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Edwards GV Series Instruction Manual Download Page 44

A705-61-880 Issue M

Page 38

© Edwards Limited 2012. All rights reserved.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Maintenance

5.11.2

Fit the new pump-motor

CAUTION

Ensure that the pump-motor flange and the bottom flange of the coupling housing are clean and free of burrs. 
If you do not, the pump-motor and coupling housing may be misaligned and you may damage the pump-motor, 
the pump or the drive coupling when you operate the pump.

Note:

For motor flange compatibility and power, refer to 

Table 4

 and 

5

.

1. Refer to 

Figure 10

. Dispose of the key supplied with the new pump-motor.

2. Inspect the motor shaft (18) of the new pump-motor (19). The motor shaft must be free of burrs and dirt. 

If necessary, clean or refinish the motor shaft.

3. Inspect the motor shaft bore of the drive hub (16). The bore must be free of burrs and dirt. If necessary, clean or 

refinish the bore.

4. Fit the new key (2, supplied in the Motor Fitment Kit) into the motor shaft (18).

5. Ensure that the set screw (4) does not protrude into the bore of the drive hub (16): if necessary, loosen the 

set screw.

6. Fit the drive hub (16) fully on the motor shaft (18). Do not fully tighten the set screw.

7. Ensure that the coupling hub (14) is fully located on the pump shaft (9), against the shaft bearing nut (11). 

If necessary:

Loosen the set screw (5) in the coupling hub (14).

Move the coupling hub so that it is fully on the pump shaft (9), against the shaft bearing nut (11).

Apply a suitable thread sealant (such as Loctite 242 Nutlock) to the set screw (5), then fully tighten it.

8. Slide the holding ring (17) over the coupling hub (14).

9. Inspect the bottom flange of the coupling housing (7) and the flange of the pump-motor (18). The flanges must 

be free of burrs and dirt. If necessary, clean or refinish the flanges.

10. Use suitable lifting equipment to lift the pump-motor off the floor and move it close to the pump.

11. If necessary, fit slings around the pump-motor (18) and attach suitable lifting equipment to the slings. Use both 

sets of lifting equipment to turn the pump-motor so that it is horizontal, with the pump-motor terminal-box at 
the top, and with the drive hub (16) towards the coupling housing (7).

12. Undo and remove the four bolts (13) which secure one of the coupling covers (12) to the coupling housing (7), 

then remove the coupling cover. 

13. Undo and remove the four bolts (13) which secure the other coupling cover (12) to the coupling housing (7), then 

remove the coupling cover. 

14. Move the pump-motor (19) so that the motor flange locates against the flange of the coupling housing (7), and so 

that the bolt holes in the two flanges are aligned.

15. Use the bolts (1) to secure the pump-motor (19) to the coupling housing (7).

16. Loosen the set screw (4) on the drive hub (16), then move the drive hub along the shaft until the gear teeth 

on the drive hub (16) and coupling hub (14) are parallel, and the gap between the teeth on the two hubs is 
2.5 ± 1 mm.

WARNING

Ensure that the pump-motor does not fall when you move it. The pump-motor is heavy 
(see

Section 5.11.1

) and can cause injury to people if it falls.

Summary of Contents for GV Series

Page 1: ...6 61 900 GV250 Dry Vacuum Pump 230 460 V 60 Hz A705 61 908 GV400 Dry Vacuum Pump 230 460 V 60 Hz A707 61 908 GV250 Bareshaft Dry Vacuum Pump 50 60 Hz A705 61 985 GV400 Bareshaft Dry Vacuum Pump 50 Hz A706 11 985 GV250F Bareshaft Dry Vacuum Pump 50 60 Hz A705 15 985 GV400 Bareshaft Dry Vacuum Pump 60 Hz A707 11 986 GV400F Bareshaft Dry Vacuum Pump 50 Hz A706 15 985 GV400F Bareshaft Dry Vacuum Pump ...

Page 2: ...50 Hz A706 61 900 GV400 Dry Vacuum Pump 230 460 V 60 Hz A707 61 908 GV400 Dry Vacuum Pump 200 V 50 60 Hz A707 61 917 to which this declaration relates is in conformity with the following standard s or other normative document s EN1012 2 1997 A1 Compressors and Vacuum Pumps Safety Requirements Vacuum Pumps EN60034 1 1998 Rotating Electrical Machnes Rating and Performance EN ISO 12100 2 2003 Safety ...

