Preparation For Installation; Mounting The Actuator - Samson 3274 Mounting And Operating Instructions

5.2 Preparation for installation

Before installation, make sure the following
conditions are met:
− The actuator is not damaged.
Proceed as follows:
Lay out the necessary material and tools to
have them ready during mounting.
NOTICE
!
Risk of actuator damage through opening
the device.
Î Do not unscrew screws on the top hous-
ing cover.
Î Do not open the top housing cover.

5.3 Mounting the actuator

Proceed as follows if the valve and actuator
have not been assembled by SAMSON, pro-
ceed as follows (Fig. 5-2):
Î Check whether the actuator stem is re-
tracted.
Î Perform electrical connections of actuator
with electric override (see section 5.7).
Disconnect isolating terminal 81 and re-
tract the actuator stem electrically (see
the 'Operation' section).
Î For versions with mechanical override,
press the button on the top of the hous-
ing. Use an Allen key to operate the
rack-and-pinion gear to retract the actu-
ator stem.
EB 8340 EN
Note
For versions with "actuator stem extends"
fail-safe action, the supply voltage must re-
main connected to L and N while mounting
the actuator to keep the actuator stem in the
top end position.
DN 15 to 80 (Series 240)
3. Replace the stem connector nut (9.3) on
the valve plug stem (9.5) with an exter-
nal Ø10 mm with a Ø16 mm nut (order
no. 0250-0674).
4. Turn the stem connector nut (9.3) and
adjust the dimension x to 75 mm with a
closed valve and tighten lock nut (9.4).
Tightening torque
5. Place the actuator onto the valve bonnet
and secure using the ring nut (8.1).
Tightening torque
6. Push the plug stem (9.5) upward. Con-
nect the stem connector nut (9.3) and ac-
tuator stem (5.6) using the stem connec-
tor clamps (8.2) and fasten together us-
ing the screws.
7. Move the valve to the end position and
align the travel indicator scale (9.2) with
the tip of the stem connector.
Installation
150 Nm
150 Nm
5-3