... 2) Meets ANSI,BS,DIN,JIS 3) Zero leakage Super Quality Butterfly Valve With Malleable Iron HandleProduction Range:SIZE: 50 ... and material)Suitable mediumFresh water,sewage,sea water,air,vapor,food,medicine,oils,alkais,salt etc.Typical ApplicationsHeating ... air-conditioning systems;Water purification system;Mining industry;Shipbuilding; ...