IR compressor run nearly non-stop and the dryer continually dump air?

by W. H. Leakey
(Ashland, WI)

Hi Bill,

We are in the seed business and use compressed air to:
1. Operate two scales using 2 CFM at 80 PSI
2. Run blow guns (2) to clean out bins, elevators, etc. I have spent enough time on your (most excellent) site to understand I need to know how much we are using for this purpose, but don't have that at this time.

I can say that the need is more than our 5 HP, 2 stage, I-R Model 2940 w/ 14.8 CFM @ 40 PSI AND 60 gallon tank can put out. One man with an air gun can pretty much run it down. So I understand we are at the limit of this machine.

Back to the original Q. The compressor is housed in a ~6x8' room. There is no 'fresh' outside air available, so the room gets pretty warm (hot). The unit is piped to an I-R dryer. The phenomenon is that the compressor runs pretty much not stop, even when we are not using air and the dryer is dumping air on a regular basis in what appears to an effort to keep up with the compressor. We burn out about a motor a year and need to get this fixed. What's up with our system?

Sincere Regards,
W. H. Leakey
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Hi there W. H. Leakey.

Put a grate or vent in the door to allow air ingress, for sure, or if the room has a ceiling that is under the roof, then put a grate in the ceiling. In, both door and ceiling would be good, the door grate at the floor to allow cool air in, the grate in the ceiling to allow hot air out.

What is the normal cut in and cut out pressure of this IR air compressor?

Leave the door open while it's running, so it has enough air, and monitor the tank gauge(s). What pressure are they reaching with no air being used?

Try briefly running the compressor with the intake filter removed to ensure that a plugged intake is not the problem.

All other things being eliminated, I'm suspecting a gasket or valve failure on the pump, particularly if the tank pressure never approaches the normal cut out pressure setting.

Bill

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Jun 01, 2013
Situation Perhaps Misstated
by: Seed Bill

Bill,
I trust you will read this and comment.

In rereading my Q of yesterday, and talking with the guys most familiar with the unit, does your answer change if it is the dryer continually dumping air, thus causing the compressor to work non-stop?
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Possibly. I don't have details of your dryer, but it sounds like it is a regenerative, and it uses air to regenerate the media. If the control or the valve to vent the drying air is stuck open, then yes, it would be bleeding air pressure from the compressor tank and the compressor might never get to cut out.

B.

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IR - ssr wont load

by bob
(boston ma)

ssr wont load

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Bill says...

Bob, IR makes a pretty broad range of air compressors in the SSR family.

If you could post the model number as a comment here, that would help other folks with the same model provide info if they could.

You are saying that the air compressor is running, but there is no pressure being developed as it is unloaded, and when the system calls for air, the compressor won't load up and begin providing compressed air?

Cheers,

Bill

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