Mounting The Actuator Onto The Valve - Samson 3256 Mounting And Operating Instructions

5.3.2 Mounting the actuator
onto the valve
WARNING
!
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. They can be identified by the long
bolts protruding from the bottom of the actu-
ator.
Î Before starting any work on the actuator,
relieve the compression from the pre-
loaded springs (see associated actuator
documentation).
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.
Versions with V-port plug
To achieve the best flow conditions inside the
valve, the V-port plug must always be in-
stalled with the port that releases the flow
first when the valve opens facing toward the
valve outlet. This is the largest of the three
V-shaped ports (see Fig. 5-6).
Î Before mounting the actuator, determine
which V-shaped port is uncovered first
when the plug is lifted out of the seat.
Î On mounting the actuator, make sure
that the V-shaped port uncovered first
faces toward the valve outlet:
EB 8065 EN
2x small V-ports
1x large V-port:
First to release the flow when the
plug is lifted out of the seat.
Fig. 5-6: V-port plug
a) Mounting the actuator
Î To mount the actuator, proceed as de-
scribed in the associated actuator docu-
mentation.
b) Aligning the travel indicator
scale
After mounting the actuator, the travel indi-
cator scale must be aligned. To do so, align
'0' on the travel indicator scale with the tip
of the stem connector clamp (see Fig. 5-5).
1. Move the valve to the closed position.
2. Loosen the screws on the travel indicator
scale.
3. Align the travel indicator scale.
4. Fix the travel indicator scale into place
by tightening the screws.
Installation
5-13