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5. Maintenance
The PN9000 series pneumatic actuators (and variants) are maintenance free. To ensure
satisfactory operation it is strongly recommended that the control signal air is filtered and
supplied dry and free of oil. Should it be necessary to replace spare parts the following
procedure should be used.
CAUTION!
The diaphragm housing contains powerful springs under compression.
Exercise great care when dismantling.
Read this Maintenance section thoroughly prior to commencing any work.
5.1 Removing the actuator from the valve:
-
Drive the actuator into approximately mid-travel position with the air supply.
-
Loosen and remove the clamp nuts and screws (26 and 27, see Figure 10) and remove
the valve adaptor (11).
-
Loosen and remove the actuator mounting nut (see Figure 9) and lift the actuator off
the valve.
-
Reduce the air supply pressure until the housing is pressure free. Disconnect the air
supply from the actuator.
Fig. 9
25
Mid travel
Actuator mounting nut
10
11
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