Center line butterfly valve according to the seat material into rubber lining center line butterfly valve and fluorine plastic lining butterfly valve, rubber lining center line butterfly valve mainly for cast iron valve body lining EPDM, NBR, VITON rubber and so on rubber, mainly used for water, serous situation, often used in medium with fresh water, sea water, sewage etc.PTFE lined butterfly valve(Teflon lined butterfly valve) is mainly in WCB body lining PTFE, F46, and other plastics, mainly used in chemical anti-corrosion, often used in corrosive liquids such as nitric acid and sulfuric acid.
Concentric design Non Pin stem Low torque Zero leakage Low torque Self cleaning Blowout-proof stem ISO 5211 top flange
Design Standard: Design: API 609 Face to face: ISO5752-20 / ISO5752-13 End connection: ASME B16.5 / ASME B16.47 /EN1092-2 Test: API598
Technical Specification: Size: 2”~80”(DN50~DN2000) Class: 150Lb(PN10,PN16) Connection: Double flange / U-Type Flange / Wafer / Lug Operation: Manual / Worm Gear / Pneumatic actuator / Electric actuator Temperature: -20°C to +160°C Application: Sewage treatment / Desalination of sea water / Chemical / Corrosion media
Material Option: Body: Cast iron / Ductile iron / WCB Disc: Stainless steel(CF8,CF8M,CF3,CF3M) / Duplex stainless steel(4A,5A,6A) / Hastelloy alloy(N-12MV,CW-12MW,CW-2M) / Inconel alloy(CY-40,CW-6MC) / Monel alloy(M35-1) / Aluminium bronze alloy(C95400,C95500,C95800,AB2C) Stem: SS420 / 17-4PH / F304 / F316 / K500 Seat: EPDM / NBR / Viton