Kunkle blow down valve

Mike(NEOhio) · Aug 24, 2014

This valve is on a compressor and set to 125 psi but leaks even at low pressure. I tried turning it upside down, filling it with solvent and pushing the plug down so the solvent ran through but it didn't help. Are there any steam engine guys or boiler operators out there that know how to service it? It's a Kunkle Type 1 or Type 2. It looks like the collar has a rivet keeping it on and I don't want to take it apart till I know more about it.

Steve@Advance · Aug 24, 2014

Is this valve located on the tank or the intercooler? Is it a single or 2 stage compressor?

alg · Aug 24, 2014

Buy a new one,it's a throw away.Even if you could open it up and lap in the seat,it will still need to be reset to 125 psi.

NCWayne · Aug 25, 2014

Your best bet will be to get a new one. Mcmaster Carr has them for anywhere from about $60 for the ones with the lever to around $35 for the plain type.
McMaster Carr

Mike(NEOhio) · Aug 25, 2014

Steeve, it's a single stage engine drive. I have a tee on the tank inlet with the blow down on one side and the unloading valve on the other.

Kunkle blow down valve

Mike(NEOhio)

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Steve@Advance

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alg

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NCWayne

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Mike(NEOhio)

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