WEKA_IOM_C-0068_TgxV_DN250_PN6_EN / 17.04.2020
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6.4
Installation welding of the housing
The valves must be carefully welded in by spot welding and minimum energy input to avoid deformation due
to thermal distortion at the valve housing. The valve housing may be cooled with a damp cloth during
welding. After spot welding, it is recommended to first weld on the fluid pipes and then the vacuum flange.
Ensure cleanliness during work. Pollution at the valve seat or at the guide areas may be the reason for
malfunction or functional failure of the valve.
Step
Picture
Description
1
Fix the thread part in the valve plate with
3 welding spots.
2
Spot-welding of pipes with 3 spots around
the circumference.
3
Weld the pipes with as low heat input as
possible.
If required, cool with a damp cloth.
4
In order to prevent tube
tension, the welding points
should now be removed.
Now weld another 3-6 tack sports at the
thread part and subsequently carefully
finish the weld joint. Check the housing
again for distortion.
