2200900961 is an inlet valve rebuild kit that contains all parts needed to rebuild the inlet valve on the Chicago Pneumatic QRS 10 and QRS 15 rotary screw air compressors that have a serial number starting with ITJ. This will also fit many of the Quincy QGS 10 and QGS 15 rotary screw compressors as well.
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 refered to as an Unloader Repair Kit using part number 2200 9009 61 or 2200-9009-61. Your parts manual may state a description for this part as KIT SPARES UNLOADER C55
2200900961 is an OEM part manufactured by Chicago Pneumatic / Quincy (sister companies of each other). There were several different inlet valve repair kits used on the QRS and QGS range of rotary screw compressors - please contact us if you would like to confirm this is the correct item for your air compressor.