DeZURIK
RCV Rotary Control Valves
June 2017
Page 9
D10361
Seat Replacement
(Continued)
13. Apply a thread locking compound (removable
type) to the retainer screw threads, and tighten
the retainer screws (A4) finger tight.
14. Open the valve until the plug does not touch the
seat, then rotate it back toward the closed
position until the plug just touches the complete
circumference of the seat.
15. Tighten the retainer screws (A4) evenly while
allowing the seat to center on the closed plug.
16. Tighten the screws to the torques shown in Table B.
Table B: Torques for Retainer Screws
Valve Size
Torque
in
mm
ft lbs
Nm
1 - 2
25 - 50
10 ±2
13 ±2
2½ - 4
60 - 100
12 ±2
16 ±2
6 & 8
150 & 200
16 ±2
22 ±2
10 & 12
250 & 300
40 ±3
54 ±4
