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Related Manuals for SELWOOD D75
Summary of Contents for SELWOOD D75
- Page 1 D75 BODY UNIT OPERATOR’S MANUAL Original Instruction Part No. Description 7596092000 D75 Body Unit 2000 RPM. Delivery flange rotated 90 7596092100 D75 Body Unit 2000 RPM. Delivery flange www.selwood.co.uk Manual Part no. 890000940MAN...
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Page 3: Table Of Contents
Table of Contents Contact Details ............2 12.6.2 Suction Line ..............21 Amendment Record ........... 2 12.6.3 Strainer ............... 22 Understanding the Pump’s Curve ....... 23 Associated Documentation ........2 12.7 Pump’s Curve, Efficiency and BEP ......23 Glossary ..............3 12.7.1 Ordering Spares ............ -
Page 4: Contact Details
Table 1: Amendment record, any changes to this manual must be recorded within table. Associated Documentation It is important that associated documentation is understood before using the pump, the latest issues can be found on the Selwood website or by contacting a member of the Selwood team. ▪ D75 Body Unit Parts List ▪... -
Page 5: Glossary
Only the manufacturer’s or factory approved parts should be used when servicing the pump. It is advisable to hold a small stock of spare parts to cover breakdown circumstance, these can be viewed in the body unit’s parts list and purchased from Selwood’s sales team: Telephone: +44 (0) 2380 250137 Enquiries: PumpSalesOffice@Selwood.co.uk... -
Page 6: Introduction
Scope This manual is for installing and maintaining Selwood’s D75 body unit only. This manual is written for units received without a power source, which typically would be an IC (internal combustion) engine or an electrical motor. -
Page 7: Intended Use
Before starting any work, ensure the body unit is isolated from the electrical power supply either by the isolator switch or, by disconnecting the pump at the battery and placing a sign in clear view: ‘DO NOT SWITCH ON, MAINTENANCE IN PROGRESS!’. Selwood pumps have auto start facilities and may receive a start signal at any time. -
Page 8: Manual Symbols
Manual Symbols Comply with literature. Warning: hot surface with risk of burns. Relevant information. Warning: heavy loads. This symbol draws attention to items or work which carry higher risks of injury from lifting. Adhere to local legislation involving lifting in these instances. -
Page 9: Health & Safety
Health & Safety DANGER Non-compliance with this section could result in injury or loss of life. It is the responsibility of the employer to ensure correct PPE and safe working procedures are in place. Full PPE is always recommended, and steel toe cap boots, eye protection (safety glasses), coveralls & high visibility vests are essential. -
Page 10: Personal Protective Equipment (Ppe)
Ensure that coveralls are Selwood pumps substances clean before use. hazardous to health. Safety Glasses Head Protection Eyes must be protected from debris, To protect the head from falling objects or dust, smoke and corrosive chemicals. -
Page 11: Pump Components
Description Shaft end The location where the driver is connected via a coupling; the coupling used is dependent on the application and can be found in the pump’s parts list, if applicable. Contact Selwood for further assistance. Mechanical An almost perfect seal between the worked liquid and pump oils that allows a rotating seal component and stationary component to operate together without overheating. -
Page 12: Separator System
Separator System Step Stage Image The air pump drawers air from the suction tube (white arrows). The worked fluid displaces the removed air. Rising water pushes the ball into the seat. The ball is attached to a peel valve via a connecting rod, which stops worked fluid from passing the air pump (carryover). -
Page 13: Non-Return Valve (Nrv)
Non-return Valve (NRV) The NRV can be found within the delivery chamber, although designs may slightly vary throughout the range, the principles are the same. Suction lift can be affected by a dis-functional NRV, see servicing sections in this manual to address. -
Page 14: Draining Body Unit Compartments
Liquids captive to the pump can be damaging to the environment and must be disposed of in accordance with local law. Drip trays are always recommended when operating & maintaining Selwood pumps. Failure to drain the body unit and delivery pipework in freezing conditions could result in damage to the pump’s casting. -
Page 15: Lifting/Storage/Transportation
Any parts or assemblies with a notable mass are stated within the servicing sections of this manual. When lifting any Selwood products, refer to local legislation and guidance. If in doubt, contact Selwood or a local lifting specialist. All lifting equipment including forklifts must be fully serviced and inspected in accordance with local legislation. -
Page 16: Recommended Lifting Technique
11.1.2 Recommended Lifting Technique CAUTION Adhere to following guidelines when lifting the body unit: ▪ Never in any circumstances allow personnel under suspended loads. ▪ Ensure that lifting equipment can lift the gross weight of the pump. ▪ Ensure all lifting equipment has been inspected and is compliant with local legislation. ▪... -
Page 17: Upon Receipt Of The Body Unit
11.2 Upon Receipt of the Body Unit Although great care is taken to ensure the quality of our product, it is advisable to check the following upon receipt. ▪ Check the body unit for any obvious physical damage to the castings and components. ▪... -
Page 18: Shelf Life
