Davey VM Series User manual

Please pass on these instructions to the operator of this equipment.
VM Series
Vertical Multistage
Centrifugal Pump (50 & 60Hz)
Installation and Operating
Instructions
Tested in compliance with
for use in contact with safe drinking water

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Contents:
1. APPLICATIONS............................................................................................................................................3
2. IDENTIFICATION OF THE PUMP ...............................................................................................................4
3. STRUCTURE ................................................................................................................................................7
4. INSTALLATION INSTRUCTIONS...............................................................................................................13
5. STARTING AND MAINTENANCE ..............................................................................................................14
6. DISMANTLING AND ASSEMBLY ..............................................................................................................15
7. ORDER OF ASSEMBLY FOR DIFFUSERS AND IMPELLERS.................................................................19
8. FAULT FINDING .........................................................................................................................................27
9. IMPORTANT NOTICE.................................................................................................................................27
DAVEY WARRANTY.......................................................................................................................................28

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Please read instructions carefully before installing and operating the pump
1. APPLICATIONS
Davey’s latest range of high efciency, non self priming vertical multistage pumps provide low noise, small
footprint, very reliable as well as being easy to service and suit a wide number of applications.
1.1 Applications
Davey VMC pumps are designed for use with low viscosity, non amable, non explosive liquids that are free
from solids and bers. Please consult your Davey dealer for specic application needs.
Boiler feeding and condensation system;
Water treatment, inltration, ltration system
Food, beverage industry;
High building water supply;
Fire ghting system;
Industrial cleaning system;
Liquid transferring, circulating, boosting;
Hot water, cold water;
Irrigation applications.
1.2 Working conditions
Liquid temperature: -15ºC to +120ºC;
Flow rate range: 0.5-240m3/h;
Liquid pH range: pH- 0-14;
Max. ambient temperature: +40ºC;
Max. altitude: 1000m;
Min inlet pressure: Refer to NPSH curve;
Max. working pressure: See table 1A & table 1B.

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When the specic gravity or viscosity of the pumped liquid is different than water, the
shaft power of the pump will be increased. A larger motor will need to be selected. Please
contact your Davey representative for more details.
2. IDENTIFICATION OF THE PUMP
VM 32 - 2AM3
Motor tted
M1 = Single phase
M3 = Three phase
ML = Liquid end
Impeller variation
(A = turndown)
VM Series Vertical Multistage
Stainless Steel Pump
Number of stages
Nominal capacity at BEP in m3/hr
VM 20 - 5M3 - 316
316L stainless steel
Motor tted
M1 = Single phase
M3 = Three phase
ML = Liquid end
VM Series Vertical Multistage
Stainless Steel Pump
Number of stages
Nominal capacity at BEP in m3/hr

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Allowed maximum working pressure for the pump 50Hz
Model Max. working pressure
(bar)
VM1,3,5,10,15,20 Flange, pipe thread 25
VM32
VM32-1A to VM32-6B 16
VM32-6 to VM32-10B 30
VM42
VM42-1A to VM42-4B 16
VM42-4 to VM42-6 25
VM42-7B to VM42-7 30
VM65
VM65-1A to VM65-3 16
VM65-4B to VM65-52 25
VM90
VM90-1A to VM90-3B 16
VM90-3A to VM90-4B 25
VM120, 150, 200
VM120, 150, 200 20

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3. STRUCTURE
• Davey VMC pumps main components are: motor, pump head, diffusers, impellers, cylinder, inlet and outlet
chamber, shaft, mechanical seal,etc. See drawing 1.
• The pump key components such as diffusers, impellers, cylinder and shaft are made of stainless steel.
The pump head, inlet and outlet chamber are made from precision cast stainless steel.
Drawing 1-A VM1,3
1a. Coupling guard-left
1b. Coupling guard-right
2. Screw, washer
3. Pump head
3a. Lining
4. Diffuser
4a. Support diffuser
4b. Neck ring cover
4c.Neck ring
5. Coupling
5a. Inducer
6. Baseplate-Flange type
6a. Baseplate-cutting ferrule type
7. Shaft pin
8. Nut M12
8a. Washer 12
9. Screw
10. Circlip cover
20. Flange
21. Retaining ring
22. Supporting washer
23. Nut M8-LH
24. Impeller washer
25. Staybolt
26a. lnlet&outlet chamber-Flange type
26d. lnlet&outlet chamber-pipe thread type
28. Drain screw M10
29. Drain plug
30. O-ring 136. 5X3. 3
31. Y ring
33. Sleeve for support diffuser
34. Mechanical seal
36. Air vent plug
37. O-ring16X2.8
38. Air vent screw
39. Bolt, washer
40. Motor
47. lmpeller sleeve 9.6X12.6
47a. Bearing
49. Impeller
50a. Top diffuser
51. Shaft
55. Cylinder
60. Corrugated spring
63. O-ring retainer

