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I have 2 CP compressor having FAD capacity of 105cfm.these two compressors are loaded unloaded by single load unload valve.it is tripping frequently show ''high discharge air temperature''.what could be the problem on machine?

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I have dealt with this problem at work you have a restriction on your air out put and your comp. is doing what is called short cycling

Posted on Jun 23, 2009

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I have a Model# SSR-EP10 IR compressor that wants to start loaded, if I release the load it fills up and then cuts off with out going to unload and then when it calls for air it try to start loaded.


How are you unloading it? There is an unloader valve that is usually a manual lever connected to the regulator. 0531-051 - DIAPHRAGM,UNLOADER for Ingersoll Rand compressors

May 24, 2015 | Air Tools & Compressors

1 Answer

Ingersoll Rand 3 hp air compressor builds correct pressuse but trips rest when called to restart. Changed starter and running capasitors but no change in problem.


You need to check the head unloader.
Compressed air that is trapped over the piston when the compressor shuts off will be evacuated to atmosphere through the unloader valve, to prevent that compressed air pressure from adding load to the start up of the compressor motor, when the pressure switch again calls for air. For example, the last time you did a sit-up, you may have folded your arms over your chest, or if you are particularly masochistic : - ) , even held a weight to your chest. What you were doing is increasing the load against which your muscles have to work to effect the sit up.
Compressed air, captured in the cylinder after the compressor shuts off, would increase the load against which the electric motor would have to work. It may increase the load too much, and the motor may fail to start, or it may pull too many amps and fry a fuse or pop a breaker in the panel.
When the compressor shuts off, the unloader valve operates, it unloads the trapped air to atmosphere, and that problem is solved.
The unloader valve is plumbed somewhere in the line between the compressor and the compressor tank.
It is often part of the pressure switch assembly. It will, in many cases, be opened by the pressure switch, when the air in the compressor air tank reaches the set point and the pressure switch trips the power supply to the motor off, and at the same time, trips the unloader valve to open.

it is normaly on the bottom of the pressure switch it will have a small tube hooked to it



1_4_2012_7_59_34_pm.jpg

Jan 04, 2012 | Air Tools & Compressors

1 Answer

Compressor builds correct pressure but will trip rest before it can restart.


You need to check the head unloader.
Compressed air that is trapped over the piston when the compressor shuts off will be evacuated to atmosphere through the unloader valve, to prevent that compressed air pressure from adding load to the start up of the compressor motor, when the pressure switch again calls for air. For example, the last time you did a sit-up, you may have folded your arms over your chest, or if you are particularly masochistic : - ) , even held a weight to your chest. What you were doing is increasing the load against which your muscles have to work to effect the sit up.
Compressed air, captured in the cylinder after the compressor shuts off, would increase the load against which the electric motor would have to work. It may increase the load too much, and the motor may fail to start, or it may pull too many amps and fry a fuse or pop a breaker in the panel.
When the compressor shuts off, the unloader valve operates, it unloads the trapped air to atmosphere, and that problem is solved.
The unloader valve is plumbed somewhere in the line between the compressor and the compressor tank.
It is often part of the pressure switch assembly. It will, in many cases, be opened by the pressure switch, when the air in the compressor air tank reaches the set point and the pressure switch trips the power supply to the motor off, and at the same time, trips the unloader valve to open.

it is normaly on the bottom of the pressure switch it will have a small tube hooked to i

1_4_2012_8_01_50_pm.jpg

Jan 04, 2012 | Air Tools & Compressors

1 Answer

HIGH TEMP ALARM, UNLOADING AND THEN LOADING OVER AND OVER.


Please check your cooling system including the oil. It may time to replace the oil.
Also please check and set your load - unload pressure to wider range to prevent load-unload in short cycle.

Regards, Jay

Apr 26, 2011 | Eaton 1" Air Compressor Check Valve

2 Answers

I HAVE ZT30 ATLASCOPCO AIR COMPRESSOR.THE FAULT PROBLEM ON IT NOW IS THAT IT DOES NOT COMPRESS(LOAD) AND DISCHARGE (UNLOAD) AUTOMATICALLY, IT LOADS AND UNLOAD ONLY IF I MANUALLY OPEN THE MANUAL VENT...


It sounds like the unload valve might be clogged up. Try taking it off anf cleaning it back up. If the compressor is older or has had a lot of use sometimnes when the rings wear oil and gunge will get into the valve and gum it up. good luck

Mar 10, 2011 | Air Tools & Compressors

1 Answer

Need a point setting for ao smith air compressor ac motor model number opa-0297 s# c56b72b2316508j2 work on air machine with motor installed motor will hum and trip breaker can we set points to stop trip...


There is not a point setting for air compressors. The pressure switch can be adjusted. Remove the cover from the pressure switch. Adjust the nut tighter for a higher cut off pressure or looser for a lower cut off pressure. It sounds like the compressor is trying tostart under load. If the unloader valve is not working, the compressor will draw excess amperage and do what you describe. The unloader valve releases the pressure in the cylinder at the end of the run cycle so the compressor can start the next run cycle under no load.

May 14, 2010 | AO Smith 2 Hp Spl 3450rpm M56 Frame...

1 Answer

Ingersoll rand air compressor 185


How old is the compressor ? This trouble shooting is directed to the vane and screw types of air compressors.

Caution,
For exact information on the equipment you are working on, go to the manufacturer’s maintenance and repair manual.

Here are some possibilities.

Compressor does not reach design pressure or capacity:
Air Pressure safety valve is leaking
Receiver air valve is open
Unloader valve is leaking
Loose Piping or fittings

Compressor will not load or unload:
Unloader valve defective
Air control valve is sticking or dirty
Unloader pressure is improperly set too high or too low
Water in the control lines
Plugged control lines

The air compressor CFPM is low:
Dirty air compressor air filter
Defective air intake control valve
High idle on power source improperly set
Damaged or worn rotor blades

Nov 23, 2008 | Air Tools & Compressors

3 Answers

Compressor is loading without unloading


hi mate it could iver be a faulty load solenoid valve or the unloader its self is jaming up inside which means you have to strip it away from the air end and replace all the seals inside or give it to a specialst we are compressed air engineers we could sort it i will leave you a number call us anytime 07958354730 or call 01752 848801 many thanks

Jun 08, 2008 | Kano Technologies Atlas (K752HCDR) DVD+R...

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