Samson 3372 - Product Operation Guidelines; Service Modes and Manual Control

EB 8313-3 EN 7-1
Operation
7 Operation
The work described in this section is only to
be performed by personnel qualied for the
assignment accordingly.
Risk of fatal injury due to the ignition of an
explosive atmosphere.
Incorrect installation, operation or servicing
of the electropneumatic actuator in poten-
tially explosive atmospheres may lead to ig-
nition of the atmosphere and cause death.
Î The following regulations apply to instal-
lation in hazardous areas: EN60079-14
(VDE0165, Part1).
Î Work must only performed by personnel
who has undergone special training or
instructions or who is authorized to work
on explosion-protected devices in haz-
ardous areas.
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 nger 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.
See associated mounting and operating in-
structions for additional instructions on oper-
ation, e.g. uEB8394 for Type3725 Posi-
tioner or uEB8367 for Type4744 Limit
Switch.
7.1 Throttling service
The Type3372 Pneumatic Actuator is de-
signed for a maximum supply pressure of
6bar when used for throttling 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).
DANGER
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
Note