... pneumatic flanged butterfly valve Material: SS304/316L connection: Flanged type:single effect(ON-OFF), double effect(air-air) Product Name: pneumatic flanged ... butterfly valveMaterial quality: AISI304, AISI304L, AISI316, AISI316LStandards: DIN, SMS, ISO, IDF, RJT, 3A, etcSpecification:DN15-200 and 1" ... range of specifications. OEM is welcomed. pneumatic flanged butterfly valve