6.4
Valve with Detachable Pipe Connection Elements
This section describes the procedure to fit the valve.
Caution!
Liquids in pipes
Danger of injury due to liquid spraying out
► Therefore, before releasing any pipe connections or clamp connections:
drain the pipe and, if necessary, clean or rinse it.
► Separate the pipe section in which the valve is to be fitted from the rest
of the piping system to prevent product entering again.
Carry out the following steps:
1.
Fit valves with detachable pipe connection elements – using suitable
connection fittings – directly into the pipe system.
®
Valve is installed.
6.5
Valve with Welded Ends
This section describes the welding procedure for the valve housing.
Warning!
Spring tension in the valve
Danger of injury when opening the clamp connections on the actuator or on
the housing as the released spring pretension will suddenly lift the actuator.
► Therefore, release the spring tension before detaching the clamp
connections by pressurizing the actuator with compressed air at maximum 8
bar.
Notice
Seals are wearing parts
Old seals will cause malfunction of the valve
► When fitting the valve be sure to fit new housing O-rings.
Carry out the following steps:
1.
Release the spring tension.
2.
Remove the valve insert, see Section 10.5, Page 39 and Section 10.6,
Page 47.
3.
Install housing without gaskets
4.
Flush the housing with forming gas from the inside to push the oxygen out of
the system.
5.
Fit the housing into place and tack it.
6.
Weld the housing into the pipe system; use welding filler if necessary.
7.
Passivate the seam after welding.
8.
Remove the housing.
Assembly and installation
Valve with Detachable Pipe Connection Elements
430BAL008430EN_4
08.03.2022
29
