8
Valve
Size
NPT
Dim. A
ACTION
IN to Close OUT to CLOSE
1/4"-1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
3"
4"
5"
6"
2-1/4"
2-3/16"
2-3/16"
2-1/8"
2-1/8"
2-1/8"
2-1/8"
2-1/8"
2-1/8"
2-1/8"
2-1/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
2-3/8"
*2 1/2" size valve and above
"A" dimension is from top of spacer
to the top of lock nuts.
3-Way Valves-Stem Out
Size-NPT
1/2" thru 2"
2 1/2" thru 6"
Dimension "A"
2 3/8"
2 3/8"
Figure 3 Figure 4
Figure 5
Replacing Valve Body Assembly
1.
Unless already completed, install two locknuts onto valve stem.
a.
Thread locknuts loosely onto the valve stem.
b.
Push or pull the valve stem as appropriate to fully CLOSE a two
way valve. For a three-way valve pull the stem full OUT.
c.
Set the topmost locknut to the dimension shown and tabulated
in Figure 6.
d.
Tighten the lower locknut up against the upper locknut making
sure that the nuts are tight enough against each other to
prevent further turning about the valve stem.
Figure 6
2.
Allow the sensing bulb on the actuator to cool to the bottom of the nominal range. Artificially cool with ice if
necessary.
3.
Record the current actuator adjusting screw setting relative to the reference scale.
4.
Turn the actuator adjusting screw in (up) to reference number 8.
5.
Place valve stem up through the Yoke and Bonnet Nut.
6.
Thread the valve stem into the actuator stem.
a.
Use a 5/16” wrench to hold or turn the actuator stem.
b.
Use a 3/8” wrench to hold the valve stem nuts to turn the valve stem.
DO NOT DIRECTLY GRIP THE ROUND POLISHED PORTION OF THE VALVE STEM
.
•
If the valve plug can remain open relative to the valve seat, turn the valve stem into the actuator stem
until the locknuts are tight against the actuator stem.
•
If the valve plug is closed against the valve seat, then gently turn the actuator down onto the valve stem
until the actuator stem is tight against the locknuts.
7.
Use a 1-½” wrench to tighten the Bonnet Nut down onto the bonnet to hold the valve body assembly
to the yoke.
8.
Return the actuator adjusting screw to the previously recorded reference setting.
A
W91/94
A
1/2"-2"
Lock Locknuts
together securely as
tabulated with valve
fully closed.
Valves 2" and
smaller top
of Bonnet Hex
2-1/2"-2"
Lock Locknuts together
securely as tabulated
with valve fully closed.
Valves 2-1/2"
and larger
top of spacer.
