Rotary Screw Air Compressors.
Inlet Valve Pneumatic cylinder to operate butterfly type inlet air control valves.
For Ingersoll Rand Screw Air Compressors
Modify Inlet control valve for FuSheng Rotary Screw Air Compressors.
Valve seat change to Teflon seat !!!!
Note: the upper seat !!!!
We have done it for model: SA -37. Compressor will not fully off-load and oil vomit out from air filter when shut-down (OFF).