MadModder
The Breakroom => The Water Cooler => Topic started by: AdeV on December 19, 2012, 10:37:06 AM
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Does anyone know where in the UK I might get hold of a proper - preferably adjustable, or fixed at 125psi - pilot valve? at least, I _think_ that's what it's called; basically, once the air pressure in the receiver reaches the set pressure, this valve pops open; and sends a small amount of pressure to the valves on the top of the compressor which stop it compressing. I thought it was called an unloader valve, but that does something else...
Basically, my compressor is engine driven, so rather than trying to stop/start the engine when the pressure varies, the pilot valve simply shoves a pair of small valves open on the compressor head which prevents it from adding more air to the tank. When the pilot valve drops shut, the compressor kicks in again.
I recently bought a 3phase compressor which had such a device on it, but that's over with the racing cars (and is in use on the compressor); I've been relying on a safety valve, but it's not ideal.
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Ade
try googling for a compressor unloading valve
Stuart
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Yep, done that. Most unloader valves (all the ones I found in the UK) are designed to actuate a switch to switch off the motor, and the valve decompresses the compressor itself, so it can be restarted without overloading the motor.
This is the sort of thing I need: http://www.ebay.com/itm/Air-compressor-unloader-control-pilot-valve-95-125-psi-/270710543911
It just seems daft that no-one in the UK seems to sell them...
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Maybe this could be of help
http://www.motherwelltankprotection.co.uk/pressure-relief-valves/breather-valves/pressure-relief-valves.
Regards, Matthew
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Ade, heavy trucks and other equipment that have air brakes use such a system to control the air supply. You might see if they have something you can use.
Joe