6
7
III. CONSTRuCTION
· Pump is horizontal, multistage, section type. Pump shaft is the extended
motor shaft. Axial suction and radical discharge;
· HDROO Series are mainly composed of motor, suction head, discharge head,
diffuser, impeller, pump shaft, mechanical seal, etc.
· The key parts of pump---diffuser, impeller, inlet and outlet chamber,
pump shaft are made of stainless steel. The suction head and discharge head
of HF is made of cast iron.
· Mechanical seal is single face seal. Seal part is made of Silicon Carbide/
Carbide. Other material for Seal part is also available on demand of
customers.
· The standard connection type is pipe thread connection, which is conformable
with GB7307 standard. See the following pump structure figure.
HF, HX, HN 2 4-080701
Fig. 1B HF, HX, HN 2, 4 Pump structure
1. Suction
2. Plug
3. Bearing (W/O this part
in 2-3 stages pump)
4. Impeller
7. Discharge
8. Mechanical Seal
10. Base plate
11. Staybolt
12. Diffuser
12a. Neck ring retainer
12b. Neck ring
13. Support diffuser (W/O this
part in 2-3 stages pump)
14. Impeller sleeve
15. Sleeve 1 (W/O this part
in HF,HX, HN 2)
17. Seal ring
18. Impeller sleeve(S) (W/O
this part in 2-3 stages pump)
19. First impeller cover
20. Nut
23. O ring
24. Spring washer
25. Nut
28. Screw
29. Spring Washer
31. Washer
32. Motor
HF, HX, HFN 8, 12, 16, 20-080701
Fig. 1D HF, HX, HN 8, 12, 16, 20 Pump structure
1.- Suction
2.- Plug
3.- Bearing (W/O this part
in 1-2 stages pump)
4.- Impeller
7.- Discharge
8.- Mechanical Seal
10.- Base plate
11.- Staybolt
12.- Diffuser
(W/O this part in HF, HX, HN
20 1-3 stages pump)
12a.- Neck ring retainer
12b.- Neck ring
12c.- Last diffuser
(Only for HF, HX, HN 20)
13.- Support diffuser
(W/O this part in 1-2 stages
pump)
14.- Impeller sleeve
15.- Impeller sleeve(L)
(W/O this part in 1-2 stages
pump)
17.- Seal ring
18.- Impeller sleeve(S)
(W/O this part in 1-2 stages
pump)
19.- First impeller cover
20.- Nut
23.- O ring
24.- Washer
2S.- Nut
28.- Screw
29.- Spring washer
31.- Washer
32.- Motor