11.4 Shelf Life MUST READ The body unit has a recommended storage limitation of two years before a service is necessary, this is due to the internal parts life expectancy. It is good practice to rotate the body unit’s drive shaft 4 ½ turns every two weeks to stop the seizure of internal components. -
Page 19: Installation And Commissioning
13 for correct oil level), and to ensure that the oil is of the recommended quality and free from contamination. Selwood recommend the use of the following products, which should be applied as per the following table. In some territories, the following grades may be known under different trade names, please contact Selwood if problems occur in identifying the correct product. -
Page 20: Installation Example
12.4 Installation Example If the body unit has been purchased as a single item, this section details some of the necessary installation requirements when coupled with a motor/engine. Step Action Image The skid base is a standard part for supporting the pump’s components, as well as absorbing and dissipating vibrations &... - Page 21 Step Action Image When installing the body unit to a rigid pipework system, at least 2m of flexible armoured pipe should be used on both suction and delivery Fixed pipework system connections. Flexible hose length A space requirement of 1.5 m surrounding the unit for operation and maintenance is recommended.
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Page 22: Maximum Allowable Flange Loads
12.5 Maximum Allowable Flange Loads This section is written in accordance with Annex B, BS ES ISO 5199: 2002, Technical specifications for centrifugal pumps – Class 2. The values given within this section are for pumps with baseplates for standard construction and installation. Excessive forces and moments acting on the pipe flanges can cause misalignment of the body unit and driver shafts, stress upon the body unit’s castings and wear of securing fixings between the base and body unit. -
Page 23: Pipelines
▪ Delivery hose and any associated pipe work should be capable of withstanding the maximum system operating pressure. Selwood recommend the minimum pressure rating of 6 Bar hose. Suction hose should be of the non-collapsible type. ▪ The pipe bore diameter must minimally exceed that of the pump connection and the transition between various pipe sizes must be kept to a minimum. -
Page 24: Strainer
To reduce excessive wear of the pump, it is recommended the vertical distance from the unit’s suction flange centre and the suction lines highest point does not exceed 10 meters. Must not Suction exceed line 10 m. highest point. Suction flange Figure 6: Suction line rise. -
Page 25: Understanding The Pump's Curve
Understanding the Pump’s Curve 12.7 Selwood have a wide range of pumps for all applications and liquids, please speak to a Selwood representative for more information. This section gives a brief overview of the pump’s curve, be aware that the below curves are arbitrary and do not reflect any specific pump;... -
Page 26: The Correct Pump For The System
12.8.1 The Correct Pump for the System A system curve considers the resistance in head between the delivery valve and the end point that the unit must overcome before pumping the fluid. This includes any height rises, friction losses in the pipelines and ancillaries in the system, which can be seen when the flow rate is at zero in the below system curve, this is known as static head. -
Page 27: Npsh Explained
NSPH-R (Net Positive Suction Head Required) is the result of extensive testing of the pump at Selwood’s facilities, this is the minimum suction pressure for the pump to operate correctly. -
Page 28: Body Unit Pre-Operation
Body Unit Pre-operation CAUTION If safety equipment such as protective guards or heat blankets are missing, do not start the pump until replaced. MUST READ Body unit oils should be changed every 250 hours. In no circumstances should this time exceed 500 hours. -
Page 29: Checks Whilst Operating
Step Action Image Ensure drain valves are closed (B) before operation. Open (A). Checks Whilst Operating CAUTION In the event of an emergency, a stopping mechanism must be in place to completely shut the driver down and subsequently the body unit. The pump should only be operated within the speed and pressure limits detailed within section 9. -
Page 30: Blockages
14.2 Blockages DANGER Oil Grade Blockages in the delivery line cause high pressures in the system that can become extremely dangerous to personnel and the pump. Immediately engage the Emergency Stop (which must be installed for the complete pump to be CE compliant) if pipelines are moving erratically or are hot to touch. -
Page 31: Running Dry
14.3 Running Dry Flushing Chamber Mechanical Seal Figure 8: A mechanical seal comprising of two components; a stationary seat pressed into the casting and a rotating spring-loaded actuator that pushes against the seat. Both have highly polished silicon carbide surfaces which are in constant contact, this creates a seal between the worked liquid and the oil filled chambers of the body unit. -
Page 32: Periodic Maintenance
500 hours. Liquids captive to the pump can be damaging to the environment and must be disposed of in accordance with local law. Drip trays are always recommended when operating Selwood pumps. MUST READ Engine periodic maintenance must be carried out in accordance with instructions given in the manufacturer’s manual. - Page 33 Tasks Reference Daily / Monthly Every 500 section Before use inspection hours (max) ✓ Physical inspection of all pump pipework for damage and secure fitting, including suction and delivery lines. ✓ Heat blanket is present and correctly secure. Inspect the condition of all AV mounts, if used. ✓...
