... EPDM seat 1.size: 2"-24" 2.material: cast iron, carbon steel A Type Cast Iron Wafer Butterfly Valve With Handle PN10/PN16 EPDM ... flow rate and low flow resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament, oils, acids, alkalis, salts ... used as a device to cut-off or regulateApplyFresh water, sewage, sea water, air, vapor, food, medicine, oils. acids, alkalis, salt ...