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Pressure regulator for air compressor

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chris smith

04-06-2003 12:57:12

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The regulator doeasn't work on my recently acquired air compressor. If you turn the knob out the air bleeds out the bleed hole continually.. tighten it down and it quits.. I took it apart and here is what i found. There is a needle like valve stickiing up from the base, looks to be spring loaded. Then in the top part which is what unscrewed, there is a plastic disk with an o-ring, then a spring then a metal disk which is pressed on as you screw in the handle. Any ideas how to fix this?? I tried oiling it and it still don't work. I can live with it not working, but it would be nice if it worked..

Thanks guys.. Chris

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David

04-08-2003 12:32:54

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Re: Pressure regulator for air compressor in reply to chris smith, 04-06-2003 12:57:12

I also have seen them installed with the airflow going in the wrong direction. Is there any directional indication on the body of the unit?

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T_Bone

04-07-2003 22:19:46

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Re: Pressure regulator for air compressor in reply to chris smith, 04-06-2003 12:57:12

Hi Chris,

This regulator is differential pressure regulator. P#1 is line pressure and P#2 is the reduced pressure.

The needle valve seats P#1. The plastic disc with O-ring is P#2 diaphram and is the seal. Setting the P#2 puts pressure on the metal disc pushing on the spring and that apply's differential pressure to seat the neddle valve. As P#2 is reduced this allows the needle valve to open allowing flow from P#1. As the pressure builds in P#2 then this apply's pressure to the disc again shutting off the needle valve of P#1 supply.

With the o-ring leaking is whats letting air bleed from the hole. Could be a bad o-ring or a scored bore. This is also keeping the regulator function from working.

T_Bone

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Jack

04-06-2003 17:48:09

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Re: Pressure regulator for air compressor in reply to chris smith, 04-06-2003 12:57:12

Try a new regulator--they're probably cheaper than fooling with the old one. Harborfreight, Home Depot, Lowe's

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Central Minnesota

04-06-2003 16:20:12

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Re: Pressure regulator for air compressor in reply to chris smith, 04-06-2003 12:57:12

Are you sure that the airflow was the right direction through the regulator. I've seen some do what you described when installed backwards. Just guessing.

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chris smith

04-07-2003 15:15:19

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Re: Re: Pressure regulator for air compressor in reply to Central Minnesota, 04-06-2003 16:20:12

The regulator is built in. Can't easily replace it.. Any more ideas??

Later.

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