DeZURIK
RCV Rotary Control Valves
D10361
Page 14
June 2017
Valve Reassembly
(Continued)
17. Apply a light coat of media compatible, anti-seize compound to the setscrew (A13).
18. With the plug in the open position, install the setscrew (A13) into the plug upper hub, and tighten
to the torque specified in Table D.
Table D: Torques for Setscrews
Valve Size
Torque
in
mm
ft lbs
Nm
1 - 2
25 - 50
6 ±1
8 ±1
2½" - 4
60 - 100
10 ±2
13 ±2
6
150
12 ±2
16 ±2
8
200
16 ±2
22 ±2
10 & 12
250 & 300
18 ±2
24 ±2
19. Stake the set screw in the plug hub to secure it in place.
20. Mount the adaptor (P2) on the body (A1) with screws (A27) and lockwasher (A28), and tighten
to the torque shown in Table E.
21. Mount the actuator on the valve as described in the Actuator Instructions.
22. Place the seal (A31) into the cavity in the seat retainer (A3), and apply a light coat of media-
compatible grease to the seal.
NOTE:
If a metal "C" seal is used, insert the seal so the gap in the seal faces the retainer. See Figure 2,
detail "A."
Table E: Torques for Mounting Screws
Valve Size
Torque
in
mm
ft lbs
Nm
1 - 2
25 - 50
12 ±2
16 ±2
2½" - 4
60 - 100
12 ±2
16 ±2
6 & 8
150 & 200
40 ±3
54 ±4
10 & 12
250 & 300
80 ±5
108 ±7
23. Install the seat (A16) and seat retainer (A3) as described in the SEAT REPLACEMENT section.
24. Set the closed position stop as described in the ACTUATOR CLOSED POSITION STOP
ADJUSTMENT section.
25. Install the valve in the pipeline as described in the INSTALLATION section of these instructions.
26. If the actuator is a powered actuator, reconnect power to the actuator.
27. The pipeline may now be pressurized. Once pressurized, verify that the valve is sealing
properly.
a. If seat leakage occurs, adjust the closed position stop until seat leakage stops.
b. If packing leakage occurs, tighten the gland nuts (A8) evenly and slowly, just enough to
stop leakage.