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Drawing 1-B VM5
1a. Coupling guard-left
1b. Coupling guard-right
2. Screw, washer
3. Pump head
3a. Lining
4. Diffuser
4a. Support diffuser
4b. Neck ring cover
4c.Neck ring
5. Coupling
5a. Inducer
6. Baseplate-Flange type
6a. Baseplate-cutting ferrule type
7. Shaft pin
8. Nut M12
8a. Washer 12
9. Screw
10. Circlip cover
20. Flange
21. Retaining ring
22. Supporting washer
23. Nut M8-LH
24. Impeller washer
25. Staybolt
26a. lnlet&outlet chamber-Flange type
26d. lnlet&outlet chamber-pipe thread type
28. Drain screw M10
29. Drain plug
30. O-ring 136. 5X3. 3
31. Y ring
33. Sleeve for support diffuser
34. Mechanical seal
36. Air vent plug
37. O-ring16X2.8
38. Air vent screw
39. Bolt, washer
40. Motor
47. lmpeller sleeve 9.6X12.6
47a. Bearing
49. Impeller
50a. Top diffuser
51. Shaft
55. Cylinder
60. Corrugated spring
63. O-ring retainer

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Drawing 1-C VM10
1a. Coupling guard-left
1b. Coupling guard-right
2. Screw, washer
3. Pump head
3a. Lining
4. Diffuser
4a. Support diffuser
4b. Neck ring cover
4c.Neck ring
5. Coupling
5a. Inducer
6. Baseplate
7. Shaft pin
8. Nut M16
8a. Washer 16
9. Screw
10. Circlip cover
14. Strap
17. Impeller sleeve 29X17.4
20. Flange
21. Retaining ring
22. Supporting washer
23. Nut M10-LH
24. Impeller washer
25. Staybolt
26a. lnlet&outlet chamber-Flange type
26d. lnlet&outlet chamber-pipe thread type
28. Drain screw
29. Drain plug
30. O-ring 15X3. 3
31. Y ring
33. Sleeve for support diffuser
34. Mechanical seal
36. Air vent plug
37. O-ring 16X2.8
38. Air vent screw
39. Bolt, washer
40. Motor
46. Adjusting rubber
47a. Bearing
49. Impeller
50a. Top diffuser
51. Shaft
55. Cylinder
60. Corrugated spring
63. O-ring retainer
65. Screw M8X20

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Drawing 1-D VM15,20
1a. Coupling guard-left
1b. Coupling guard-right
2. Screw, washer
3. Pump head
3a. Lining
4. Diffuser
4a. Support diffuser
4b. Neck ring cover
4c.Neck ring
5. Coupling
5a. Inducer
6. Baseplate
7. Shaft pin
8. Nut M16
8a. Washer 16
9. Screw
10. Circlip cover
14. Strap
17. Impeller sleeve
20. Flange
21. Retaining ring
22. Supporting washer
23. Nut M10-LH
24. Impeller washer
25. Staybolt
26a. lnlet&outlet chamber-Flange type
26d. lnlet&outlet chamber-pipe thread type
28. Drain screw
29. Drain plug
30. O-ring 16X3. 3
31. Y ring
33. Sleeve for support diffuser
33b. Long sleeve for support diffuser
34. Mechanical seal
36. Air vent plug
37. O-ring 16X2.8
38. Air vent screw
39. Bolt, washer
40. Motor
46. Adjusting rubber
47a. Bearing
49. Impeller
50a. Top diffuser
51. Shaft
55. Cylinder
63. O-ring retainer
65. Screw M8X20, washer X8

