Mounting The Actuator Onto The Valve; Installing The Valve Into The Pipeline - Samson 3321CT Mounting And Operating Instructions

5.3.1 Mounting the actuator
onto the valve
Depending on the version, SAMSON control
valves are either delivered with the actuator
already mounted on the valve or the valve
and actuator are delivered separately. When
delivered separately, the valve and actuator
must be assembled together on site.
1. Make sure that the valve is completely
open (the plug stem is completely retract-
ed).
Version with "actuator stem extends"
fail-safe action: apply a signal pressure
that corresponds to the upper bench
range value to the connection on the bot-
tom diaphragm chamber.
Version with "actuator stem retracts"
fail-safe action: make sure that no signal
pressure is applied to the actuator.
2. Undo the screws (10) on the valve bon-
net (7).
3. Lift the flange (14), valve bonnet (7) to-
gether with the plug and plug stem (3)
off the body (1).
4. Apply a suitable thread-locking fluid to
the female thread of the actuator stem.
5. Screw the plug stem (3) into the actuator
stem. Observe tightening torques.
6. Apply a suitable lubricant to the thread
of the valve bonnet (7).
7. Screw the valve bonnet (7) into the actu-
ator base until it reaches the metal stop.
Observe tightening torques.
EB 8115 EN
8. Carefully place the actuator, valve bon-
net (7), flange (14) and plug with plug
stem (3) onto the body (1).
Make sure that the marking on the valve
bonnet are aligned with the front of the
valve (see Fig. 5-2).
Make sure that the gasket (13) is proper-
ly seated in the body.
9. Apply a suitable lubricant to the screws
(10).
10. Firmly press the plug (3) into the seat (2),
while fastening down the valve bonnet
(7) with the screws (10). Gradually tight-
en the screws in a crisscross pattern. Ob-
serve tightening torques.
11. For further instructions concerning
Type 3379 Actuator (pneumatic connec-
tions, alignment of the actuator etc.)
u EB 8315.
5.3.2 Installing the valve into
the pipeline
NOTICE
!
Premature wear and leakage due to insuffi-
cient support or suspension.
Î Support or suspend the valve sufficiently
at suitable points.
1. Close the shut-off valves in the pipeline
at the inlet and outlet of the plant section
while the valve is being installed.
2. Prepare the relevant section of the pipe-
line for installing the valve.
Installation
5-5