Flanged hard sealing butterfly valve design using three eccentric principle, open the seal that is separated, close the contact that is sealed, so the sealing performance and reliable. Flanged hard sealing butterfly valve is suitable for power, heat, high temperature gas, flammable gas, hot air, urban heating, water supply, sewage treatment, chemical, metallurgy, sugar, paper, shipbuilding, aviation, steel and other enterprises. Flanged hard sealing butterfly valve Main components Material: Body: Cast steel, stainless steel, chrome nickel molybdenum Titanium steel Valve plate: stainless steel, chrome nickel molybdenum Titanium steel Valve stem: 2Cr13, stainless steel, chromium nickel molybdenum Titanium Filling: fluorine Plastic, flexible graphite Flanged hard sealing butterfly valve Standard: Flange connection: GB9115.8-88, GB9115.11-88 GB12224 Structure length: GB12221-89 Pressure test: GB / T13927-92 Transmission mode: manual, worm * Transmission, pneumatic, electric flanged hard sealing butterfly valve Performance Specifications: Nominal diameter DN (mm): 50 ~ 1000 Nominal pressure PN (MPa): 1.0 ~ 2.5,150 Lb, 10K