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Drawing 1-E VM32,42,65,90
1. Coupling guard
2. Hex socket head screw
3. Pump head
4. Diffuser (Not for 1 stage pump)
4a. Support diffuser (Not for 1 or 2 stage pumps)
4b. Neck ring base assembly
5. Coupling
5a. Inducer
6. Baseplate
7. Bracket
8. Hex socket head screw
9. Hex socket head screw
10. Seal cover
11. Nut
11a. Flat washer
13. Hex socket head screw
13a. Flat washer
14. Strap
15. Impeller nut
15a. Impeller nut for support diffuser
(Not for 1 or 2 stage pumps)
16. Cone
17. Intermediate bearing
(Not for 1 or 2 stage pumps)
18. Cover
19. Flat washer
19a. Hex socket head screw
20a. Flange
25. Staybolt
26h. Inlet & outlet chamber CDLF type
26b. Inlet & outlet chamber CDL type
28. Drainage screw
29. Screw
30. O-ring
34. Mechanical seal
36. Air vent nut
37. O-ring
38. Air vent screw
39. Screw
39a. Nut
39b. Washer
40. Motor
44. Washer
45. Hex socket head screw
46. Adjusting rubber
47. Bottom bearing
47a. Bottom sleeve
49. Small impeller
49a. Impeller
49b. Ring for neck ring
50a. Top diffuser
51. Shaft
55. Cylinder

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Drawing 1-F VM120,150,200
1. Coupling guard
2. Hex socket head screw
3. Pump head
4. Diffuser (Not for 1 stage pump)
4a. Support diffuser (Not for 1 or 2 stage pumps)
4b. Neck ring cover
4c. Neck ring
4d. Screw
5. Coupling
5a. Inducer
6. Baseplate
7. Bracket
8. Hex socket head screw
9. Hex socket head screw
10. Seal cover
11. Nut
11a. Flat washer
13. Socket hex cap screw
13a. Flat washer
14. Strap
15. Impeller nut
16. Impeller shaft sleeve
17. Shaft sleeve
18. Cover
19. Washer 14
20a. Flange
25. Staybolt
26h. Inlet & outlet chamber CDLF type
26b. Inlet & outlet chamber CDL type
28. Drainage gag
29. Screw
30. O-ring
34. Mechanical seal
36. Air vent nut
37. O-ring
38. Air vent screw
39. Screw
39a. Nut
39b. Washer
40. Motor
46. Adjusting rubber
49. Small impeller
49a. Impeller
49b. Ring for neck ring
50a. Top diffuser
51. Shaft
55. Cylinder
56. Fasten screw
57. Inlet impeller sleeve
58. Washer

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4. INSTALLATION INSTRUCTIONS
4.1 Installation reminder
• Pump shall be installed in a well-ventilated and frost free place. It shall be kept at least 150mm from
enclosure walls, in order for motor fan cooling.
• To keep inlet wear to a minimum please try to use the shortest inlet pipework as possible.
• A check valve must be installed on the discharge pipelines.
• Please install you Davey VMC pump on a solid, at and level base to minimise any operational movement.
Please ensure all pipe work is supported as not to place undue stress on the pump / pipe connections.
When installing the pump, the motor must not be installed upside down.
• The mark on the inlet and outlet chamber indicates the liquid owing direction, before startup, check the
ow direction is correct direction.
• Install the pipes so that air locks do not occur, especially on the suction side of the pump. See drawing 2.
Drawing 2
4.2 Electrical connection
• The electrical connection should be carried out by an authorized electrician in accordance with
local regulations.
• The operating voltage and frequency are marked on the motor nameplate. Make sure that the motor is
suitable for the electricity supply on which it will be used and the motor terminal connection is correct.
You will nd a wiring diagram in the terminal box.
• The motor must be tted with starting protection, to prevent unstable voltage or overload, The motor shall
be earthed well.
Before removing the terminal box cover and before removing/dismantling the pump,
make sure that the electricity supply has been switched off.

