How does a screw compressor work?

A screw compressor can run loaded ('pumping air') or unloaded ('idle'). The inlet/loading valve opens and closes according to air demand. The inlet valve is controlled by a solenoid valve that supplies control air to the inlet/loading valve. Check solenoid valve coil and solenoid valve operation.

How do I know if my rotary screw air compressor is flooded?

You should also do an oil sampling. Persistent moisture in an oil sample is the best indication that your compressor is oversized for your application. Fluid sampling is critical to the life of an oil-flooded rotary screw air compressor. Sampling oil regularly will tell you whether it is being exposed to excessive heat or taking in contaminants.

Why is fluid sampling important for a rotary screw air compressor?

Fluid sampling is critical to the life of an oil-flooded rotary screw air compressor. Sampling oil regularly will tell you whether it is being exposed to excessive heat or taking in contaminants. It can also detect excessive bearing wear, allowing you to be proactive when you uncover a problem, even avoiding an unplanned shutdown.

What should I do if my air compressor is too low?

If the capacity of the air compressor is really too low, check the following: Check differential pressure over oil separator. Replace separator when necessary. Check and replace compressed air filters (if installed). Compressor does not unload. Check if pressure switch is correctly set and working.

How do I know if my air compressor is working?

If you have a compressed air dryer, check the dewpoint. Check the current draw with a current clamp meter. If the motor draws exeessive current: Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any 'hickups' (be sure to completely shut down the air compressor!).

Are rotary screw air compressors good?

Rotary screw air compressors are designed for a 100% duty cycle. Run them significantly less than that, and you’ll waste energy. Oversizing is the leading cause of rapid cycling, which occurs when your compressor turns on and off constantly and causes equipment failures and downtime.