6
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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