and driver misaligned - check coupling and 2 Entrained air or gases in liquid pumped. 3 Strainer offering excess resistance to flow. 4 Inlet and/or discharge pipes of insufficient diameter, 5 Bypass valve pressure setting too low - Increase pressure by screwing in adjusting screw. DO NOT exceed pump or system design pressure, or overload motor etc. 7 Excess axial clearance setting of rotor to cover. 8 Excess clearances in pump due to wear. SECTION 7 - PARTS DESIGNATION

EBSRAY Internal Gear Pump Model HD600
Refer Drg No.: CMP051

CAT# .DESCRIPTION .QUANTITY
1.Body.1
3.Cover .1
3A .Cover Plate .1
5.Cover Gasket.1
5A .Cover Plate Gasket .1
17.Gland Plate .1
21.Gland Packing .2.14 metres x 12.7mm square
22.Mechanical Seal Rotating Face .1
23.Mechanical Seal Stationary Face.1
24.Mechanical Seal Drive Washer .1
25.Mechanical Seal Spring.1
27.Mechanical Seal Plate .1
29.Mechanical Seal Stationary 'O'ring.1
30.Mechanical Seal Rotating 'O'ring .1
31.Mechanical Seal Circlip .1
32.Mechanical Seal Circlip Retainer .1
36.Outer Rotor on Shaft assembly.1
48.Bypass Valve .1
49.Bypass Valve Body .1
50.Bypass Valve Body Cap .1
50A .Bypass Valve Cap Gasket.1
51.Bypass Valve Spring Cap.1
53.Bypass Valve Spring .1
54.Bypass Valve Lock Nut.1
55.Bypass Valve Adjusting Screw.1
56.Bypass Valve Adjusting Screw Cap .1
56A .Gasket - Adjusting Screw Cap .1
57.Bypass Valve Gasket .2
60.Inner Rotor .1
61.Inner Rotor Bearing .1
62.Inner Rotor Pin.1
63.Inner Rotor Pin Nut .1
64.Inner Rotor Pin Washer.1
64A .Inner Rotor Pin Spacer .1
68.Bracket.1
69.Rotor Bearing.1
69A .Extraction Washer .1
69B .Extraction Washer 'O'ring.1
70.Bracket Gasket .1
74.Bracket Ball Bearing .1
77.Bracket Ball Bearing Inner Lockring.1
79.Bracket Ball Bearing Inner Spacer .1
80.Bracket Ball Bearing Inner Seal .1
81.Bracket Ball Bearing Outer Lockring .1
84.Bracket Ball Bearing Outer Seal.1
85.Bracket Ball Bearing Locknut .1
85A .Tabwasher .1
100.Lantern Ring .1
135.Inner Rotor Pin Gasket .1
NOTE:.This list covers various pump configurations, before ordering parts, please check
the requirements for your particular pump. Ensure that Pump SERIAL No is quoted when ordering parts.

Source: http://unistream.estb.com.sg/admin/pdf/HD600.pdf

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