EB 8310-5 EN
31
Operation
18.
Type 3271:
remove the vent plug (A16)
from the bottom signal pressure connec-
tion (S) and screw it onto the top connec-
tion.
Type 3277:
remove the vent plug (A16).
The actuator springs, which now push
against the diaphragm plate from above,
cause the actuator stem to extend. The
signal pressure is connected to the bot-
tom connection (S) on the bottom dia-
phragm case (over the yoke in
Type 3277). As a result, the actuator
stem retracts opposing the spring force
as the signal pressure increases.
19. Affix a new nameplate with changed
symbol and new configuration ID to the
actuator.
6.6 Version with handwheel
The stem connector (51) connects the actua-
tor stem (A7) with the actuator stem (A50) of
the handwheel. The actuator stem position
can be adjusted using the handwheel (A60).
See Fig. 9.
In Type 3271 and Type 3277 Pneumatic Ac-
tuators with 750 cm² actuator area and a
A60
A66
A51
A50
A55
A55
A51
A50
A60
A66
A50 Actuator stem
(handwheel)
A51 Stem connector
A55 Pointer
A60 Handwheel
A66 Lock nut
Fig. 9:
Type 3271 Actuator with handwheel (left: 175 cm², right: 750 cm²)
Summary of Contents for 3277
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