... stanard to meet ISO.BS.SMS.DIN.4A. Feature: sanitary U type diaphragm Valve 1)Material : AISI304, AISI304L, AISI316, AISI316L 2 ... handle 9)Three drive forms:often closing type,often opening type is pneumatic or manual type Wenzhou Yuanyu Mechanical Co., Ltd. is ... a professional manufacturer of high-precision hygiene grade valves, pipe fittings and ...