9
Flow Control Division
Kammer Control Valves
18
REMOVING ACTUATOR FROM VALVE
(See Fig. 1)
18.1
Shut off air supply.
DANGER:
..Ensure that actuator is not under pressure
and drain process medium before performing
maintenance work. Failure to observe can lead to
serious injuries.
18.2
Remove piping if required.
18.3
Remove 2 coupling bolts and remove coupling.
18.4
Loosen yoke stem nuts and remove. Carefully remove
actuator from valve.
18.5
After loosening counternut, unscrew coupling insert
(caution: hold plug with wrench on coupling insert to
prevent turning).
19
ATTACHING ACTUATOR TO VALVE
(see Fig. 1)
The actuator stem must be fully extended:
Actuators with air-to-open action must be fully vented.
Actuators with air-to-close action apply supply pres-
sure.
Manually depress the plug stem to ensure the plug is
fully seated.
The valve plug must make contact in the valve seat, i.e.
press valve stem in all the way by hand.
19.1
Screw coupling insert locknut and coupling insert as far
as possible onto plug stem.
19.2
Place the actuator assembly on the valve engaging the
yoke rod threads in the lower yoke plate and ensuring
the actuator faces in the correct direction.
19.3
Unscrew the coupling insert until the yoke rods are
raised from the lower yoke plate by around 2 mm.
NOTE:
Ensure that the plug assembly is not rotated with
the plug seated. This may cause irreparable damage to
the seating faces.
19.4
Refit the coupling, ensuring that the arrows, embossed
on the coupling halves, point upward towards the
actuator, and secure with 2 retaining screws.
9.5
Apply supply pressure resp. vent actuator to half stroke
and refit and tighten yoke rod retaining nuts.
19.6
Reconnect all tubing.
