Samson 3271, Оригинальное руководство пользователя, Страница: 39 / 72

EB 8310-6 EN 7-1
Operation
7 Operation
The work described in this section is only to
be performed by personnel qualified for the
assignment accordingly.
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,
air is vented during operation.
Î
Wear eye and hearing protection when
working near the actuator.
Crush hazard arising from the moving actu-
ator stem.
Î
Do not insert hands or finger into the
yoke while the air supply is connected to
the actuator.
Î
Before working on the actuator, discon-
nect and lock the pneumatic air supply
as well as the control signal.
Î
Do not impede the movement of the actu-
ator stem by inserting objects into the
yoke.
Î
Before unblocking the actuator stem after
it has become blocked (e.g. due to seiz-
ing up after remaining in the same posi-
tion for a long time), release any stored
energy in the actuator (e.g. spring com-
pression). See 'Relieving the spring com-
pression in the actuator' in the 'Removal'
section.
Risk of personal injury through incorrect
operation, use or installation as a result of
incorrect information on the actuator.
After any adjustment or conversion work, the
details on the actuator nameplate may no
longer be correct. This may apply, for exam-
ple, to the configuration ID or the symbol af-
ter reversal of the direction of action.
Î
Immediately renew any nameplates or
labels with incorrect or outdated infor-
mation.
Î
Add any new values to the nameplate. If
necessary, contact SAMSON to obtain a
new nameplate.
7.1 Throttling service
The Types 3271 and Type 3277 Pneumatic
Actuators with 240, 350 and 700 cm² actu-
ator areas are designed for a maximum sup-
ply pressure of 6 bar when used for throt-
tling service.
7.2 On/off service
In on/off service, the supply pressure must
be limited depending on the bench range or
operating range of the actuator. The applica-
ble bench range or operating range which
the actuator can move through is written on
the nameplate (see the 'Markings on the de-
vice' section).
Actuator stem retracts (FE)
For the direction of action "actuator stem re-
tracts (FE)", the permissible supply pressure
WARNING ! WARNING !
WARNING ! WARNING !
WARNING !