Instruction Manual
D101299X012
RSS Valve
July 2017
9
the valve and bonnet with a feeler gauge (figure 5). At all bolting locations, the gap must be equal and
approximately 2.0 mm (0.080 inches) for NPS 1 through 4 valves. In order to keep the gap equal, the individual
bolts may have to be tightened to different torque levels.
Note
Due to the cold flowing tendency of the valve liner, this procedure should be repeated upon installation and after the first thermal
cycle of the valve.
11. Install the packing rings, packing box ring, and packing follower (keys 13, 12, and 11) over the valve stem. Tighten
the packing follower to 1.13 N
S
m (10 lbf
S
in) of torque to ensure the packing rings are seated. After the packing
rings are seated, loosen the packing follower one half turn.
12. Manually press the valve stem (key 5) into the valve until the valve plug contacts the seat ring.
CAUTION
Improper adjustment in step 13 might cause damage to trim parts. Perform this step carefully.
13. Thread the travel stop (key 16) onto the valve stem until there is a 0.5 mm (0.020 inch) gap between the bottom
surface of the travel stop legs and the top of the bonnet (figure 5).
14. Thread the locknut (key 10) onto the stem and tighten it against the travel stop.
15. Mount the actuator and secure it with the yoke locknut (key 14). Connect the actuator stem and valve stem
according to the procedure in the appropriate actuator instruction manual.
Figure 6. Typical Locking Rope Installation
WITH LOCKING ROPE PARTIALLY REMOVED
WITH LOCKING ROPE INSTALLED
W9165‐1
W9166‐1