Hi GAL02,
IMO your question is more suitable for PSV forum
. Of course some of us in this forum have experiences in safety valve.
Agree with LittleInch in regards with the steam and that you should be clear of what you / your plant intentions are. Currently is not.
For example:
What is the testing pressure medium and temperature (P/T)? How many safety valves are you talking here and type? Is it close loop or to atmosphere?
And is this only testing pressure or you want to adjust the safety valve(s) as well?
See some hint from some expert whom have done this
. Moral of the story, this is a risky job with some uncertainties, be cautious for operator to position themselves when performing this. If your safety valve is open loop, do not position any parts of someones' body in front or near the outlet
some reference for safety valve in general.
For gaging as well as adjusting it in relatively safe manner, Trevi-test is one way to do it. similar video by Tru-test
Be cautious that you or the commissioning personnel should correspond both safety valves' setting pressure vs the testing pressure. If its gagged (set the screw to prevent it from opening)at X Psi, then the testing pressure is not advisable to exceed 5% of X. this potentially bent the spindle. And if this happened, as per safety regulation the damage parts shall be renewed with UV stamped (read: original) manufacturer parts (if your safety valve manufacturer and your boiler are referring to ASME).
Kind regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected
