The 39492558 blowdown valve is a 2-way 3SV solenoid valve. Connects back to the separator which allows the oil resevoir to be depressurized. The Ingersoll Rand 39492558 blowdown valve bleeds off sump/separator vessel pressure when the compressor goes into the unload mode. This depressurizes the system so the compressor is not at full pressure when not running loaded.
Several of the following series rotary compressors utilized this load solenoid valve however some models did have different valves depending on the year made. Please contact us with your serial number and we can verify this is the correct item for your Ingersoll Rand rotary screw compressor.