Samson 3248-1, Mounting And Operating Instructions

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3 Installation
3.1 Mounting position
The valve can be mounted in any position.
It must be installed free of tension.
If necessary, supports can be mounted on
the pipelines near the connections.
Caution!
Prior to weld the valve body into the
pipeline, apply the loading pressure for
valves with fail-safe action “Actuator stem
extends” (valve closed), to move the valve
plug out of the seat. This prevents the trim
from being damaged by excessive high
temperatures.
Note:
Remove the stopper from the test connection
(4.4) to allow the metal bellows (6.3) to be
monitored for leakage.
3.2 Signal pressure line
Connect the signal pressure line for valves
with actuator version "Actuator stem ex-
tends" to the loading pressure connection on
the bottom diaphragm case, and for valves
with actuators "Actuator stem retracts" to the
loading pressure connection on the top dia-
phragm case.
The lower connection of Type 3277 Actuator
is located on the yoke of the bottom dia-
phragm case.
4 Operation
To reverse the direction of action, refer to
Mounting and Operating Instructions of the
respective pneumatic actuator.
EB 8310 EN for Type 3271 and
EB 8311 EN for Type 3277.
5 Maintenance
If leakage occurs, this could be caused by a
damaged metal bellows (6.3) or a defective
packing (4.2).
If the valve does not seal properly, the tight
shut-off may be impeded by dirt or other im-
purities caught between the seat and plug,
or by damaged facings.
Remove the parts, clean them thoroughly
and replace them with new ones, if neces-
sary.
Before servicing or disassembling the
control valve, depressurize the con-
cerned section of the plant and drain
it.
Wait until the medium has reached
ambient temperature, if necessary.
As valves are not free of cavities,
there might still be residual medium
in the valve. We recommend remov-
ing the valve from the pipeline or re-
move the entire valve assembly when
the valve is welded in the pipeline.
On performing any work on the
valve body, first shut off the supply
pressure, disconnect the supply pres-
sure line and remove the actuator.
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EB 8093 EN
Installation