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Page 34: Serviceable Components
Item and kit part numbers are not specified, refer to the body unit’s part’s list found on the Selwood website. Be aware, using inferior parts will shorten the life of the pump. -
Page 35: Fastening Torques
15.2 Fastening Torques MUST READ All securing fixings including nuts, bolts and washers must be to a minimum standard of 8.8 grade steel. When replacing these fixings, do not use inferior grades or aluminium equivalents. Annual inspections/maintenance must include a complete check of all fixings. All fixings, including lifting eyes that are lift critical must be torque tightened regularly, especially prior to a lift. -
Page 36: Trouble Shooting
Trouble Shooting 16.1 Internal Component Recognition Air Pump Actuator & seal. Peel Valve Neck Seal Seals and Carrier Float Coupling Front Wear Plate Lip Seal Carrier Mech Seal Impeller Bearing Bearing Figure 9: Body Unit internal components. 16.2 Performance Drop Symptom Possible Cause Action... -
Page 37: Air Handling Performance & Lubricant Leaks Or Contamination
16.3 Air Handling Performance & Lubricant Leaks or Contamination Issue Diagnosis Image No.No. Pump will not prime Leaking suction pipework. or primes slowly. Tighten clips and replace if necessary. Faulty delivery valve assembly. Inspect there is nothing obstructing the valve closing. - Page 38 Significant worked Mechanical seal or lip seals fluid droplets are damaged. flushing chamber oil levels (B). Significant drop in Potential lip seal failure. bearing housing oil level (A). leaking from Potential lip seal failure. flushing chamber vent Significant amount of It is likely the Separator peel water passes the air valve or float has failed.
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Page 39: End Of Life
End of Life CAUTION Oil Grade Ensure that local legislation is followed when disposing of the pump, this includes environmental and recycling laws. Ensure all lubricants are disposed of in accordance with local laws. Reference engine/motor manual for similar end of life procedures. Before disassembling the pump: ▪... -
Page 40: Vacuum Test
Start the engine/motor until the pump reaches its optimum RPM. Position Selwood gauge kit (2019244000) over the suction tube flange or the coupling flange, the gauge assembly is held in place by the body unit suction. -
Page 41: Major Servicing
Pump servicing must always be carried out in accordance with this manual. Only components supplied and approved by Selwood Ltd should be used. It is advisable to hold a small stock of spare parts to cover breakdown circumstances. Refer to body unit part’s list found on the Selwood website. -
Page 42: Air Pump Assembly
19.2 Air Pump Assembly 19.2.1 Air Pump Suction Valve Step Action Image Loosen clips and remove hose. Remove all fixings securing air pump outer body. Inspect suction valve rubber. Ensure correct orientation of valve. Rotate the shaft to set the actuator piston to top dead centre. - Page 43 Step Action Image Remove fixings securing actuator piston. Use a blunt screwdriver to prise out seal. Inspect and replace actuator valve. Ensure correct orientation. Page 41 of 70...
- Page 44 Step Action Image Inspect the actuator seal, remove the seal if cracks around inner neck diameter exceeds half the thickness of the seal. The seal may need to be cut from the piston. Reposition actuator piston into the vice with the soft jaws.
