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Thread: Back Pressure Valve
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18-03-2006, 08:37 AM #1
Back Pressure Valve
Hi all,
Somebody has idea the application of back pressure valve (ex. PM3 of danfoss)?
Is this applicable on glycol system?
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18-03-2006, 09:04 AM #2
Re: Back Pressure Valve
Hi Guapo
The Danfoss PM3 is a modular valve, the PM3 is a 3 Port main valve with room for 3 pilot valves. PM valves are now being replaced by Danfoss, with the ICV range, same pilots, but an improved main valve, better part load performance, less bounch open - closed due to the v ports in the barrel around the gas entry point.
I have used the PM3 on evaporators as pressure regulators to stop fluid freezing, or as crankcase pressure regulators to stop compressor overloading on hot start-ups
Kind Regards. Andy.
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18-03-2006, 04:38 PM #3
Re: Back Pressure Valve
My first question is... why is the back-pressure regulator being added?
It will certainly work on a glycol chiller or water chiller for that matter.
If the valve is being added to keep the evaporating temperature of the chiller at a higher pressure to prevent freezing, I suggest you might have other problems that should be investigated.
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