Actuator With Handwheel - Samson 3277 Mounting And Operating Instructions

Reversing the operating direction (fail-safe action)
Proceed in the same manner for the Type
3277-5 Actuator intended for the micro-
valve, but additionally attach the bushing
(2.1) for mechanical travel stop.
The springs now press from the top against
the diaphragm plate and cause the actuator
stem to extend (fail-safe action).
The actuator stem only starts to retract when
the signal pressure overcomes the force of
the springs.
9. Record the changed fail-safe action on
the nameplate!

2.1.2 Actuator with handwheel

(Type 3277 only, see Fig. 5)
1. Undo lock nut (20) and relieve the
springs (6) by turning the handwheel
(17).
2. Loosen threaded pin (26) and unscrew
coupling nut (25) from the coupling
(22).
3. Knock out the clamping sleeve (23) and
remove the ring (24).
4. Unthread the ring nut (15) and lift off
the flange part (21) with coupling nut
(25).
8
EB 8311 EN
Reversing the fail-safe action "actuator
stem extends" to "actuator stem retracts"
Proceed as described in section 2.1.1.
However, use the word "spindle with nut
(27)" in place of "nut (1)".
After reversing the operating direction:
1. Replace the flange part (21) with ring
nut (15) and coupling nut (25).
2. Tighten ring nut (15), then attach ring
(24) with clamping sleeve.
3. Screw coupling nut (25) as far as it will
go onto the coupling (22) and secure
with threaded pins (26).
Reversing the fail-safe action "actuator
stem retracts" to "actuator stem extends"
Proceed as described in section 2.1.1.
However, use the word "spindle with nut
(27)" in place of "nut (1)".
After reversing the operating direction:
1. Place the flange part (21) with ring nut
(15) and coupling nut (25) back again.
2. Tighten ring nut (15), then attach ring
(24) with clamping sleeve.
3. Screw coupling nut (25) as far as it will
go onto the coupling (22) and secure
with threaded pins (26).