1.RoHS certified machanical Oil Level Regulator 2.High quality Oil Level Regulator; 3.Reasonable price; 4.High pressure Product Intrduction:ZR-OLR mechanical oil leval regulator operate a floating valve and control the oil level from compressor crankcase. The oil level setup is 1/2 of sight-glass position , if it is lower than this position , floating operation valve will open from oil receiver ...