Samson 3271-5, Mounting And Operating Instructions

Page: 35 / 52

EB 8310-1 EN 35
Operation
(A5.2) in the bottom diaphragm case
(A2).
11. Place the springs (A10) in the bottom di-
aphragm case (A2), centering them in
the intended recesses.
12. Place on the top diaphragm case (A1).
13. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20).
14.
Type 3271‑5:
Connect the signal pres-
sure as described in section 5.2. Un
-
screw the vent plug (A16) from the bot-
tom signal pressure connection and
screw it into the top connection (S).
Type 3277‑5:
Connect the signal pres-
sure as described in section 5.2.
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. As a result, the actuator
stem retracts opposing the spring force
as the signal pressure increases.
15.
Affix a new nameplate with changed
symbol and new configuration ID to the
actuator.
16. Mount the actuator on the valve (see sec-
tion 5.1).
A73
A74
A72
A70
A1
A5
A7
A1 Top diaphragm case
A5 Diaphragm plate
A7 Actuator stem
A70 Lock nut
A72 Adjustment nut
A73 Cover
A74 Lock nut
Left half: Actuator stem retracts (FE)
Right half: Actuator stem extends (FA)
Fig. 10:
Travel stop