speed air 4b221 - takes about 15 mins to reach 80 psi

compressor takes about 15 mins to reach 80 psi. when i turn of moter pressure bleeds out the filter.note compressor has set un-used for one year.after the second operation of compressor the amount of sir coming out of filter has reduce alot.but their is still some air coming out.


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Bill says...

Hi there. It is unusual for air to bleed out of the air filter, which is commonly in the discharge line before the regulator.

Could it be that you mean that the air is bleeding out of the UNLOADER VALVE which is often right beside, and operated by, the PRESSURE SWITCH?

Unless, of course, you mean the air intake filter, which cleans the air that is being pulled into the intake port on the pump.

That being the case, you probably have an intake valve failure.

Please post your response as a comment here so I can follow the thread.

Cheers,

Bill

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Daton 3Z960 question CFM and PSI

Would like to know what is the CFM and PSI For Daton moldel 3Z960

it has a 5horse 1phase

Any Info would be of great help
Thanks Jack
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Jack, I tried to find specifics, much like you I guess, and couldn't.

I expect you should get around 20 CFM of compressed air at 90 PSI from your compressor, based on the motor size.

I would also expect an upper pressure in the 120-150 PSI range.

Hope this helps.

Cheers,

Bill



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May 19, 2015
Dayton air compressor M3z964a
by: Anonymous

Looking for a starter relay switch. It is a 2 stage,ccw,5.0hp,single phase,175psi compressor.Serial#120689L-056920

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speedaire 3Z421 PRV - I need to know the PRV psi

I need to know the PRV psi for my 3z421.
the current on is opening around 135 psi and the motor stops running at 140 psi.

Thanks

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Bill says...

This is a compressor that may be 25-35 years old, I think.

Not that this matters, and, it may be a good thing, as it is possibly made in North America.

If your compressor normal cut out is 140 PSI, and this hasn't changed, then, regardless of the spec of the PRV, you need to change yours out (or clean it up to help it work properly) for one that pops off at about 20 PSI higher than the normal cut out of your compressor.

That should be safe.

Cheers,

Bill

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