Assembling Valve And Actuator - Samson 3274 Mounting And Operating Instructions

Installation
Note
The mounting position of the valve deter-
mines how the actuator is mounted (see as-
sociated control valve documentation).
Tip
We recommend installing valves in sizes
larger than DN 100 upright with the actua-
tor on top to facilitate valve maintenance.
Î Observe the clearance required to re-
move the cover or entire actuator (see
dimensional drawings in section 8).
4.2 Assembling valve and ac-
tuator
Proceed as follows if the valve and actuator
have not been assembled by SAMSON, pro-
ceed as follows (Fig. 3):
Î Check whether the actuator stem is re-
tracted.
Î Perform electrical connections of actuator
with electric override (section 5). Discon-
nect isolating terminal 81 and retract the
actuator stem electrically (section 6.1).
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.
Î For versions with "actuator stem extends"
fail-safe action, the power supply must
remain connected to L and N while
12
mounting the actuator to keep the actua-
tor stem in the top end position.
DN 15 to 80 (Series 240)
1. Replace the stem connector nut (9.3, with
an external Ø10 mm) on the valve plug
stem (9.5) with a Ø16 mm nut (order no.
0250-0674).
2. 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).
3. Place the actuator onto the valve bonnet
and secure using the ring nut (8.1).
4. 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.
5. Move the valve to the end position and
align the travel indicator scale (9.2) with
the tip of the stem connector.
DN 100 to 150 (Series 240, 250, and 280,
K 40 to 160)
VS
1. Check dimension x = 90 mm. If neces-
sary, readjust by turning the stem con-
nector nut (9.3).
2. Place actuator onto the valve bonnet and
secure using the ring nut (8.1).
3. Fasten the stem connector nut (9.3) and
actuator stem (5.6) to the stem connector
clamps (8.2).
4. Move the actuator stem to the lower end
position. Align the travel indicator scale
(9.2) with the tip of the stem connector
(8.2) and screw tight.
EB 8340 EN