... sealing:viton KL0311 4 way electronic valvesMainly used in air compressor to control loading,off-loading,pressurizing,decompression,inlet,exhaust automatically ... construction and viton seal.It is 4/2 way solenoid valve (one inlet port,2 working ports,one exhaust port). it is ... same with function of one 2/2 way (NC type) and one3/2 way solenoid valve. it can reduced the ...