... DIN, 3A,etc Material:AISI304, AISI316L Technical parametersreversing valve(reverse flow valve,valve with manual overridel)Size: DN25-104and 1”~4”Standard:ISO ... , DIN, 3A,etcMaterial:AISI304, AISI316LConnection:welded, male, clamped,Working Principal:manual ... special request. OEM is welcome too. Sanitary manual reversing valve (BLS)