Page 3: ...esign 11 3 3 Unpack and inspect 12 3 4 Locate the pump 13 3 5 Check the gearbox oil level 13 3 6 Electrical connections 13 3 6 1 Introduction 13 3 6 2 Connect the electrical supply to the pump motor 14 3 6 3 Connect the thermistor outputs 16 3 6 4 Connect to the thermal snap switches 16 3 7 Check the direction of rotation 17 3 8 Fit a mechanical booster pump optional 18 3 9 Connect the cooling wat...

Page 4: ... Flush the cooling jacket 36 5 10 Replace the interstage relief valve 36 5 11 Replace the Pump Motor 37 5 11 1 Remove the Pump Motor 37 5 11 2 Fit the new pump motor 38 5 12 Replace the coupling insert 41 5 13 Relubricate the motor bearings 41 5 13 1 General requirements 41 5 13 2 Relubrication intervals 42 5 14 Replace the motor bearings 42 5 15 Overhaul the pump 42 5 16 Fault finding 43 6 Storag...

Page 5: ...d oil filler and drain ports 34 9 Relubricate the high vacuum bearings 35 10 Exploded view of the pump motor coupling drive and coupling housing 40 Tables Table Page 1 Operating and storage conditions 5 2 Performance data 5 3 Materials of Construction 6 4 Mechanical data 6 5 Electrical data 7 6 Cooling system data 7 7 Lubrication data 8 8 Shaft seals purge system data 8 9 Connections data 8 10 Noi...

Page 6: ...This page has been intentionally left blank A705 61 880 Issue M Page iv Edwards Limited 2012 All rights reserved Edwards and the Edwards logo are trademarks of Edwards Limited ...

Page 7: ...s The following IEC warning labels appear on the pump The units used throughout this manual conform to the SI international system of units of measurement Where appropriate US equivalent units of measurement are also given 1 2 The GV pumps Refer to Figure 1 The GV pumps are rugged reliable dry vacuum pumps designed for general vacuum use The pump is a three stage positive displacement rotary pump ...

Page 8: ...point 4 Thermal snap switch box 5 Lifting bolt 6 Pump inlet 7 Cooling water inlet 8 Fixing holes 9 Frame 10 Gas ballast flow valve 11 Exhaust purge port blanked 12 Interstage relief valve 13 Pump outlet 14 Oil level sight glass 15 Coupling cover 16 Pump motor 17 Arrow showing motor rotation direction 18 Correct direction of rotation arrow 19 Motor cooling fan 20 Oil drain plug 21 Oil filler plug 2...

Page 9: ...air cooled by an integral cooling fan 19 A thermal snap switch box 4 is fitted to the pump body The snap switch box has two thermal snap switches The output of the warning thermal snap switch will go open circuit when the temperature of the pump body is higher than normal Use this output to provide a warning of high pump temperature The output of the shut down thermal snap switch will go open circ...

Page 10: ...ition for example without damage however the pump is not suitable for continuous pumping of liquids If you want to continuously pump a liquid stream contact your supplier or Edwards for advice 1 8 Safe area operation You must not use the GV pump in the following hazardous areas Zone 0 Zone 1 or Zone 2 gases or Zone Z 10 or Zone Y 11 dusts as classified by European authorities Division 1 or Divisio...

Page 11: ...ion 7 4 4 30 min Area classification in accordance with BS 5345 standard pumps Safe Area designation only Table 2 Performance data GV250 GV400 Maximum pumping speed 50 Hz electrical supply 260 m3 h 1 385 m3 h 1 60 Hz electrical supply 177 cfm 250 cfm Displacement swept volume 50 Hz electrical supply 315 m3 h 1 540 m3 h 1 60 Hz electrical supply 223 cfm 350 cfm Motor rotational speed 50 Hz electric...

Page 12: ...less steel Valve seat Stainless steel Valve pad Stainless steel Ancillary brackets Stainless steel Coolant pipes and fittings Stainless steel Shaft seals Stainless steel PTFE Skids Mild steel Motor fan cowl Mild steel Pump casing blanking plates Mild steel Motor casing Aluminium alloy Coolant inlet strainer Brass O rings Viton Labels Lexan polycarbonate film Interstage pressure relief valve bushes...

