PCV vs UG-126(b)
PCV vs UG-126(b)
(OP)
Hi,
Does a globe valve with a pneumatic actuator (like a PCV), controlled by a self-actuated pilot valve (upstream signal) and fail position open meets with requirements of UG-126(b)?
Best regards
Torsani
Does a globe valve with a pneumatic actuator (like a PCV), controlled by a self-actuated pilot valve (upstream signal) and fail position open meets with requirements of UG-126(b)?
Best regards
Torsani





RE: PCV vs UG-126(b)
The exception would be in certain services if such a setup is designed so it was at least as reliable as a pressure relief valve. An instrumented control system that replaces a PSV typically has to be SIL 2 or higher.
http://people.clarkson.edu/~wwilcox/Design/hipps.p...
RE: PCV vs UG-126(b)
https://www.law.cornell.edu/cfr/text/46/54.15-10
Dejan IVANOVIC
Process Engineer, MSChE
RE: PCV vs UG-126(b)
Therefore, the valve you describe does not meet UG126b.