Reassembly
1. Clean the valve, components, and all critical sealing
surfaces.
NOTICE
Do not use abrasive cleaners on critical sealing
surfaces. Leakage could result.
2. Secure the valve body vertically in a vise.
3. Apply a light coat of P-80 to the back of the seat. Assemble
the
seat
into body, concave face up.
4. Assemble the
slip ring
onto the stem with the spiral groove
facing up.
5. Apply a heavy coat of Molykote G-Rapid Plus on the lower
stem
neck above the slip ring.
6. Assemble the stem through the body into the stem bore.
7. Assemble the spring into the bottom of the stem
(50 mm bore only).
8. Assemble the spring into bottom of the ball
(50 mm bore only).
9. Orient the
ball
slot with
the
stem tab
.
10. Push the lower spring into the ball while pivoting the ball to
engage the stem spring (50 mm bore only).
11. Assemble the ball into body and engage with the stem.
NOTICE
Ensure the ball does not fall into the body or the ball
could be scratched. Leakage could result.
12. Ensure both springs are seated in the spring pockets
(50 mm bore only).
13. Apply a light coat of P-80 on back of the seat.
14. Assemble the
seat
into the flange, concave face up.
15. Assemble the body seal into the body.
16. Clamp the valve body in a vise.
17. Assemble the flange into the body.
NOTICE
Take care not to pinch the body seal. Leakage could
result from the graphite seal.
Ensure the seat remains
seated in the flange before torquing to prevent
damage to the seat.
18. Apply a heavy coat of Molykote 1000 to the first half of the
flange bolt
threads.
19. Assemble the flange bolts and finger-tighten.
20. Set the ball to a fully open position using the unassembled
handle.
21. Remove the unassembled handle.
22. Torque the flange bolts to 1200 in∙lb (135 N∙m) in an
alternating pattern of 200 in∙lb (22.6 N∙m) increments.
1
5
4
3
2
Lube
6
5
4
3
2
1
or
6
Seat
Slip ring
Lube
Ball
Stem tab
Seat
Flange bolt
Stem
Concave up
Concave up
