For fluorinated-lined or rubber-lined valves, are gaskets still required on the end flanges?
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For fluorinated-lined or rubber-lined valves, are gaskets still required on the end flanges?
It is not necessary; the flange surfaces of fluorinated-lined or rubber-lined valves already have a sealing layer, so additional gaskets are usually not required. .
It is generally not necessary, unless the other end is made of a different material and shims are needed to protect the end face
No need, unless it’s not tight enough, then add another one