Notes On Possible Personal Injury - Samson 3730 Series Mounting And Operating Instructions

1.2 Notes on possible personal injury

WARNING
!
Crush hazard arising from moving parts.
The actuator contains moving parts (actuator stem), which can injure hands or fingers if
inserted into the actuator.
Î Do not touch the actuator stem or insert hands or finger into the yoke or beneath the
actuator stem while the air supply is connected to the actuator.
Î While working on the actuator, disconnect and lock the pneumatic air supply as well
as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into the yoke.
Î Before unblocking the actuator stem after it has become blocked (e.g. due to seizing
up after remaining in the same position for a long time), release any stored energy
in the actuator (e.g. spring compression). See section 'Relieving the spring compres-
sion in the actuator' in the 'Removal' chapter.
Risk of personal injury when the actuator vents.
The actuator is operated with air. As a result, air is vented during operation.
Î Install the control valve in such a way that vent openings are not located at eye level
and the actuator does not vent at eye level in the work position
Î Use suitable mufflers and vent plugs.
Î Wear eye and hearing protection when working near the actuator.
Risk of personal injury due to preloaded springs.
Actuators with preloaded springs are under tension. These actuators can be identified
by several longer bolts with nuts protruding from the bottom diaphragm case. These
bolts allow the spring compression to be relieved evenly on disassembling the actuator.
Actuators with considerably preloaded springs are also labeled correspondingly (see
Chapter 1.4).
Î Before starting any work on the actuator, relieve the compression from the preload-
ed springs. See section 'Relieving the spring compression in the actuator' in the 'Re-
moval' chapter.
If not described otherwise in the valve documentation, the work position for the control valve is the
1)
front view looking onto the operating controls (including valve accessories).
EB 8313-3 EN
Safety instructions and measures
.
1)
1-5