... Description Mainly used in air compressor to control loading,off loading,pressurizing,decompression,inlet,exhaust automatically. It has the character of high ... media purity because of piston construction and viton seal. It is 4/2 way solenoid valve (one inlet port,2 working ports ... with function of one 2/2 way (NC type) and one 3/2 way solenoid valve. it can reduced the cost of material ...