18
EB 8314 EN
Mounting and start-up
5 Mounting and start-up
SAMSON control valves are delivered ready
for use. In special cases, the valve and actu-
ator are delivered separately and must be
assembled on site. The procedure to mount
and start up the actuator are described in
following.
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques on tightening
actuator components. Excessively tightened
torques lead to parts wearing out quicker.
Parts that are not tightened far enough may
loosen.
Observe the specified tightening torques
(
u
See associated valve documentation for ad
-
ditional mounting instructions.
5.1 Mounting the actuator onto
the valve
Proceed as follows if the valve and actuator
have not been assembled by SAMSON:
Remove the mounted actuator before mount
-
ing the other actuator (see section 9.2).
The valve 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 nameplate (see
section 2.1).
1. Loosen the lock nut (10) and stem con-
nector nut (9) on the valve.
2. Press the plug together with the plug stem
firmly into the seat ring.
3. Thread down the lock nut and stem con-
nector nut.
4. Remove the clamps of the stem connector
(A26/27) and the ring nut (A208) from
the actuator.
5. Slide the ring nut over the plug stem.
6. Place the actuator onto the valve bonnet
(2) and secure it with the ring nut.
7. Apply a signal pressure to the actuator to
extend the piston rod.
8. Screw on the stem connector nut (9) by
hand until it touches the piston rod (A1).
9. Turn the stem connector nut a further
quarter turn and secure this position with
the lock nut (10).
10. Position clamps of the stem connector
(A26/27) and screw them tight.
11. Align the travel indicator (84) with the tip
of the stem connector clamp.
NOTICE
!
Note
Note
Tip