Page 13: ...pe Direct water cooling Cooling water supply Supply temperature range 5 to 35 C 41 to 95 F Maximum supply pressure 10 bar 1 x 106 Pa 7500 Torr Maximum required pressure differential across supply and return 2 bar 2 x 105 Pa 1500 Torr Warning thermal snap switch Opening temperature 68 C 154 F Closing temperature 62 C 144 F Shut down thermal snap switch Opening temperature 75 C 167 F Closing tempera...

Page 14: ...Drynert 25 6 Fomblin Y25 6 Krytox 1525 Gearbox oil capacity Minimum 1 4 litres 0 37 US gal Maximum 1 6 litres 0 42 US gal High vacuum bearings Grease type Perfluoropolyether Recommended grease Fomblin RT15 Table 8 Shaft seals purge system data Purge gas Air or nitrogen Regulated pressure of purge to shaft seals 0 35 to 0 5 bar 5 to 7 psi above exhaust back pressure Table 9 Connections data Pump in...

Page 15: ... Fixing holes Ø22 mm 0 9 inch A Dependent on motor fitted i e Bareshaft pump supplied B C D E F G H J K L M 380 400 415 V 50 Hz pump dimensions mm GV250 894 366 148 580 315 1000 640 180 377 460 632 13 GV400 955 414 148 580 315 1000 640 180 377 460 632 13 230 460 V 60 Hz pump dimensions inches GV250 36 96 14 41 5 83 22 83 12 4 34 37 26 22 7 09 14 84 18 11 24 88 0 52 GV400 40 16 15 91 5 83 22 83 12 ...

Page 16: ...A705 61 880 Issue M Page 10 Edwards Limited 2012 All rights reserved Edwards and the Edwards logo are trademarks of Edwards Limited This page has been intentionally left blank ...

Page 17: ...es so that they cannot accidentally trip people Note For Bareshaft pumps see Section 5 11 2 Fit the new pump motor and see Section 2 3 2 4 Table 4 and 5 for required motor specifications 3 2 System design WARNING Obey the safety instructions listed below and take note of appropriate precautions If you do not you can cause injury to people and damage to equipment WARNING Particular caution should b...

Page 18: ... check valves or other components suitable for your application and system design 3 3 Unpack and inspect 1 Use a fork lift truck or a pallet truck to place the pallet in a convenient position 2 Remove the cardboard sleeve which covers the pump then remove the protective foil bag from around the pump 3 Inspect the equipment If the pump or any of the other items is damaged notify your supplier and t...

Page 19: ...ee detail C If necessary pour more oil into the gearbox refer to Section 5 3 3 6 Electrical connections 3 6 1 Introduction Note On 60 Hz pumps you must make the wiring connections in the motor in accordance with the US National Electrical code and with approved local and site practices We recommend that you connect the electrical supply to the pump motor through a suitable current monitor and that...

Page 20: ... suitable cable gland and nut to the entry hole then pass the supply cable through the cable gland The cable gland that you use must be rated to provide seal protection IP55 in IEC529 or NEMA MG1 pt 5 4 Configure any links in the terminal box as necessary then connect the phase conductors and the earth ground wire to the terminals in the terminal box refer to the motor manual supplied with your pu...

Page 21: ...trical connections 1 To your electrical supply 2 Earth ground points 3 Auxiliary contacts 2 off normally closed 4 Fuse or circuit breaker 5 Control voltage 6 Stop control 7 Start control 8 Shut down thermal snap switch 9 Inlet valve control solenoid optional 10 Contactor A Pump motor connections B Control circuit Earth ground points Location Size Thermal snap switch box M4 tapped hole Pump motor ...

Page 22: ... Connect the output of the warning thermal snap switch to your control equipment to provide an indication that the pump is too hot You must connect the output of the shut down thermal snap switch to the electrical overload control loop of your contactor so that the contactor will automatically switch off the pump if it is too hot refer to Figure 3 WARNING Connect the pump motor thermistor outputs ...

