3Z182 valve flutters while compressor is on?

by MARK STOVER
(LANGEHORNE, PA)

Speedaire compressor Model Number: 3Z182 (Photo: www.weiku.com)

Speedaire compressor Model Number: 3Z182 (Photo: www.weiku.com)

i HAVE A SPEEDAIRE 3Z182 COMPRESSOR THAT WAS POPPING OFF THE 70 PSI VALVE ON THE SIDE. WE REPLACED IT AND THE SAME THING HAPPENS. IT STILL BUILDS PRESSURE AND SHUTS OFF WHEN FULL.I WAS WONDERING IF THAT VALVE ON THE FRONT OF THE COMPRESSOR HAS ANYTHING TO DO WITH IT.

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Howdy Mark.

Sorry chum, I don't know what you mean by a "POPPING OFF THE 70 PSI VALVE ON THE SIDE"?

This is a twin cylinder air compressor. Are you, perhaps, talking about the PRV between the cylinders? If that is the case, based on what you write, it isn't the PRV that is the problem, but likely the valve inside the second cylinder where the line between the two enters. That is an intake valve, and if it is compromised, back pressure in the line from the first cylinder may cause the PRV to pop off.

Can you post a closer photo of the Speedaire 3Z182 valve you are referring to? You may need to open a new thread to get the photo-upload window.

Thanks,

Bill

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Sep 03, 2010
East Texas resolves fluttering PRV valve issue
by: Terry

Looking at a photo of the 3Z182, and determining that it is a 2 stage compressor pump, I have to assume that what you are talking about is the pressure relief valves on the intercooler tubes connecting the LP pistons with the HP pistons.

They are probably located on the intake manifold itself of the HP piston.

I suspect that the reason one of the pressure relief valves is "popping off" is because of a cylinder intake valve failure, most probably on the intake side of the high pressure piston.

If this happened, when the HP piston came up to compress the air out of the cylinder, some air is leaking back through the closed intake valve into the intercooler tube and creating a higher than normal pressure causing the pressure relief valve to exceed its 70 psi rated capacity, and it released.

Thats why a new valve did not change it.

There is also a pressure relief valve on the HP exhaust or discharge manifolds, but these are rated higher than 70 psi, because the normal pressure exiting the HP piston is quite a lot higher than for a 70 psi relief valve that you seemed sure of the psi rating.

The valve could just be dirty and carboned up, or could be damaged. Many times the cylinder valves can be cleaned and reused.

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Thank you, Terry.

B.

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What is value of Speedaire Air Compressor Model 3Z323C?

by Chris DiPaola
(Long Island NY)

I have a used Speedaire compressor model 3Z32C. I can't find it listed anywhere. Would you know about how much it is worth? It is in good condition.
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Chris, there are so many models of so many compressors, no way I can give you details of any one from a model number.

Second, I searched too, and cannot find any info on your Speedaire 3Z32C compressor. Not knowing what its motor HP or the tank size really limits even an educated guess. :-)

If it were me, I would go to the compressor store and have a look at the prices for a new compressor of similar size and power supply.

If yours is in as good a condition as you state, what would be the value? Maybe 1/3 of the new price?

I know that most DIY air compressors of today are so low priced that I expect I'd pay $150 for new with a warranty over a used one of the same make for $50 unless it ran really, really good.

Cheers,

Bill

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4b236b pump is on until it opens PRV

by pfc H
(st. louis mo USA)

so the pumpwill stay on past the desired pressure.

that in turn kicks out the pressure releife valve.

so what is going on and how do i fix it so my compressor is ready for use all of the time and i dont have to shut it off at the breaker when I get some pressure in it just to use it for a bit?

( sorry about any errors in spelling and that this key board is wise beyond its years)i also want to say its a 4b236b compressor
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Howdy... I'd like to say that I'm wise beyond my years too, but no, I'm just old!

Typically your compressor problem would be cause by a failed pressure switch. When the tank pressure reaches the normal cut out pressure setting, it's supposed to trip open, and cut the power to the motor.

You also don't have to shut off the compressor, as long as you realize that if you have a leak in a fitting then periodically the compressor will start on it's own when enough air has leaked out. Mine started up in the middle of the night... once! The boss was not impressed. Now I shut it off by pulling the power cord.

Cheers,

Bill

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Nov 11, 2013
in response
by: pfc h

The pressure switch is about a two months old. But when its turned on, it basically stays on even threw the relief valve. I have to shut off the breaker to make it stop... if it is the pressure switch do you think granger would warranty it?
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Sorry, I have no idea. You'd need to ask Grainger.

B.

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breaker popping

by Dave
(White Cloud, Mi. US)

When the motor starts the conduit will shake and then the breaker pops.

Line run is approximatley 150' of 10 Gauge wire. It is on a 30 Amp breaker.

Electrical company came in and changed a part on the motor so it would switch from capacitor start to the hard wire line. That has helped but the condiut still shakes during start up.

The motor runs at 12 Amps during the run.

Any ideas would be appriciated.

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Feb 05, 2014
overload
by: Doug in s.d.ca

Is this a new installation?

120 volt?

Personally, for that long a run, I'd rather see 8 gauge wire, but that's just me. What you have is up to code.

As to the shaking - what is holding the conduit up?

Finally, can you put a voltmeter on a hot lead near the motor end of the circuit and check the voltage at startup? That will give a clue.

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