... ,IDF 4)ISO9001:2000 1000PCS a week,sanitary flange connection butterfly valve sanitary flange connection butterfly valve1)Material : AISI304, AISI304L, AISI316, ... to the stainless steel pipeline system4)Connection: flange5)Certificate:ISO9001:20006)Application :dairy produce,brewery,food, ... forms:often closing type,often opening type is pneumatic or manual typeWenzhou Yuanyu Mechanical Co., Ltd. ...