Not sure if my old SpeedAire Compressor (1Z286E) has PRV (pics included)

by Justin

model 1Z286E Speedaire air compressor

model 1Z286E Speedaire air compressor

model 1Z286E Speedaire air compressor
model 1Z286E Speedaire air compressor
model 1Z286E Speedaire air compressor

Hi there I have an older Speedaire air compressor that I picked up at a yard sale, its model 1Z286E, with compressor model 2Z157B, with the 1/2 HP electric motor.


It does not look like it has a PRV valve. It does have push slide valve? Im assuming that is a type of cutoff valve? Im new to air compressors.

If this one doesnt have one can I add one pretty cheaply? Can you take a look at my attached photos to see if everything looks to be there?
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I don't see a PRV either, though I cannot see the back side of the Speediare air compressor.

In the first photo of the manifold I see what appears to be the tank gauge to the right. The red-knobbed item I take to be where the regulator is / was, though I'm puzzled as to the fact that you don't have a regulator gauge.

Protruding to the right of the red cap is what looks to be a capped line. If it is, that's a good spot for the PRV, as it would "read" the tank pressure satisfactorily from that spot.

If what is located at the red cap area is not a regulator, that's where I would install one, so that you could regulate the air pressure coming out of the discharge coupler to the left in the image.

I shown a link below where you can obtain PRV's if you wish. Hope this helps.

Bill




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Comments for Not sure if my old SpeedAire Compressor (1Z286E) has PRV (pics included)

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Jun 16, 2014
hex thing
by: Doug in s.d.ca

Yes, but from what we can see, (need more pix, obviously) it's got the pressure switch and gage mounted together, and I believe that cross looking piece contains the check valve, and the hex thing is on the pump side, before the check, so a PRV would not see the tank pressure there...

Jun 15, 2014
PRV, etc
by: Doug in s.d.ca

The PRV is likely directly on the tank, if it exists, unless it was removed and plugged. It would usually be by itself, near the top of the tank.

There should be a drain near the bottom of the tank, as well.

If it had a regulator (perhaps not) it would be right before the hose coupler.

The red thing is a valve.

The hex head thing with a small hole is to indicate pressure between the head and the tank.
If it's is extended, there is pressure. When not running, it should retract. Unless I'm wrong about that, it is not a suitable place for a PRV.

Pix looking to the top and flywheel sides might help...
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Thanks for the good info, Doug.

If the "The hex head thing with a small hole " is a pressure indicator, and the compressor has a tank pressure gauge right beside it, I wonder why the PRV couldn't be threaded here? The pressure gauge would indicate pressure, the PRV would react to over pressure I would think.

Bill

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