GX CS3 pressure relief valve setting as safety backup

I some time ago, I reported that my CS3's pressure cut-off lead disconnected from the circuit board.

In this case, the cutoff function does not work and the compressor cannot shut off due to pressure.


Fortunately, the CS3 has an adjustable pressure relief valve that can be adjusted such that it will vent and thus limit pressure.

Does anyone else use this feature?

How do you address the potential for over-pressure from your compressor(s)?

Of course, the upper limit for CS3 pressure is the burst disk, but that blows at (?) 5.000 PSI which might be unsafe for some PCPs, but is still a feature. One could replace that with a lower burst pressure disk, were it not for the relief valve.

My CS1 clone, backup, demands that I monitor to some degree in case the pressure cut-off fails.

Another question: Has anyone knowledge of any PCPs that have failed due to overpressure? I admired my Kral Mega's burst disk.

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Thats a cool feature.

I have an external air/water separator filter that came with a 4500psi burst disk on it, and i eventually had to swap it for a 5k disk to stop it from bursting during fills. When it blows, it scares the crap out of you! The filter came with extra brass disks, but after having it burst a few times, it became a nuisance not a feature.

So that's why compressors have 5k disks not 4500 psi.

A pressure vessel can definitely handle more pressure than its rated for. If a gun is 250bar thats the operating pressure not what the gun can handle before rupture. In the event of an accidental overfill, you would just need to drain some air out before using it. There should be a safety factor engineered into the design.
Scba carbon fiber tanks are 4500psi max fill, but every 5 years they are hydrostaticly tested to over 7000psi.

The only pcp cylinder I've had fail was an evanix viper. The aluminum air tank developed a tiny hairline crack, very hard to see. I only filled it to 250bar. That was probably a manufacturing defect in the material. Failures can happen.