Manual Operation - Samson 3273 Mounting And Operating Instructions

Operation
After the handwheel has been unlocked and
turned, the threaded rod rises or disappears
into the yoke. The travel is adjusted.

7.2 Manual operation

NOTICE
!
Risk of handwheel damage due to the use
of unsuitable tools.
Î To turn the handwheel, do not use any
additional tools, such as a lever or
wrench.
With mounted pneumatic actuator
1. To change from automatic to manual op-
eration, unlock the handwheel. Pull the
locking bolt and turn it 90° to unlock the
handwheel (see Fig. 11).
Fig. 11: Releasing the locking bolt
32
2. Turn the handwheel until the valve reach-
es its end position.
NOTICE
!
Risk of valve damage due to the use of
excessive force.
Î Do not turn the handwheel any further
by exerting force after the valve has
reached its end position.
Note
− The valve travel can only be reached after
the neutral travel of the handwheel has
been overcome. You will notice at this point
that the force needed increases.
− The turning direction depends on the
mounted valve (see Table 4).
EB 8312-2 EN