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Topic: Protection valve cut off psi (Read 388 times) previous topic - next topic

Protection valve cut off psi

Can anyone confirm the opening pressure for the protection valves on our brake tanks? I thought it was 80psi but I just pulled one of mine off and it was 70psi.

1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Protection valve cut off psi

Reply #1 –
I believe 60 psi is minimum. have seen many 65 psi. ones on trucks. You just want the pressure to be above the maxi brake pressure.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Protection valve cut off psi

Reply #2 –
Try this thread for ideas:

Air Leak from this valve

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Protection valve cut off psi

Reply #3 –
Quote from: Chuck & Jeannie –
You want a valve that closes at about 65 psi:
Thanks, this is what I needed. The one that was on there opens at 70 and closes at 65, so I'm going to go with that. Not sure where I got the 80psi from.

Thanks for the quick response guys
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Protection valve cut off psi

Reply #4 –
I put a new regulator in (among other things) and set it to 80psi. New symptoms have me thinking my issue is a pressure switch. I split it out into a new thread: Pressure switches on front sixbag/bags
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.