Butterfly valve specifications cover core parameters including body materials, pressure ratings, and connection types. Standard industrial units feature pressure ratings of PN16 or Class 150, body construction of cast iron or ductile iron, and wafer or lug end connections. Materials of Construction • Body: Cast Iron (IS 210 Gr. FG 200) for smaller sizes, Ductile Iron (ASTM A536) for larger builds. • Disc: Ductile Iron, CF8 (Stainless Steel 304), or CF8M (Stainless Steel 316). • Seat / Liner: EPDM, Nitrile (NBR), or Neoprene for tight sealing. • Shaft / Stem: AISI 410 or AISI 304 stainless steel. Operational & Design Ratings • Pressure Rating: PN 10, PN 16, or PN 25 (testing body pressure up to 24 kg/cm² and seat pressure to 16 kg/cm²). • Temperature Range: Typically -30°C to 130°C depending on seat elastomer selection. • Operation Type: Lever operated for sizes up to 150mm–200mm; manual gear box or pneumatic/electric actuation for larger scales. • Manufacturing Standards: Conforms to BS 5155, IS 13095, or API 609, with actuator mounting flanges matching ISO 5211. If you need specific details, please share:The pipeline size and fluid type (water, gas, chemical)The required pressure rating (PN16, PN25, etc.)Whether you need a manual lever, gear box, or automated actuator AI responses may include mistakes.