.Solenoid valve(1/8" 1/4" 3/8" 1/2"3/4" 1" 1-1/4" 1-1/2" 2") 2.ISO9001:2000 CCC CQC CE 3.Integrity based,quaity first 1.CE,ISO9001-2008,ROHS 2.Diaphragm seal structure 3.Easy maintenance 4.Good waterproof performance 5.Normal Closed This guiding type valve adopts the diaphragm seal structure,with zero differential pressure starting function,large flow,simple structure,easy maintenance,good ...