Products DetailsWenzhou Yuzheng Valve Pipe-Fitting Co.,Ltd is one of the leading China wafer butterfly valve manufacturers,Website:http://www.yz-valves.com, welcome to wholesale cheap wafer butterfly valve, butt clamp butterfly valve, lug type butterfly valve, cast iron butterfly valve from our professional factory. Wafer(Lug)Butterfly ValveStandard:Design standard conform to: MSS SP-67, API609, EN593Connection flange conform to: DIN PN10/16/25, ANSI B16.1, BS4504, ISO PN10/16,JIS B2212/2213, BS 10 Table D, BS 10 Table ETop flange conform to: ISO 5211Face to face conform to: API609, ISO5752 series 20, BS5155Test standard conform to: API598Design characters:1. Rubber backed seat with stable valve torque.2. Grooved sleeve design to achieve stable positioning.3. Simple construction, small in size, light in weight. Easy disassembling, installation and maintenance.4. Minimized operating torque. Lever, gear, pneumatic and electric actuators can be chosen.5. Special design, high flow rate and low flow resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament, oils, acids, alkalis, salts etc. No leakage under the rated pressure.Performance:Nominal Diameter: Non-backed:  DN50-DN300Backed:  DN50-DN300DN350-DN1200Nominal Pressure PN (MPa):1.0, 1.6, 2.0, 2.5Testing pressure (water) Ps (MPa)Body seat:  1.5 times rated pressureSeat test:  1.1 times rated pressure