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Always follow standard safety procedures when working on a valve.
Flush the pipeline before installing the valve. Debris allowed to
remain in the pipeline (such as weld spatters, welding rods, bricks,
tools, etc.) can damage the valve.
After installation, cycle the valve a minimum of three times and re-torque
bolts as required.
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Ensure that the valve is in the open position and the inside of the
body bore of the valve body/body end is coated with a suitable spatter
guard.
The post weld heat treatment must be localized. Make sure to keep
intense heat away from the main portion of the valve (seats and ball).
Do not cover valve in stress relieving blankets. The temperature of
the main body section should not exceed the rated valve temperature.
In certain applications, it may be necessary to remove all internal
'soft' material because of contractor heat treatment requests.
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Velan recommends detailed procedures when automating Velan Ball valves
in the field. Please consult Velan for
these procedures.
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