24
5.2.2 Spring kit - How to fit:
Note: Items 9 and 28 do not apply to the PN9400 actuator.
-
Remove the actuator from the valve as described in Section 5.1.
Note: Please observe Note 1, above. Refer to Section 5.4 if a handwheel is fitted.
-
Lubricate the threads of the three long hex. head screws with a PTFE based grease
before releasing the tension in the springs.
-
Loosen and remove the short housing screws and nuts (22, 23 and 24).
-
Holding each nut with a spanner, rotate the three long hex. head screws a few turns at
a time. Remove the screws and upper housing (2).
-
Replace with new springs. While supporting the actuator spindle (6) so that the
diaphragm sits evenly in the lower housing, refit the top housing (2) and tighten the
screws evenly. Please observe Note 2, above. Refer to Section 5.4 if a handwheel is
fitted.
Table 1 Recommended tightening torques
Actuator series
Screws and nuts
(Items 22, 23 and 24)
Bolt
(Item 21)
Size Torque Size Torque
N m lbf ft N m lbf ft
PN9100 M6 7 5.2 M12 40 29.5
PN9200 M10 35 26.0 M12 40 29.5
PN9300 M10 35 26.0 M12 40 29.5
PN9400 M10 60 44.0 M16 40 29.5
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