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Page 45: Air Pump Discharge Valve
Step Action Image Ensure correct orientation. Conical shape 19.2.2 Air Pump Discharge Valve Step Action Image Remove air pump delivery spigot. Inspect exhaust valve and replace if necessary. Reassemble in reverse, see below for valve orientation. Page 43 of 70... -
Page 46: Neck Seal
19.2.3 Neck Seal Step Action Image Remove air pump components in accordance with 19.2. Replace the neck seal if cracks around inner neck diameter exceeds half the thickness of the seal. Radial cracks appear throughout the seals life; these can be ignored. To replace neck seal, remove inner body. -
Page 47: Air Pump Drive Rod Assy & Bearing
19.2.4 Air Pump Drive Rod Assy & Bearing Step Action Image Remove components in accordance with sections 19.2.1. Remove neck seal in accordance with section 19.2.3. Remove pedestal. Remove locating pins and store for later assembly (highlighted). Remove circlip. Remove seals and carrier. Use tool 0015168000 to push linear bearing out. - Page 48 Step Action Image New linear bearing must be flush with pedestal surface. Use oil on the outer surface to assist when pressing. Press new wiper seal to seal housing with tool 0010103000. Ensure correct orientation (below). Refit seals, carrier and circlip in reverse. Ensure correct orientation (below) If the linear bearing has been replaced, it is likely the air pump drive shaft needs replacing.
- Page 49 Step Action Image Press fulcrum pin to release drive rod. New pin can be fitted with grease and refit circlips. Inspect the connecting rod and its bushes. If these are damaged, then they must be replaced. This is not within the scope of this manual. Refit new gasket.
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Page 50: Refitment Of Air Pump
19.2.5 Refitment of Air Pump Step Action Image Refit air pump lower half. Ensure washers are still in place within recess (highlighted). Grease actuator bore (white arrow) and apply soft soap to the outer surface of seal (black arrow). Secure actuator in position, ensure Belleville washer orientation (below) and tighten cap screw to 56 Nm. - Page 51 Step Action Image Lightly tap the actuator seal around the edges to fully fit. Refit top cap casting and cross tighten fixings to fully secure. Inspect and refit/replace pipework. Ensure clips are secure and air cannot leak. Page 49 of 70...
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Page 52: Volute Removal & Refitting
19.3 Volute Removal & Refitting 19.3.1 Removal Step Action Image Drain the flushing chamber in accordance with section 10.2. Loosen clips and remove hose. Support the body unit under the bearing housing in accordance with local lifting laws and workshop procedures. -
Page 53: Refitting Of The Volute
19.3.2 Refitting of the Volute Refit in the reverse of the removal procedure, be aware of the following: Step Action Image Inspect that all ‘O’ rings, shims and gaskets are in good condition; replace if necessary. Ensure that volute ‘O’ ring is seated within its groove and does not pinch. -
Page 54: Wear Plates
19.4 Wear Plates MUST READ If the pump’s efficiency has dropped, wear plate to impeller gaps may be too high. If this is the case, shims can be removed to decrease the gap. If shims cannot be removed or the wear plates or impeller are excessive worn, then replace components. - Page 55 Step Action Image If fitting a new wear plate, remove wear plate securing fixings. If adjusting shims, refer to step Remove separator if wear plate is stuck to lever wear plate free. When fitting new wear plate: Thoroughly clean wear plate and volute. Lightly grease wear...
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Page 56: Fron Wear Plate
19.4.2 Fron Wear Plate Step Action Image Remove Volute in accordance with section 19.3 to inspect front wear plate gap. If gap is excessive the impeller or mechanical seal hosing may need replacing. To remove mechanical seal and impeller, see section 19.5.1. Replace mechanical seal housing if necessary. -
Page 57: Impeller & Mechanical Seal
19.5 Impeller & Mechanical Seal 19.5.1 Removal Step Action Image Remove volute as per section 19.3. Release the impeller cap screw. Remove impeller, mechanical seal rotary parts and associated components. The impeller key may come free with the impeller. Impeller washer (A) is bonded in position to the impeller with ‘Loctite 601’. -
Page 58: Fitment
19.5.2 Fitment CAUTION Oil Grade Handle the new mechanical seal components with great care, do not touch the highly polished silicon carbide seal faces, these must only contact soft, clean paper that is free from abrasive materials. Premature seal failure is likely to occur if this advice is not heeded. Do not delay assembly once a component has been lubricated. - Page 59 Step Action Image Fit tool bolt to shaft thread. Tighten assembly tool bolt to press stationary seat, wind the bolt back off and let the rubber bed for 17 seconds. Retighten the bolt to ensure the stationary part is fitted correctly within the recess.
