30
EB 8048-2/-3 EN
Mounting and start-up
Vent plug
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 workplace of operating personnel.
Î
On mounting valve accessories, make
sure that they can be operated from the
workplace of the operating personnel.
The workplace of operating personnel is the
location from which the valve, actuator, and
any mounted valve accessories can be ac
-
cessed to operate them.
5.2.2
Installing the control
valve
1. Close the shut-off valve in the pipeline
while the valve is being installed.
2. Remove any protective caps from the
valve ports before installing the valve.
3. Lift the valve using suitable lifting equip-
ment to the site of installation (see sec-
tion 4.2). Observe the flow direction
through the valve. The arrow on the
valve indicates the direction of flow.
4. Completely retract the actuator stem to
protect the plug from sparks during weld-
ing.
5. Weld the valve free of stress into the
pipeline.
6. Depending on the field of application,
allow the valve to cool down or heat up
to reach ambient temperature before
start up.
7. Slowly open the shut-off valve in the
pipeline after the valve has been in-
stalled.
Risk of valve damage due to a sudden pres
-
sure increase and resulting high flow veloci
-
ties.
Slowly open the shut‑off valve in the pipeline
during start‑up.
8. Check the valve to ensure it functions
properly.
5.3
Preparing for operation
Proceed as follows:
Î
Flush the pipelines.
Î
Check the valve to make sure it is clean.
Risk of contamination of the process medium
through the use of unsuitable lubricant and/
or contaminated tools and components.
−
Keep the valve and the tools used free from
solvents and grease.
−
Make sure that only suitable lubricants are
used.
Note
NOTICE
!
NOTICE
!