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5. STARTING AND MAINTENANCE
Before starting, read the warning sticker carefully on the pump sleeve.
Before commencing any works on the pump please ensure the system pressure has
been relieved and the pump has been isolated from ow.
Before removing the terminal box cover and before removing/dismantling the pump,
make sure that the electricity supply has been switched off.
1. Do not start the pump until it has been lled with liquid .
• Positive suction head installation:
Close the valve on the discharge side of the pump and release the air vent screw, slowly open the valve
on the suction side. Tighten the air vent screw when a steady stream of liquid runs out of it.
• Negative suction head installation:
Attention: Must t a check valve on the suction side.
Close the valve on the discharge side of the pump and release the air vent nut, inject liquid into the hole,
Tighten the air vent nut when the pump and suction pipelines are full of liquid.
Pay attention to the direction of the air vent plug hole and take care to ensure that
the escaping water does not cause injury to persons or damage to the motor or other
components.
Pay special attention to the risk of injury caused by scalding hot water.
2. Check before start the pump:
• Whether the foundation bolts is tightened;
• Whether the voltage of power supply is normal;
• Whether there is leakage of pipelines;
• Whether the suction valve is fully open;
• If tted pressure gauge, check whether the pressure metering range is suitable;
• Ensure pressure gauges are of suitable range for the pump size.
3. Check rotating direction
Briey switch on the power. supply and view the rotary direction by viewing the motor fan. Arrow on the pump
head indicates the correct direction of rotation.That is, from the motor end, pump shall run counter-clockwise.
If direction is not correct swap power supply and briey try again.
4. Frequency of starts and stops
Pump can not be started and stopped frequently. For motor power
≤4kW, starting times shall more than 100 times per hour; for motor power
>4kW, starting times shall not be more than 20 times per hour.
5. Please ensure the pump used is suitable for the application used, as incorrect application may result in
over heating.
6. Frost protection
Measures to provide frost protection should be taken when ambient temperature is less than 0°C. Pumps
which are not being used should be drained to avoid damage from freezing.
7. Regularly check pump for the following:
• Whether pump operation pressure is in the required range
• Whether there is leakage of pump and pipelines
• That motor is in operating temperature
• Clean/replace strainer
8. Pump shall be cleaned and stored appropriately when it is not used for a long time.

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6. DISMANTLING AND ASSEMBLY
1. Summary
If it is necessary to dismantle the pump because of failure, please follow the instructions below.
Refer to drawing 1 to see pump structure.
1.1 Before dismantling
• Disconnect the electricity supply to the motor.
• Relieve system pressure and isolate ow
• Close the valve to avoid uid outow of pump.
• Note the centre of gravity of the pump to prevent it from overturning
1.2 Before assembly
• Clean and check all parts.
• Replace defective parts with new parts.
1.3 During assembly
• Tighten fasteners to required torque as stated in table 2.
Table 2 – Fastener torques
Pos. Name Dim. Quantity Torque(N-m)
9Screw
M6
4
23-25
M8 45-50
M10 80-85
M16 100-110
8Nut
M12
4
45-50
M16 95-100
M20 110-120
23 Nut
M8LH
1
25-30
M10LH 30-35
M14LH 70-75
M16LH 80-90
19a Screw M8LH 1 25-30
1.4 After assembly
• Turn the coupling by hand, it should be free.
• Connect the pump with pipelines, test it, it should run well.
2. Motor
2.1 Dismantling
• Remove the screws (pos. 2) together with the coupling guard (pos. 1a, 1b).
• Remove the screws (pos. 9) together with the coupling halves (pos. 5) and the shaft pin
(pos. 7 VM32-VM200 Without this part).
• Remove the motor bolts (pos. 39).
• Pull the motor off the pump head (pos. 3 VM1-VM20) or Bracket (pos.7, VM32-VM200).
2.2 Assembly
• Reverse steps 2.1 to assemble motor.
• Check that the gaps of either side of the coupling halves are equal.
• Tighten the screws(pos. 9) symmetrical and evenly by required torque as per table 2.
3. Mechanical seal
3.1 Dismantling
3.1.1 VM1,3,5,10,15,20
• Remove the motor (Power > 4kW) and the coupling. See 2.1 Dismantl ing.
• Slacken the three screws of mechanical seal (pos. 34) by approximately a qu arter turn so that the
mechanical seal is just free of the shaft (pos.51).
• Pull the mechanical seal off the pump head (pos.3) or lining (pos.3a)

