EB 8310-8 EN
25
Operation
6 Operation
Crush hazard arising from moving parts (ac‑
tuator and plug stem).
Do not insert hands or fingers into the yoke
while the valve is in operation.
Risk of personal injury when the actuator
vents.
Wear eye protection when working in close
proximity to the control valve.
Operating disturbed by a blocked actuator
stem.
Do not impede the movement of the actuator
stem by inserting objects into its path.
6.1 Throttling service
The Type 3271 Pneumatic Actuator with
1400-250 cm² actuator area is designed for
a maximum supply pressure of 6 bar when
used for throttling service.
6.2 On/off service
In on/off service, the supply pressure must
be limited depending on the bench range or
signal pressure range of the actuator. The
applicable bench range or signal pressure
range which the actuator can move through
is written on the nameplate (see section 2.1).
Additional points that apply concerning op-
eration:
Î
Label actuators with reduced supply
pressure with a sticker ("Max. supply
pressure limited to ... bar").
Î
Only apply the signal pressure to the sig
-
nal pressure connection (S) on the dia
-
phragm chamber of the actuator which
does not contain any springs (see Fig. 2).
Î
Only use vent plugs that let air through
them (16 in Fig. 2).
6.3 Reversal of the direction of
action
Î
Contact SAMSON's After-sales Service
department if the direction of action is to
be reversed.
WARNING
!
WARNING
!
NOTICE
!