Reed valves - need to source

by Barry Hanna
(Franklin NC 28734)

Mod # 3Z406H 1

Ser # 1207881-040551
Speedaire unit
1HP
CCw rotation
Where can I get new Reed valves for this compressor???
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Bill responds...

Hello Barry:

Please visit the Speedaire Parts Information Page and follow the guides to locating your local supplier of Speedaire compressor parts.

Cheers,

Bill

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Mar 13, 2009
Reed Valves /Flapper Valves
by: Barry

Thank you Bill. I called Grainger and the young lady was very helpfull she found the air pump and the flapper valves for me I always called them reed valves. so I am good to go.







You are most welcome, Barry.

Cheers,

Bill

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Pliot (pilot) valves question.

by muluken
(ethiopia)

ok currently i am working with a project work on robotics which have contrloed by fully pneumatic
then if u can give be discription and working principle about external pilot valves.
tanks
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Hi Muluken. One of the things I love about the web is that I can get a question like this from Muluken in Ethiopia. Very, very cool.

Muluken, I'd like to help you out, but I'm not really sure what information you are looking for.

Let me suggest that you visit these pages:

Entry information about air valves.

Detail about solenoid and pilot operated valves.

If these pages don't provide enough information, write back and ask a specific question, please.

Cheers,

Bill

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quincy model 230-32 air leaking from intake

if i hold my finger over a inlet hole in the air filter air is being sucked in and blown out.

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Good day, Mr. Dubois...

From your brief but precise description, I would say that your intake valve is failing, or has debris lodged in it, preventing it from closing when the compressor is trying to pump air into the tank.

Instead, the compressor is huffing and puffing. Not very efficient, and, in time, your compressor will build little, if any, pressure in the tank at all.

Needs to be fixed, sooner than later.

Cheers,

Bill

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air delivery valve oil leakage

by chandru
(singapore )

air delivery valve oil leakage, what is the problem .. ?

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Bill says....

Chandru:

If what you are saying is that the valve that controls the air to your application is leaking oil, then the oil must be coming down the air line to the valve.

Is there an air lubricator in the circuit.

If you could provide a bit more information, I may be able to point at other things, but I really don't have enough information about your application to do that.

Cheers,

Bill

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Compressor wont build pressure in tanks

by Nic Hill
(East Peoria, IL USA)

It pumps air, as verified by removing the line from pump to tank. Check valve in line was OK. Holds air pressure in tank when line to pressure control is removed and capped. I can feel it leaking out of the switch on and off area ( assuming this is the pressure control) when switched off.

What can I test and how can I fix?

Thanks

Nic

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Bill says...

Nic, the compressor is pumping, and air is not building up in the tank, right?

While the compressor is running, get close to, listen to, or feel the outlet from your unloader valve. Is it bleeding air?

If it is, your check valve is either not seated properly, or it has failed.

Cheers,

Bill

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Aug 30, 2010
Re. check valve problem???
by: Nic

Thanks for the quick reply. I assume the unloader valve is the valve at the end of the plastic tube coming fom the T at the check valve. It leaks occasionally but not regularly when I was testing it. I took apart the line and check valve and all appears well. How tight is the tension in the spring spposed to be? I cannot budge it blowing into it but I can depress it with a nail. Do you think its the check valve I need?

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If the check valve has a flawed seat (maybe some debris preventing it closing) , then air will blow out the unloader valve continuously.

If it's intermittent, that may signal an intermittent check valve issue, again, maybe debris.

Check out the Unloader Valve page linked from the site map or Valve page for more details on their operation.

Cheers,

Bill



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MY AIR COMPRESSOR TANK LEAKS.

by MAX
(BRAMPTON)

IT WORKS, SETTING, GAUGE IS FINE BUT IT WOULD NOT GO FARTHER THAN 60 PSI AND AS SOON AS I SHUT IT OFF IT LOSSES ALL THE AIR INSIDE AND THE WAY IT SOUND IT IS LEAKING AIR. SOMBODY TOLD ME I HAVE TO CHANGE THE GASKET BUT I DO NOT KNOW WICH GASKET I SHOUD CHANGE.
THANKS.

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Bill says...

Max, hi. From the sound of it, I don't think it's a gasket that's your problem. I think it's your check valve.

Folks commonly think of as a pressure switch problem, but it turns out to be the check valve on your compressor. Read the pages on this site about pressure switches and check valves for more info.