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3.1.2 VM32-VM200
• Remove the motor(no need for power >5.5kw) and coupling, refer to 2.1 dismantling.
• Remove seal cover(pos.10) and four screws (pos.11).
• Slacken 3 screws of mechanical seals(pos.34) by about a quarter turn to make the mechanical seal fall
off the shaft (pos.51).
• Remove mechanical seal from pump head (pos.3)
3.2 Assembly
3.2.1 VM1,3,5,10,15,20
• Moisten the shaft end with soapy water.
• Press mechanical seal down on the shaft. Screw the mechanical seal into the pump head or lining
and tighten it.
• Fit the motor to the pump head.
• Tighten the bolts (pos.39) symmetrically.
• Fit the shaft pin (pos. 7) into the shaft pin hole and t the coupling hal ves (pos. 5) on the shaft. Tighten
the screws (pos.9) in coupling (but not tightly). Check that the gaps of either side of the coupling halves
are equal.
• Insert a suitable screwdriver between the top of the coupling and the pump head, and press the shaft/
coupling down against stop. Then Insert the screwdriver between the bottom of the coupling and the
mechanical seal, raise the shaft/the coupling to 1.5mm.
• Hold the shaft/the coupling in this position and tighten the four screws in the coupling (pos. 9) by the
required torque as per Table 2.
• Tighten the three screws of mechanical seal.
• Fit the coupling guard (pos. 1a, 1b) and fasten the screws (pos. 2).
3.2.2 VM32-VM200
• Moisten the shaft end with soap water.
• Press mechanical seal down on to the shaft, put it into pump head (pos. 3), tighten screw (pos.11) and
three screws of mechanical seal. Then lift the shaft and insert shaft height setting tool (pos.10a).
• Fit the motor to the pump head.
• Tighten the bolts (pos.39) symmetrically.
• Fit the coupling (pos.5) to the shaft. Tighten four screws(pos.9) in cou pling to torque required in Table 2.
(make sure distance of either side of cou pling halves are equal)
• Remove shaft height setting tool (pos.10a).
• Fit the coupling guard (pos.1) and tighten screws (pos.2).
4. Dismantling and assembly of bare shaft pump without motor
4.1 Dismantling
4.1.1 VM1,3,5,10,15,20
• Remove the shaft seal. See 3.1 Dismantling.
• Remove the screws together with the washers (pas. 8).
• Loosen the pump head (pas. 3) with a light blow on the edge and lift it.
• Remove lining (pos 3a)
• Remove top diffuser(pos. 50a) (Not for VM10,15,20)
• Remove the cylinder(pos. 55)
• Lift the diffuser stack off the inlet & outlet chamber (pos.26) .
• Remove inducer (pos. 5a)(Not for VM10,15,20)
4.1.2 VM32,42,65,90
• Remove mechanical sea, refer to 3.1 dismantling.
• Remove screws (pos.12).
• Remove bracket (pos.7)
• Remove nut and washer(pos.8 8a)
• Remove pump head (pos.3) by tapping at the edge of it.
• Remove cylinder (pos.55).
• Lift the diffuser stacks from inlet and outlet chamber (pos.26).