Page 23: ...d loop of your contactor 7 Fit the crimp connectors on the remaining pair of wires 6 to the spade terminals 7 on the warning thermal snap switch 8 8 Connect the other ends of the same pairs of wires to the warning circuit of your control equipment 9 Tighten the cable gland 5 to secure the cable in position 10 Refit the cover 2 and secure with the four screws 1 3 7 Check the direction of rotation 1...

Page 24: ...mp fit it now Details of the connection kits available from Edwards are given in Section 7 4 Refer to the installation procedures in the instruction manual supplied with the connection kit Figure 4 Connect to the thermal snap switches 1 Bolts 4 off 2 Cover 3 Thermal snap switch box 4 Four core cable 5 Cable gland 6 Warning wires 7 Spade terminals 8 Warning thermal snap switch 9 Shut down thermal s...

Page 25: ...ing water supply as described below you must use inch outside diameter pipes for the cooling water supply and return pipelines 1 Refer to Figure 1 Remove the red blanking caps from the cooling water inlet 6 and outlet compression connections 2 2 Remove the inch compression nuts and ferrules from the fittings kit and fit them finger tight onto the cooling water inlet 6 and outlet 2 connections 3 Fi...

Page 26: ...e from the fittings kit and fit them finger tight onto the shaft seals purge inlet connection 22 3 Fit the end of your air or nitrogen supply pipeline to the shaft seals purge inlet connection 22 then tighten the nut to secure the pipeline in place 3 10 3 Connect a nitrogen gas ballast supply optional Note Ensure that the gas ballast nitrogen supply is clean and dry Your nitrogen supply pipeline m...

Page 27: ...lanking plate to your pipeline 3 12 Connect the pump outlet CAUTION Install an outlet catchpot to prevent the drainage of condensate back into the pump If you do not condensate which drains back into the pump may damage it or cause it to seize Incorporate flexible bellows in the exhaust pipeline to reduce the transmission of vibration and to prevent loading of coupling joints If you use flexible b...

Page 28: ...rn on the cooling water supply the shaft seals purge air or nitrogen supply the gas ballast nitrogen supply if fitted and your exhaust extraction system Ensure that the pressures and flow rates are as specified in Section 2 4 Check that there are no leaks in the water air nitrogen if fitted and exhaust extraction system connections Seal any leaks found 5 Switch on the pump 6 Check that the pressur...

Page 29: ...trademarks of Edwards Limited Installation A705 61 880 Issue M Figure 5 Exploded view of the gas ballast assembly 1 Gas ballast flow valve control 2 Air filter 3 Co Seal 4 Clamp 5 Gas ballast flow valve 6 Clamp and Co Seal 7 Adaptor 16 to 25 mm 8 Co Seal 9 Clamp 10 Flap valve 11 Elbow ...

Page 30: ...A705 61 880 Issue M Page 24 Edwards Limited 2012 All rights reserved Edwards and the Edwards logo are trademarks of Edwards Limited This page has been intentionally left blank ...

Page 31: ...nlet isolation valve closed to allow the pump to warm up to its operating temperature Without inlet purge warm up takes approximately 30 to 45 minutes depending on the ambient temperature With an inlet purge pressure of 50 to 250 mbar 5 x 103 to 2 5 x 104 Pa 37 5 to 188 Torr warm up time can be reduced to as little as 10 minutes WARNING Take all necessary safety precautions when you pump toxic fla...

Page 32: ...shut it down If you do not process vapours may condense in the pump and corrode or damage it Note If the pump will be shut down for a long time in an environment where the temperature is close to freezing we recommend that you drain the cooling water from the pump to prevent damage to the pump refer to Section 6 1 1 Isolate the pump inlet from the process gases 2 Refer to Figure 1 Purge the pump o...

Page 33: ... dangerous substances out of the system and leakage of air into the system refer to Section 3 13 Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the pump has overheated to 260 C 500 F and above These breakdown products are very dangerous The pump may have overheated if it was misused if it malfunctioned or if it was in a fire Edwards Material ...

Page 34: ...for example water contamination will turn the oil a white colour you must change the oil You may be able to remove the contaminants from the oil by filtration 5 7 Relubricate the high vacuum bearings When necessary The frequency of maintenance depends on the operating temperature of the pump refer to Section 5 8 5 8 Clean the cooling jacket Yearly or when necessary 5 9 Replace the interstage relie...

