Help identify compressor part.

[David_S]

Hello all,

I have a 1967 Champion 2-stage 3hp 80 gallon tank. compressor with a part attached on the inlet side of the tank that I do not know what's purpose is. The very bottom has a very large hex plug that is leaking. I am wondering if I can delete it and just have the pressure relief valve. It is the larger item in the picture. Thank you for any help.

David

Also this is my first post.

 

[Dagny]

check valve? where 's it leak?

 

[NC Rick]

Welcome and that is an over pressure relief valve.

 

[930dreamer]

The hex (large???) might be a bear to remove, I'd use a long piece of pipe to help removing.

The round part is probably a one way flow valve.

 

[Millwrong]

Looks like a check valve with a relief valve attached.

 

[MKSJ]

The very large hex nut on the bottom is part of the check valve that holds the pressure in the tank. Release the tank pressure and take the valve assembly apart, you should be able to use some thread sealant and reinstall the hex nut. In addition the valves often will get debris, rust flakes, etc. and the check valve will not seal, so I would clean everything up. That is a very old style, the newer styles thread directly into the tank, if you have problems replace it with a newer style with a side port for a pressure relief valve.

 

[NC Rick]

I’m sorry, I tried to delete my post but it wouldn’t let me. I did an extremely poor job reading your post. I can’t think why a check valve would be needed but that’s my best guess also. I went right to the relief valve because my old compressor was given to me because the main and inter-stage relief valve springs had become soft and allowed leakage.

There are often reed valves in the head of the compressor so I wonder if a poppet check valve is employed in your compressor some how.

 

[The Cobbler]

check valve with an attached overpressure relief

you can replace it with readily available parts . just make sure =you match the overpressure to what's there . and a large enough check valve
you might be able to get it apart & clean it up to get it working again

 

[Millwrong]

I’m sorry, I tried to delete my post but it wouldn’t let me. I did an extremely poor job reading your post. I can’t think why a check valve would be needed but that’s my best guess also. I went right to the relief valve because my old compressor was given to me because the main and inter-stage relief valve springs had become soft and allowed leakage.

There are often reed valves in the head of the compressor so I wonder if a poppet check valve is employed in your compressor some how.

I think every compressor I've ever seen has a check valve between the pump and the receiver.

 

[NC Rick]

Admittedly, it has been over 30 years since I rebuilt mine but near as I can tell, there isn’t a check valve in this system. It’s just a pipe compression fitting going into the tank and the tube comes direct from the cylinder head.

 

[David_S]

Thank you to everyone that replied.
I have seen the inside and it doesn't look in the best of condition so I'm going to just replace it with the suggested newer style that goes into the tank.

Thanks again.

 

[Doug Arthurs]

Admittedly, it has been over 30 years since I rebuilt mine but near as I can tell, there isn’t a check valve in this system. It’s just a pipe compression fitting going into the tank and the tube comes direct from the cylinder head.

Your check valve is at the end of the pipe and is mostly inside the tank right at the top center.