Samson 3372 - Removing the Actuator from the Valve

11-2 EB 8313-3 EN
Removal
Î Before unblocking the actuator stem after
it has become blocked (e.g. due to
seizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the
'Removal' section.
Before removing the valve, make sure the fol-
lowing conditions are met:
− The actuator is put out of operation (see
the 'Decommissioning' section).
11.1 Removing the actuator
from the valve
See drawings in the 'Mounting and assem-
bly' section.
a) 120cm² version
For mounting using crossbeam (formB)
1. Remove the clamps of the stem connector
(A30) from the actuator.
2. For "stem extends" action with/without
preloaded springs: to undo the central
nut (98), apply approx. 50% signal
pressure to open the valve.
3. Unscrew the central nut (98) from the
plug stem.
4. Disconnect the signal pressure again.
5. In the "actuator stem retracts" version:
detach the external piping.
6. Lift the central nut (98) and actuator off
the valve.
7. Screw tight the central nut (98) on the
valve.
8. Screw tight the stem connector clamps
(A30) onto the actuator. Observe tight-
ening torques.
The actuator can be damaged.
Î Do not unscrew the rods (A11) from the
crossbeam (A17).
For mounting using rods (formC)
1. Remove the stem connector clamps (A29)
from the actuator.
2. Undo the rod nuts (A119) in alternating
sequence.
3. Pull the rods (A11) with bushings (A9)
out of the holes in the valve bonnet (2).
4. Remove the bushings (A9) from the actu-
ator and thread the rod nuts (A119) onto
the rods (A11).
5. Screw tight the stem connector clamps
(A29) onto the actuator. Observe tight-
ening torques.
b) 350cm² version
1. In the "actuator stem retracts" version:
detach the external piping.
2. Remove the clamps of the stem connector
(A12) from the actuator.
NOTICE
!