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Bleed valve on air compressor?

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Old Jul 11, 2004 | 03:58 PM
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Bleed valve on air compressor?

I have a Campbell Hausfeld 7HP/60 Gal. compressor. On the pressure activated power switch, there is a small needle valve that is activated when the pressure is reached and the power is shut off. When power is on, the needle valve is closed. Can't imagine what the purpose of this is? Any ideas? Just looking to satisfy my curiosity.

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Old Jul 11, 2004 | 09:49 PM
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Some setups use that to bleed air out of the compressor output port so the motor won't have a load when it starts.
 
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Old Jul 12, 2004 | 05:40 PM
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On my CH 7HP/60 gal it is the unloader valve as Mike W says. I've had mine since '91 and only thing I have had to do to it was change the check valve yesterday.
 
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Old Jul 12, 2004 | 08:12 PM
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I assume my check valve is toast. As the bleed valve will eventually bleed down the entire tank. All I can find for check valves here are some for $20 CDN, and they dont look like exact replacements. Where abouts did you get yours?
 

Last edited by laka; Jul 12, 2004 at 08:42 PM.
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Old Jul 12, 2004 | 10:58 PM
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try www.chpower.com (or www.campbelhausfeld.com) manual is avail plus service center near you. I think they had a min. charge so I bought 2 check valves.
 
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