Compressor PRV Valve Opens
When a compressor PRV valve opens, this can be scary. The PRV is, of course, the pressure relief valve.
For folks that are not quite sure about what a PRV is and does here's info about compressor PRV's.
It is one thing when your compressor runs, will not stop, and will not build compressed air pressure. It's an entirely different matter when the compressor runs, and runs, does not stop, is building compressed air pressure all the while, and eventually pops the pressure relief valve to vent too-high pressure.
If you have a PRV problem may I ask that you please see all the questions and answers already posted about this subject below, as I suspect that you will find that someone else has already written in about what you are experiencing.
If your PRV problem is not noted already, there's a form below to ask a question about what to do when your compressor PRV blows. Fill in the form and we'll see if we can help.
And, if you've got a suggestion about solving the "compressor PRV valve blows" problem for someone else, either comment on their post, or start your own thread by using the form.
Thanks,
Bill
Ask What to do when your Compressor PRV Valve Blows!
Please read the postings at the bottom of the page to see if it's already covered. If not, tell us about your problem.
Some of the reasons why your compressor PRV valve opens.
Click below to see the problems others have said when their compressor blows its PRV valve open.
PRV pops every 1/2 second until compress turns off. Hello, my tank which max at 175 psi, will run and shut off normally, except PRV at the start of intercooler pops air every 1/2 second or so until the compressor ...
Curtis E57 compressor relief valve pops the pressure relief vavle on the head of my curtis e57 compressor pops off when full pressure is reached. it will continue for a short time, the factory ...
PRV reliefs at around 70 psi. My compressor initially was not shutting off and I could feel air escaping in the general vicinity of the PRV. It is old so I thought the PRV might have ...
THE PRV KEEPS POPING OPEN BEFORE THE PRESSURE CAN BUILD UP THE PRESSURE RELIEF VALVE KEEPS POPING OPEN BEFORE THE TANK GETS A PROPER CHANCE TO FILL UP WITH AIR. IT HAS A 75 PSI RATING. CAN I MOVE UP TO A 125 PSI ...
hitachi compressor runs until PRV blows I have a Hitachi 2HP/4 Gallon twin tank compressor. It builds pressure. My problem is it keeps running until it blows the PRV valve. The pressure drops ...
75 PSI pressure valve popping on cross line?
Speedaire 7.5 hp upright compressor has a 150 psi tank mounted PRV that is ok.
By the head, there is another PRV that is 1/8 npt and 75 psi rated. I have ...
AIR VALVE ON COMPRESSOR POPPING OFF
AIR VALVE TO LET PRESSURE OFF HEADS FOR START UP WILL POP OFF EVER 10 SECOND UNTIL COMPRESSOR STARTS BACK UP.
Bill ponders...
Hmmm. Let ...
Relief valve on discharge line What is the purpose of the relief valve on the discharge cross over line on a 2 cylinder compressor? Thanks
Sears compressor 12 yr old blows pressure relief valve.
My Sears compressor cutting-off pressure is not working.
Also when trying to inflate the tires of my SUV it isn't doing anything even though good air ...
PROBLEM with a compressor PRV I have a 1.7 hp 25 gal compressor, recently while using the compressor to blow some vacume filters clean, the safety valve began bleeding the tank when ...
pressure relief valve popping before 120 psi
pressure relief valve popping before 120 psi
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Bill says....
Karl, it is pretty hard to give you any advice when I don't have ...
safety valve dumps air
when it reaches 8 bar it dumps air till it reaches 6bar then keeps repeating the process with the motor running constantly
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Bill ...
PRV Frequently operated. we are using 3 stage compressor. we are replacing crank shaft connecting rod assembly and cooler. there after 2 nd stage cylinder PRV is frequently operated....
Pop-off valve opens on start I've got a portable, belt-drive compressor (Coleman/Sanborn) that works fine except the pop-off valve opens when the compressor starts up (auto start, switch ...
Pressure Relief Valve blowing off before set pressure is reached I have a porter cable, 6 gallon air compressor. My problem is that the pressure relief valve will blow at about 130-135psi. The pressure shut off valve ...
compressor wont turn off
compressor kicks in but wont shut off even after prv blows and after switching off , I must turn off at breaker panel.
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Bill ...
3 Stages Compressor PRV blowing off
The 2nd stage of my 3 stages air compressor is blowing off. what could be the prolem here.
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Bill says...
Garnet, pretty ...
worn out in-tank PRV bypass?
I have a large 10 hp/150 gal. tank Speedaire compressor and the in-tank pressure release valve is shop.
I cannot get a replacement for 7 days and I ...
blow off safety valve third stage opens
Safety valve for third stage is blowing off
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Bill says...
Holy cow, Victor, you really don't provide a whole lot of information,...
Emax 3hp air compressor blowing PRV valve
hi
my 50L 3HP compressor builds up pressure to the recommended 8 bar or beyond. it then blows the prv valve until the pressure drops down to about 5 ...
Relief valve blows at 100 lbs I have a Speedaire 80 gal 7.5 Compressor. The releif valve on the head blows at 100 lbs while compressor is running trying to make pressure. Is this a ...
Small prv fluttering.
I have a BIG craftsman compressor. The 80 gallon one. Has a 2 cyl, Cast iron V twin style pump.
Just a few days ago the little 70 psi prv on the head ...
PRV blowing... I have a 3hp single phase Charnwood 106 compressor for painting a car I'm working on - little used (off eBay). Unfortunately the PRV blows when the pressure ...
prv valve releases pressure yet compressor continues to run i have an older sears 100 psi air compressor. Everything works fine except when it gets to 100 psi, the prv value releases and the compressor continues ...
Pressure Relief Valve I am glad this site is here! I recently "horse traded" for an older 20 gallon Speedaire compressor. Soemwhere along the way somebody swapped the original ...
PRV keeps blowing I have a Central Pneumatic 21 gallon, vertical,oil lubricated air compressor. Model 94667. 4.9 SCFM at 90 PSI, 4.5 HP, runs at 120 volts with a single ...
Pressure dropped and won't rise again.
Hi I have a campbell/hausfield pancake compressor.
I was useing it the other day and it was setting idle after it had pressured up. I heard a little ...
Blowing off valve I have a 5Z630 air compressor and the pop off valve that is located on the center cylinder blows off continually while running. My question is: What causes ...
Speedaire comrpessor PRV source I have a Speedaire compressor, Model # 3Z124C and the spring loaded pressure relief has gone out and needs replacing. I am looking for the part and price....
PRV valve pulsing
The aftercooler prv valve pulses air out while running. I think it may be a stuck valve.
Bill comments...
Howdy, and thanks for writing ...
Why does my pressure release valve open?
I do not know how to adjust the pressure release settings so the safety valve does not blow for a Speedaire 5Z185A. Thanks
Chris daniel
cdaniel677@...
