PRV pops before the compressor stops
by Ken Rimington
I have an IR T-30 5HP vertical compressor. The pressure switch is a 174 PSI switch and the PRV is 175 psi. That seems pretty close to the cut-off pressure. I do not need 175 PSI pressure, so I was thinking as follows:
1. Replace the pressure switch with a 150 psi switch.
2. My compressor does not have an un-loader pilot valve, so I planned on getting a pressure switch with one.
3. I would replace the check valve assembly with a piloted check valve and plumb it with copper tubing to the pilot valve in the new pressure switch.
Is this plan OK and safe or are there precautions that I should take?