42385955 inlet valve rebuild kit contains all parts needed to rebuild the inlet valve and many Ingersoll Rand IRN 20-40hp rotary screw air compressors. It is recommended to use this kit every 8,000 hours or 2 years. If your compressor is slow to build air or it leaks from the inlet valve, this kit may solve the issue. Often times this is refereed to as an Unloader Repair Kit. This kit is specifically used on the 'Nirvana' variable speed drive rotary screw air compressors manufactured by Ingersoll Rand.
42385955 is an OEM part manufactured by Ingersoll Rand. Please contact our parts department if you would like confirmation this kit will work with your air compressor.