Safety Valve Servicing/Testing Facilities
Safety Valve Servicing/Testing Facilities
(OP)
There are PSV Test Stands being sold now which have a high pressure compressor feeding 1/2" tubing to the inlet of the PSV. These are being sold as certified for testing all sizes of PSV, via an adjustible clamp/flange assembly.
This is quite different than what I'm used to. I've always used a Test Bench with a large receiver so that there was enough volume to actually pop open all the PSV's up to the maximum set pressures and PSV inlet sizes as authorized in the organization's PSV QC Program.
Are these PSV Test Stands with pressure but without volume, acceptable for testing 'UV' stamped PSV's? Is it acceptable to just simmer a PSV when testing or is it mandatory to pop the PSV 100% open?
This is quite different than what I'm used to. I've always used a Test Bench with a large receiver so that there was enough volume to actually pop open all the PSV's up to the maximum set pressures and PSV inlet sizes as authorized in the organization's PSV QC Program.
Are these PSV Test Stands with pressure but without volume, acceptable for testing 'UV' stamped PSV's? Is it acceptable to just simmer a PSV when testing or is it mandatory to pop the PSV 100% open?





RE: Safety Valve Servicing/Testing Facilities
RE: Safety Valve Servicing/Testing Facilities
These little test stands do not have enough volume to pop open a PSV larger than 1" NPS. They just barely simmer the PSV. By just simmering the PSV, how would we know if there isn't an issue with the stem which could bind in guide, or the correct action of the sprint, etc.?
I am more used to organizations having facilities complying with API 576,with reservoir at least 12" (30cm) diameter, 6' (180cm) in length and with at least one test connection of 4" NPS.