Page 35: ...f the pump overhaul see Section 5 15 However you may need to replace the air filter element more frequently if you use the GV pump in an environment where there are excessive air borne particulates refer to Table 15 for the Item Number for a new air filter element 1 If you have connected a nitrogen gas ballast supply continue at Step 6 otherwise continue at Step 2 to inspect the air filter element...

Page 36: ...valve does not operate correctly use the following procedure to inspect it Refer to Figure 7 1 Remove the four M8 bolts 11 which secure the retainer 9 to the exhaust manifold 3 2 Fit two of the bolts 11 into the jacking holes 10 and tighten the bolts to remove the retainer 9 from the exhaust manifold 3 3 Remove the valve flap 7 and valve body 2 assembly from the exhaust manifold 3 4 Inspect the va...

Page 37: ...fit the valve flap to the valve body 2 8 Refit the valve body 2 in the exhaust manifold 3 9 Fit the retainer 9 to the exhaust manifold 3 and secure with the four bolts 11 Tighten the bolts to a torque of 10 Nm 7 4 lbf ft Figure 7 Exploded view of the interstage relief valve 1 Hinge bush 2 Valve body 3 Exhaust manifold 4 O ring 5 O ring 6 Valve O ring 7 Valve flap 8 O ring 9 Retainer 10 Jacking hol...

Page 38: ...l filler port 1 10 If the oil drained from the pump is very discoloured flush the gearbox with new or clean oil two or three times until the oil which drains from the gearbox is clean WARNING The pressure in the gearbox will be equal to the pressure of your shaft seals purge gas supply Loosen the oil filler plug and wait for two or three seconds for the pressure in the gearbox to equalise before y...

Page 39: ...cap 6 and bearing cap O ring on the driven rotor shaft 3 Use a clean lint free cloth to remove as much old grease as possible from the inside face of the bearing caps 4 6 and from the top of the bearings 2 Do not use your fingers for this operation 4 Inspect the bearings 2 for obvious signs of wear or the presence of debris If the bearings are worn contact your supplier or Edwards for advice 5 If ...

Page 40: ...go are trademarks of Edwards Limited Maintenance Figure 8 Oil level sight glass and oil filler and drain ports 1 Oil filler port 2 Gearbox 3 Oil drain plug 4 Bonded seal 5 Oil drain port 6 Compression ring 7 O ring 8 Sight glass 9 O ring 10 Bezel 11 Screws 4 off 12 Oil filler plug 13 Bonded seal ...

Page 41: ... are trademarks of Edwards Limited Maintenance A705 61 880 Issue M Figure 9 Relubricate the high vacuum bearings 1 Drive rotor shaft 2 Bearings 3 Bearing cap O ring 4 Drive shaft bearing cap 5 Bolt 6 Driven shaft bearing cap 7 Correct direction of rotation 8 Bearing carrier bolt ...

Page 42: ...ove any sediments from the port 8 Turn on the water supply for a short time to flush any remaining deposits from the cooling jacket 9 Disconnect the water supply pipeline from the cooling water outlet connection 2 then dispose of the water and deposits in the splash tray 10 Apply a suitable thread sealant such as Loctite 577 to the threads of the 1 inch BSP water inlet fitting then refit the fitti...

Page 43: ... your electrical supply cable from the terminal box 2 Refer to Figure 10 Fit slings and suitable lifting equipment to support the pump motor then remove the fixing bolts 1 which secure the pump motor 19 to the coupling housing 7 3 Use the lifting equipment to move the pump motor 19 away from the pump then carefully lower the pump motor so that it rests on the floor in an upright orientation that i...

Page 44: ...nut 11 Apply a suitable thread sealant such as Loctite 242 Nutlock to the set screw 5 then fully tighten it 8 Slide the holding ring 17 over the coupling hub 14 9 Inspect the bottom flange of the coupling housing 7 and the flange of the pump motor 18 The flanges must be free of burrs and dirt If necessary clean or refinish the flanges 10 Use suitable lifting equipment to lift the pump motor off th...

