Flowserve PA46 Manual de usuario descargar pdf (Pagina 20)

Maintenance  continued 

Replacing stufﬁng box MPA 46, MPA 47

1. Detach pressure line for the control ﬂuid of the diaphragm actuator from the screwed socket

2. Remove diaphragm actuator

Y. Fig. 4

3. Remove spacer disk

X and pressure plate V.

4. Unscrew hexagonhead cap screws

5. Remove pressure plate

V and mounting bracket B.

6. Pull out split pin

7. Use openend spanner A. F. 28 mm to unscrew the pressure pin

R from the valve plug D.

8. Remove compression spring

9. Use openend spanner A. F. 32 mm to unscrew the union nut

10. Unscrew sealing plug

G and remove gasket F.

11. Pull out valve plug

12. Take out internal parts

N M L K L J of stufﬁng box.

13. Clean stufﬁng box, valve body and valve plug.

14. Reinsert valve plug

D and use abrasive paste type TETRABOR

F400 for polish grinding.

15. Insert new gasket

F and screw in sealing plug G. Tighten with a torque of 350 Nm.

16. Reinsert internal parts of stufﬁng box according to order as speciﬁed on page 24.

Fig. 5, Fig. 6

17. Apply heatresistance lubricant to stufﬁng box thread (use e.g. WINIX

2150).

18. Align valve plug

D such that the hole for the split pin S is perpendicular to the ﬂow direction of the

intermittent valve.

19. Use openend spanner A. F. 32 mm to screw in union nut

O and tighten at room temperature with

a torque of 55 Nm.

20. Apply heatresistant lubricant to both sides of the compression spring

P (use e. g. WINIX

2150) and

place it onto the union nut O.

21. Use openend spanner A. F. 28 mm to screw the pressure pin

R onto the valve plug D until the

holes for the split pin S in the valve plug and the pressure pin overlap.

22. Insert split pin

23. Reinsert mounting bracket

B and pressure plate V. Align check hole C to the right.

24. Insert hexagonhead cap screws

W and tighten them in diagonally opposite pairs with a torque

of 20 Nm.

25. Put spacer disk

X onto pressure plate V.

26. Screw on diaphragm actuator

Y with a torque of 120 Nm.

27. Attach pressure line for the control ﬂuid of the diaphragm actuator.

28. Operate the valve once.

WINIX

2150 is a registered trademark of WINIX GmbH, Norderstedt

TETRABOR

is a registered trademark of WackerChemie GmbH, Kempten

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