Preparation For Installation - Samson 3296 Mounting And Operating Instructions

Vent plugs
Vent plugs are screwed into the exhaust air
ports of pneumatic and electropneumatic de-
vices. They ensure that any exhaust air that
forms can be vented to the atmosphere (to
avoid excess pressure in the device). Further-
more, the vent plugs allow air intake to pre-
vent a vacuum from forming in the device.
Î Locate the vent plug on the opposite side
to the work position of operating person-
nel.

5.2 Preparation for installation

Before installation, make sure the following
conditions are met:
− The valve is clean.
− The valve and all valve accessories (in-
cluding piping) are not damaged.
− The valve data on the nameplate (type
designation, valve size, material, pres-
sure rating and temperature range)
match the plant conditions (size and
pressure rating of the pipeline, medium
temperature etc.). See the 'Markings on
the device' section for nameplate details.
− The requested or required additional
pipe fittings (see 'Additional fittings' in
the 'Design and principle of operation'
section) have been installed or prepared
as necessary before installing the valve.
EB 8074 EN
NOTICE
!
Risk of control valve damage due to incor-
rect insulation.
Î Only insulate control valves with insulat-
ing section or bellows seal up to the bon-
net flange of the valve body for medium
temperatures below 0 °C (32 °F) and
above 220 °C (428 °F). If the insulating
section is insulated, it will not function
properly.
Î Do not insulate valves mounted to com-
ply with NACE MR0175 requirements
and which have nuts and bolts that are
not suitable for sour gas environments.
Proceed as follows:
Î Lay out the necessary material and tools
to have them ready during installation
work.
Î Flush the pipelines.
Note
The plant operator is responsible for clean-
ing the pipelines in the plant.
Î For steam applications, dry the pipelines.
Moisture will damage the inside of the
valve.
Î Check any mounted pressure gauges to
make sure they function properly.
Î When the valve and actuator are al-
ready assembled, check the tightening
torques of the bolted joints (u AB 0100).
Components may loosen during trans-
port.
Installation
5-3