Flowserve PA46 - Manual (Page 18)

8
Replacing stuffing box PA 46, PA 47
. Undo retaining piece 3 for forkhead T and pull out hand lever 1. Fig. 3
. Unscrew hexagonhead cap screws W and remove locking lever A.
3. Remove pressure plate V and mounting bracket B.
4. Pull out split pin S.
5. Use openend spanner A. F. 8 mm to unscrew the pressure pin R from the valve plug D.
6. Remove compression spring P.
7. Use openend spanner A. F. 3 mm to unscrew the union nut O.
8. Unscrew sealing plug G and remove gasket F.
9. Pull out valve plug D.
0. Take out internal parts N M L K L J of stuffing box.
. Clean stuffing box, valve body and valve plug.
. Reinsert valve plug
D and use abrasive paste type TETRABOR ® F400 for polish grinding.
3. Insert new gasket F and screw in sealing plug G. Tighten with a torque of 350 Nm.
4. Reinsert internal parts of stuffing box according to order as specified on page 4. Fig. 5, Fig. 6
5. Apply heatresistance lubricant to stuffing box thread (use e.g. WINIX ® 50).
6. Align valve plug D such that the hole for the split pin S is perpendicular to the flow direction of the
intermittent valve.
7. Use openend spanner A. F. 3 mm to screw in union nut O and tighten at room temperature with a
torque of 55 Nm.
8. Apply heatresistant lubricant to both sides of the compression spring P (use e. g. WINIX ® 50)
and place it onto the union nut O.
9. Use openend spanner A. F. 8 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.
0. Insert split pin S.
. Reinsert mounting bracket B and pressure plate V. Align check hole C to the right.
. Insert and screw in hexagonhead cap screws W and locking lever A and tighten them in
diagonally opposite pairs, applying a torque of 20 Nm.
3. Insert hand lever 1 and fix it to the forkhead T by means of retaining piece 3.
4. Operate valve once (open it until it hits the stop).
Maintenance
 continued 
WINIX ® 50 is a registered trademark of WINIX GmbH, Norderstedt
TETRABOR ® is a registered trademark of WackerChemie GmbH, Kempten
Risk of severe burns and scalds to the whole body!
Before carrying out any maintenance work on the valve or loosening flanged connections,
stuffing box unions or sealing plugs make sure that all connected lines are depressurized
(zero bar) and cooled down to room temperature (0 °C).
Danger