High Pitch on Air Compressor

[bufordwon]

We have a 10 HP Ingersoll Rand 2 stage air compressor at work which is only 1 month old. We ran the air lines and built a enclosure around the compressor to quiet the compressor noise down. The problem is that at sometimes a high pitch like a tea kettle sound comes from around the regulator. We replaced the regulator and it does the same thing. Some thoughts like maybe the checkvalve may be having problems. We have 1 inch piping coming out of the compressor and it goes down to 3/4 inch to the regulator and out and is 3/4 inch piping down to 1/2 inch line. I don't know if I am in the right forum but I would appreciate any suggestions possble from anyone. Thanks from Cedar Rapids, Ia.

 

[itsmoked]

Did you replace the regulator with the same model or a different make/model?

Regulator rated for the CFM?

Why are you reducing the air line down to 3/4". You are supposed to keep the air velocity below a certain speed; 30m/s.(I think) You may be exceeding that by a lot. Could make some noise.

Others may have some ideas too.

Got a link to your specific compressor on the IR site?

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[waross]

Are you using a storage tank? If you are running the regulator on the discharge of the compressor without a pressure tank the regulator may be having trouble coping with the pressure pulsations coming from the compressor.
respectfully

 

[bklauba]

Take a look at downloader valve #2. Normally the factory puts a rubber gasketed fitting around the coupling, which sometimes get loose (or never was tight), and it might be acting like a reed in a saxophone or clarinet, causing the high pitch sound.

Sometimes I have seen (when the IR folks screw up) them put a compression fitting instead, which often won't seal.

BK

 

[zappedagain]

I had a noisy compressor once. I loosened the bolts that hold the air intake. It only took about a quarter turn and the noise went away. You never know what is going to resonate...
It has been running fine ever since.