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4.1.3 VM120,150,200
• Remove mechanical sea,refer to 3.1 dismantling.
• Remove screws (pos.12 no this step for power >45kw pumps)
• Remove nut and washer (pos.8, Ba, no this step for power: 545kw pumps).
• Remove bracket (pos.7)
• Remove nut and washer (pos.88a)
• Remove pump head(pos.3) by tapping at the edge of it.
• Remove cylinder (pos.55).
• Lift the diffuser stacks from inlet and outlet chamber(pos.26).
4.2 Assembly
• Reserve the steps of 4.1 to assemble pump body.
• Lubricate O-ring (pos.30) by edible oil or soap water.
• Direction of air vent nut(pos.36) shall be same with drain plug (pos.29) of inlet and outlet chamber (used
for VM1-20);
• Direction of air vent nut (pos.36) shall be same with the inlet of inlet and outlet chamber (used for
VM32-200)
• Tighten screws (pos.8) symmetrically by torque required in Table 2.
5. Diffuser stack for model
5.1 Dismantling and assembly of diffuser stack for model VM1,3,5
5.1.1 Dismantling
• Remove the diffuser stack. See 4.1 Dismantling
• Insert a suitable screwdriver in the shaft (pos.51) pin hole to prevent it turning. Remove nut (pos.23),
impeller washer (pos.24)
• Remove the diffuser stack components: impeller (pos.49), diffuser (pos. 4), bearing (pos.47a), impeller
sleeve(pos.47), support diffuser (pos.4a). See drawing 5-A, 5-B.
5.1.2 Assembly
• Reverse steps of 5.1 to assemble diffuser stack.
• Fit the components on the shaft. See drawing 5-A, 5-B Order of asse mbly for diffusers and impellers.
• Tighten the nuts (pas. 23) by the required torque as Table 2 indicated.
5.2 Dismantling and assembly of diffuser stack for model VM10, 15, 20
5.2.1 Dismantling
• Remove the diffuser stack. See 4.1 Dismantling
• Remove screw, washer (pos.65)
• Remove straps (pos.14), inducer (pos.5a)
• Insert a suitable screwdriver in the shaft (pos.51) pin hole to prevent it turning. Remove nut (pos.23),
impeller washer (pos.24)
• Remove the diffuser stack components: impeller (pos.49), diffuser (pos. 4), bearing (pos.47a), support
diffuser (pos.4a). See drawing 5-C, 5-D.
5.2.2 Assembly
• Reverse steps of 6.1 to assemble diffuser stack.
• Fit the components on the shaft. See drawing 5-C, 5-D
Order of assem bly for diffusers and impellers.
• Tighten the nuts (pos. 23) by the required torque as Table 2 indicated.
5.3 Dismantling and assembly of diffuser stack for VM32, 42, 65, 90
5.3.1 Dismantling
• Remove the diffuser stack.refer to 4.1 Dismantling.
• Remove screw and washer (pos.65).
• Remove straps (pos.14) inducer (pos.5a) and top diffuser (pos.50a)
• Remove impeller nut (pos.15), impeller sleeve (pos.16), impeller (pos.49, 49a), diffuser (pos.4), support
nut(pos.15), sleeve(pos.17), support diffu ser (pos.4a). Refer to Fig. 5-E, 5-F, 5-G and 5-H.
5.3.2 Assembly
• Reverse the steps of 5.3.1 to assemble diffuser stack.
• Fit the components by reffering to Fig. 5-E, 5-F, 5-G and 5-H.
• The position of the rst impeller and shaft can refer to Fig.3.
• Tighten the screws (pos.19a) by the torque required in Table 2 (on following pages).

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Drawing 3 & 4
5.4 Dismantling and assembly of diffuser stack for VM120, 150, 200
5.4.1 Dismantling
• Remove the diffuser stack.refer to 4.1 Dismantling.
• Remove screw and washer(pos.65).
• Remove straps (pos.14) and inducer (pos.5a)
• Remove top diffuser (pos.50a) diffuser (pos.4) impeller nut (pos.15) impeller (pos.49 49a) impeller
sleeve(pos.16) support diffuser (pos.4a). Remove nut (pos.23) washer (pos.19) cover (pos.18) inlet
impeller sle eve (pos.57) sleeve (pos.17) support washer (pos.58)
5.4.2 Assembly
• Reverse the steps of 5.4.1 to assemble diffuser stack.
•The position of the rst impeller and shaft can refer to Fig.4.
Make sure dimension A is: 14.3mm for VM120, 150; 25.5mm for VM200
• For pumps with small impeller, t them to the outlet end; for pump with two different size small impellers,
t the smaller one to the outlet end.

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7. ORDER OF ASSEMBLY FOR DIFFUSERS AND IMPELLERS
1. See drawing 5-A for assembling order of VM1, 3.
Symbol information
Drawing 5-A VM1, 3 assembling order.

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2. See drawing 5-B for assembling order of VM5.
Symbol information
Drawing 5-B VM5 assembling order.

20
3. See drawing 5-C for assembling order of VM10.
Symbol information
Drawing 5-C VM10 assembling order.