Operation; Normal Operation; Manual Operation - Samson 3351 Mounting And Operating Instructions

7 Operation

Immediately after completing start-up or put-
ting the valve back into operation, the valve
is ready for use.
WARNING
!
Risk of burn injuries due to hot or cold
components and pipeline.
Valve components and the pipeline may be-
come very hot or cold. Risk of burn injuries.
Î Allow components and pipelines to cool
down or warm up to the ambient tem-
perature.
Î Wear protective clothing and safety
gloves.
WARNING
!
Risk of personal injury due to pressurized
components and process medium being
discharged.
Î Do not loosen the screw of the test con-
nection while the valve is pressurized.
WARNING
!
Risk of hearing loss or deafness due to loud
noise.
Noise emission (e.g. cavitation or flashing)
may occur during operation caused by the
process medium and the operating
conditions. Additionally, a loud noise may
briefly occur through the sudden venting of
the pneumatic actuator or pneumatic valve
accessories not fitted with noise-reducing
fittings. Both can damage hearing.
EB 8039 EN
Î Wear hearing protection when working
near the valve.
WARNING WARNING
! !
Risk of personal injury due to exhaust air
being vented.
While the valve is operating, air is vented
from the actuator, e.g. during closed-loop
operation or when the valve opens or closes.
Î Wear eye protection when working in
close proximity to the control valve.

7.1 Normal operation

The handwheel of valves with actuators fitted
with a handwheel must be in the neutral po-
sition during normal operation.

7.2 Manual operation

Valves with actuators fitted with a handwheel
can be manually closed or opened in the
event of failure of the auxiliary energy sup-
ply.
Operation
7-1