Page 45: ...g insert 15 to the gaps between the teeth on the drive hub 16 and coupling hub 14 21 Turn the holding ring 17 so that the reference line on the holding ring is aligned with the split in the coupling insert 15 then slide the holding ring over the insert 22 Tighten the set screws 3 to secure the holding ring 17 in place 23 Ensure that all of the fixing bolts 1 are tightened to a torque between 128 a...

Page 46: ...loded view of the pump motor coupling drive and coupling housing 1 Bolt 2 Key 3 Set screws 4 Set screw 5 Set screw 6 Bolt 7 Coupling housing 8 Key 9 Pump shaft 10 Gearbox 11 Shaft bearing nut 12 Coupling cover 13 Bolt 14 Coupling hub 15 Coupling insert 16 Drive hub 17 Holding ring 18 Motor shaft 19 Pump motor 20 Gap A Adjust the coupling on the drive shaft ...

Page 47: ... lbf ft 9 Use the four bolts 13 to secure the other coupling cover 12 to the coupling housing 7 Tighten the bolts to a torque between 3 and 5 Nm 2 2 and 3 7 lbf ft 5 13 Relubricate the motor bearings 5 13 1 General requirements You must only relubricate the pump motor bearings if you have been suitably trained in all of the procedures required to remove and refit the motor to dismantle and reassem...

Page 48: ... following when you replace the motor bearings You will need a Motor bearing kit refer to Section 7 3 Use the procedures in this manual to remove and refit the motor Only use approved procedures to dismantle and reassemble the motor and to replace the bearings 5 15 Overhaul the pump We recommend that the pump is given a major overhaul every three years Such an overhaul is outside the scope of this...

Page 49: ...nt cooling water flow through the pump and the thermal snap switch is faulty contact your supplier or Edwards for advice Has the pump seized due to deposits Switch off the pump and contact your supplier or Edwards The pump operates at too high a temperature or the pump temperature is unstable Is the cooling water flow inadequate is the flow variable or is the flow being interrupted Before you rest...

Page 50: ...5 7 Have the seals in the pump failed The seals must be replaced Contact your supplier or Edwards for advice The gearbox is noisy Is the oil level low Check the oil level and fill as necessary refer to Section 5 3 The pump does not operate Is the pump motor faulty Make all the other appropriate checks in this table If there is no other apparent cause for failure of the pump to operate check the pu...

Page 51: ...from the shaft seals purge inlet 22 If fitted disconnect the gas ballast nitrogen supply from the gas ballast system 4 Disconnect the pump inlet 6 and outlet 13 from your process and exhaust pipelines 5 Fit blanking plates to the pump inlet 6 and pump outlet 13 Place protective covers over the pump services connection points 6 Store the pump in clean dry conditions until required 7 When required f...

Page 52: ...A705 61 880 Issue M Page 46 Edwards Limited 2012 All rights reserved Edwards and the Edwards logo are trademarks of Edwards Limited This page has been intentionally left blank ...

Page 53: ... decontamination service exchange repair rebuild and testing to factory specifications Equipment which has been serviced repaired or rebuilt is returned with a full warranty Your local Service Centre can also provide Edwards engineers to support on site maintenance service or repair of your equipment For more information about service options contact your nearest Service Centre or other Edwards co...

Page 54: ...oustic jacket Gas control system Motor control module Cooling water control panel Table 17 Spares Item Numbers Spare Kit Item Number Edwards Mobil SHC 629 oil 1 litre 0 25 US gallons H110 23 010 Edwards Mobil SHC 629 oil 4 litres 1 US gallons H110 23 011 Interstage Pressure Relief Valve complete valve assembly A705 11 832 Routine Maintenance Kit A705 11 825 Motor Fitment Kit A705 01 805 Inlet End ...

Page 55: ...tem 3 I Inspect the gas ballast system 29 Inspect the interstage relief valve and replace the hinge bushes valve flap and valve O ring 30 Inspect the pipelines and connections 29 Installation 11 Interstage relief valve 3 Introduction 1 47 L Leak test the system 22 Liquid pumping capability 4 Locate the pump 13 Lubrication data 8 M Maintenance 27 Maintenance plan 27 Mechanical data 6 N Noise data 8...

Page 56: ...A705 61 880 Issue M Page 50 Edwards Limited 2012 All rights reserved Edwards and the Edwards logo are trademarks of Edwards Limited This page has been intentionally left blank ...

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