Mounting The Actuator On The Handwheel - Samson 3273 Mounting And Operating Instructions

5.3 Mounting the actuator on
the handwheel
WARNING
!
Risk of personal injury due to incorrect re-
moval of the anti-rotation fixture with
clamps under tension.
Once the actuator has been mounted on the
valve and the assembly is ready for use, the
clamps (301) of the anti-rotation fixture on
the plug stem are under tension.
Î Follow the instructions in this document
during mounting or removal.
Î Do not loosen the screws (303) of the an-
ti-rotation fixture while the force generat-
ed by the supply air and/or the actuator
springs is transmitted to the actuator stem
and the stem connector rod (G5).
Î First remove the actuator from the valve
or ensure it cannot transmit any forces to
the actuator stem before removing the
anti-rotation fixture on the plug stem.
Tip
The handwheel and actuator are assembled
with special attention paid to the actuator's
bench range and direction of action. These
details are specified on the actuator name-
plate (see the associated actuator documen-
tation).
1. Move the handwheel to the neutral posi-
tion (see section 7.1).
2. Remove the clamps of the stem connector
(A26/27) and the ring nut (A8) from the
actuator.
EB 8312-2 EN
3. Apply a suitable lubricant to the thread-
ed nipple on the top bonnet (G60).
4. In the "actuator stem extends" version:
apply a signal pressure to the connection
on the bottom diaphragm chamber to
completely retract the actuator stem (A7).
In the "actuator stem retracts" version:
vent the actuator to retract the actuator
stem (A7) completely.
5. Place the actuator on the top bonnet
(G60) of the handwheel.
6. Apply a suitable lubricant to the ring nut
(A8).
7. Slide the ring nut (A8) over the actuator
stem (A7) and fasten it on the actuator.
Observe tightening torques.
8. Adjust the rated travel of the actuator
over the stem connector nut (G70).
The rated travel corresponds to the dis-
tance from the bottom of the actuator
stem to the tip of the stem connector nut.
9. Use a suitable tool to lock the stem con-
nector nut (G70) at the lock nut (G42) on
the actuator side.
10. In the "actuator stem extends" version:
vent the actuator to extend the actuator
stem (A7) completely. It must touch the
stem connector nut (G70).
In the "actuator stem retracts" version:
apply a signal pressure to the actuator to
extend the actuator stem (A7) complete-
ly. It must touch the stem connector
(G70).
11. Connect the threaded rod and actuator
stem (A7) using the stem connector
Installation
29