Auto Drain Trap

The auto-drain trap is there to get rid of water in the air. Water in the air receiver is bad news long-term for the receiver, for it will corrode and lose strength, and for any equipment downstream that relies upon the working fluid being compressible. Also possible is the risk of freezing-up, depending on operating, local climate and weather conditions. It sounds like the air compressor maintenance regime requires improvement. If there is dirt in the air, look closely at the air compressor's inlet filters. Renew or clean as appropriate. If there is oil in the air, look closely at the air compressor's oil seals. Renew or clean as appropriate.

Is the compressor overdue for replacement (rhetorical question)? Can its replacement with a more modern, cleaner design be justified on the basis of a predictable reduction in the maintenance burden downstream (rhetorical question)?

Thanks for your comments! Can you able to elaborate more on Balancing line?

What I did, I have connected one end to the top cover of the trap and other end to the receiver. Is it ok? does balancing line will work or not due to the same pressure on the trap and in the receiver? In such case will there be any circulation of air?

The configuration is correct. Were the balancing line not there, the trap would not work. The balancing line is there to equalise the pressures both sides of the valve in the trap, so that the trap, which probably works on the float principle, operates on the liquid level only and doesn't have to overcome the air pressure in the receiver as well in order to drain the water.

Air will not circulate, as such, as there is no fan in the balancing pipe, and were there to be any circulation it would not matter greatly.

If there is a significant amount of water in the air as it leaves the compressor, it may be worth evaluating the installation of an air dryer so as to protect the receiver and the downstream equipment, for reasons already discussed? Such equipment probably works on the principle of adsorption of moisture by dessicants.

You did all what was possible with any mechanical air trap. Try using an electrical - the one with a timer & solenoid valve. The timer settings can be done easily since now you 've experienced alot of problems.The blast discharge from the timed-solenoid air trap may solve your problem. These are available with Spirax Sarco/ Armstrong?TLV.

The air and oil in reciever is bad news, and is indicative of the health of the system.

The water and oil should be eliminated before the air reciever.

Can you describe the entire system? hope air driers and oil/particulate filters are installed after the compressor and look for punctured heat exchangers if it is a water cooled compressor.

Also look at the PM on the air reciever. what are the internal inspections carrried out on the reciever? The corrosion on the innner walls may be part of the problem causing clogging.. Water inside the air reciever can cause rapid deterioration of the wall thickness of the reciever and my be disastrous wrt safety ,needless to say about end use equipment.

Below the air receiver and above the auto drain trap there must be a Y-stainer as without this the port of the auto drain trap is being choked in every few min interval. First you have to select the Y- stainer screen perporation size according to the auto drain trap port size as such a way that no particle would be perporated through the strainer having size greater than the auto drain trap port size, only then your problem will besolved.