IM-P102-04
CTLS Issue 7
15
8.
Remove the screen and clean.
9.
Ensure the main valve return spring is still in position.
10.
Fit the new gasket.
11.
Replace the screen.
12.
Assemble the pilot valve housing and tighten the nuts to the torques shown in Table 1.
13.
Refit the pipework and retighten the unions to ensure a steam tight seal.
14.
Fit a new push rod assembly with return spring and replace the packless gland housing, tighten to
40 N m (30 lbf ft).
15.
Refit the adjustment head. Bring the valve back into commission by following as many steps as are
necessary in Section 3.
Table 1 Recommended tightening torques
Size of valve
Nut size
Tightening torques
½", ¾", 1"
DN15, DN20, DN25 and DN32
M10
40 N m (30 lbf ft)
DN40 and DN50
M12 45 N m
(33 lbf ft)
After fitting a new pilot valve seat and push rod it will be necessary to check the temperature control
points (see Section 3.3).
9
10
12
13
14
15
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Summary of Contents for 37D
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