Cheers,

Bill


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on off on off - kellogg american air compressor

by Ed
(Danville VT)


I have a seasoned kellogg american air compressor with a square D 9013fhg12x pressure switch. I have to use the circuit breaker as an on off switch because if I leave the breaker on, the compressor motor will run untill the tank reaches shut off pressure. When it does shut off, the air comes out of what i believe is a check valve connected to the pressure switch. After a while the check valve closes, and the motor starts up again. It does this when not in use, so if the breaker was to remain on, the compressor would just continue to drain and refill the tank which is not very efficient. Any ideas?

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Bill says...

Hello Ed. This is the second question today with the same problem, and the same answer. It's also a symptom that I get plenty of questions about. My air compressor fills to cut out, then air bleeds out the unloader valve until the compressor has to start again to re-build pressure.

Click the Valves button on the nav bar to the left, and then read the page "COMPRESSOR TANK CHECK VALVES. " I think this page will answer your question for you. If not, please comment here and we'll explain further.

Cheers,

Bill

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Gradually increasing pressure from a static source

by David
(Ohio, USA)

I work in a liquid refinery. Our air compressors run at about 100 psi. In our refinery, there are air actuated valves that snap closed when there's a problem. The quick snap of the valve closing causes liquid that was moving through the lines at 60 gallons per minute to come to a complete stop, creating a great deal of back pressure. Recently, we've had some cracks developing in the lines because of the stress of these valves closing so quickly. Is there something along the lines of a regulator that would allow the valve to gradually close over the course of say, 3 seconds, instead of pretty much instantly?

Thanks!

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Bill says...

David, I think you are describing a valve that is designed to "fail closed", and it uses a spring to accomplish this operation when the air supply that keeps the valve open is shut off, whether on purpose or by loss of system pressure.

The solution is to use a double acting valve too, but one that opens and closes using air pressure, rather a spring on the close cycle. Then, you can meter the air out of the exhaust port on the close cycle, and that will slow down the valve, reducing or eliminating liquid hammer.

The issue then, of course, is what happens if you lose all of your air in the system? The valve will not move, and it's no longer "fail close".

The solution to that is to build some redundancy into the circuit, so that in the event there is a system wide air loss, a reservoir close to the valves in question will provide enough air to close the valves that need closing.

Hope this helps. Thanks for writing in.

Cheers,

Bill



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Holding the air pressure until i release it

by Jay
(Canada)

My air compressor builds air pressure and when its done filling. It starts leaking out the air...

It seems like air is coming out of some pipe by the on off switch..

Isnt the air supposed to stay in until i release it or use an air gun?

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Bill says...

Hello there Jay.

Yup, when your compressor pump fills the tank with air, it is supposed to stay in the tank until you either use the air with an air tool or some such, or you open the tank drain valve and empty the pressure.

Visit the Valves page, click on the Check Valve link. All will be explained.

Cheers,

Bill

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1960 Brunner compressor valve issue

by Scott
(Wier, Quebec, Canada)

I recently purchased an old Brunner two stage model 229. Upon taking off the head to check the reed valves(as it would only pump to 10lbs then blow thermal cutout on motor),I found that both in the second stage are shot. I've thought about making my own, but was wondering about installing check valves instead.One from the first stage to second, and one from second to tank. Any thoughts?
Thanks

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Bill says...

Scott, in theory, it should work fine. Practically speaking, the supply of, and proper installation / plumbing of the check valves might be problematic.

The manufacturer uses reed valves because they are pretty basic, and cheap!

I suspect from your description though that you may have more than a reed valve issue, unless the valve to the tank were completely blocked. Sounds like you may have a motor issue too.

Cheers,

Bill

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Dec 15, 2010
Update
by: Scott

Just an update.I spent a day making my own reed valves from a ring compressor I had lying around, and new gaskets also. Put it all back together and it pumps nicely to the cutout pressure.

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Glad to hear it, Scott.

Bill


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Air leaking through the intake filter

by Nick
(Baltimore)

This is a Champion 3Z172. Air is leaking through the air intake. Compressor pumps up fine but takes about one minute to leak down to 90 lbs and then compressor comes on again.

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Bill says...

Inside the port that the intake filter is threaded into is one or two "flapper" or "reed" type valves. Their purpose is to open to allow air to be pulled into the compressor chamber, and they should close when the piston pumps the air into the tank.

If you have air coming out the intake filter, then your valve(s) are failing, and ultimately, air will simply pump in and out of your intake port and none will go into the tank, and your compressor will never shut off.

If you aren't comfortable opening up the pump head to have a look (it might be just debris preventing the valve from closing) then it's time to take your compressor to a repair depot. See a list under "Repairs".

Cheers,

Bill

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