- Page 60 Step Action Image Ensuring the silicon carbide mating faces are free from contaminants (Loctite 7063 can be used). Use a clean blue roll to apply four small drops of oil to highly polished face, as seen. Slide impeller onto shaft, taking extreme care not to damage or contaminate seal face.
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Page 61: Impeller End Lip Seals
19.6 Impeller End Lip Seals 19.6.1 Remove of Lip seals Step Action Image Remove volute as per section 19.3 Remove impeller & mechanical seal as per section 19.4 Remove mechanical seal housing. Remove four cap screws and spring washers, and withdrawer seal retainer complete with seals. - Page 62 Step Action Image Replace locating dowl pin and ‘O’ ring. Lightly grease over ‘O’ ring. Inspect shaft sleeve sealing surface and ‘O’ ring for damage and replace if necessary. White arrow indicates ‘O’ ring groove. If replacing sleeve, lightly oil bore with oil and take care not to pinch the ‘O’...
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Page 63: Separator Assembly
Step Action Image Carefully replace lip seal carrier assembly, ensuring dowel pin locates in body unit casting. Refit cap screw bolts & washers and cross tighten and torque to 11 Nm. Refit mechanical seal housing with new ‘O’ ring. Lightly grease ‘O’ ring to assist fitment. Refit components in accordance with section 19.5.2. - Page 64 Step Action Image Remove top cap & float assembly. Note orientation of float. Release locknut and unscrew float. Warning: do not allow operating rod to rotate, this will cause damage to peel valve. Upon refitting, ensure the float’s correct orientation and exchange the gasket if necessary. Page 62 of 70...
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Page 65: Peel Valve
19.7.2 Peel Valve Step Action Image Remove float as per section 19.7.1. Remove upper diffuser assembly and slide upper diffuser off operating rod. Prise free as secured with sealant. Remove screws and clamp bars retaining peel valve to port plate. Remove screws, nuts and clamp bars securing peel valve to operating plate. - Page 66 Step Action Image Remove any remaining sealant. Use soapy water to clean the port plate, ensure no contaminants prevent the peel valve sealing. Secure one side of the new peel valve with clamp bar. Secure other side of peel valve with other clamp bar.
- Page 67 Step Action Image Fit the peel valve to the port plate in reverse. Highlighted fixings are to be secured with ‘Loctite 572’ or equivalent. Do not overtighten screws as this may distort the peel valve. Apply ‘Loctite 518’ sealant or equivalent around the face of the port plate, to create a seal between the top cap.
- Page 68 Step Action Image Tighten locking nut. Refit assembly in reverse. Inspect gasket and replace if necessary. Page 66 of 70...
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Page 69: Delivery Valve Assembly
19.8 Delivery Valve Assembly Step Action Image Remove fixings securing valve body and lift free. Inspect gasket and replace upon reassembly. Disassemble fixing securing the valve. Replace delivery valve if damaged in any way. Upon reassembly, ensure clamp bar is correctly fitted, with the curved edge towards valve rubber. -
Page 70: Assembly Tools
Assembly Tools To order replacement tool(s)/part(s) please contact Chandlers ford’s Sales office on: Phone: +44 (0)2380 250137 Email: PumpSalesOffice@Selwood.co.uk 20.1 Tooling Always use specialised fitment tools where appropriate to stop the destruction of components upon assembly. It is recommended to purchase a complete set of tools from the table below. -
Page 71: Declaration Of Incorporation
Declaration of Incorporation This product complies with the following Essential Health and Safety Requirements of Directive 2006/42/EC Annex 1. These are applied and fulfilled as appropriate: 1.1.3, 1.1.5, 1.2.4.4, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.7, 1.4.2.1, 1.5.5, 1.5.13, 1.6.1, 1.6.2. 1.6.5, 1.7.1, 1.7.2, 1.7.4. Presumption of conformity with the above listed EHSRs is by application of relevant parts of the following standard: EN 809:1998 + A1:2009. -
Page 72: Notes
Notes Page 70 of 70...
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