Quality is everything! US Walker (WORK) inlet flange butterfly valve with automatic compensation telescopic pipe thermal expansion and contraction easy loading and unloading functions. Suitable for temperatures below 425 ℃ Nominal in 1.6mpa less petroleum, chemical, power, paper, water supply and drainage and municipal construction and other industrial piping best means for adjusting the flow rate and the carrier body for drying. Uses and Features: 1, seal replacement parts can be adjusted, reliable sealing performance characteristics. 2, novel design, reasonable, unique structure, light weight, easy to operate, opening and closing fast; 3, in addition to expansion valve for regulating and shutoff role to compensate for pipe temperature difference of thermal expansion and contraction functions, but also for the installation of replacement, repair valves provide convenient; Caution: one, the structure by structural constraints do not meet the following diameter DN200 valves, because the overall structure of the valve plate thick, large flow resistance. Second, due to the multi-Flex stacked ring fixed in the valve plate, when the valve plate normally open state media to form a positive sealing surface erosion, and metal sandwich of soft seal by brushing with a direct impact on sealing performance. Third, because the principle of the three eccentric structure, the sealing surface of the seat between the valve plate by the transmission of torque to the valve plate is pressed against the valve seat. Positive flow state, the higher the pressure medium sealed tight squeeze. When countercurrent flow medium with medium pressure increases between the valve plate and seat when positive pressure is less than medium pressure, the seal began to leak. Material: Body material: steel, carbon steel, forged steel, chrome molybdenum steel, stainless steel, ceramic, plastic Connection: Flange, wafer, welded wire port card sleeve clamp socket weld, butt, wafer drive mode: device is suitable for manual, manual, electric, pneumatic, worm, gear and other media: water, oil, gas, steam and manufacturing standards:! American standard API ANSI GB GB HB ,, Japanese standard JIS, German standard DIN work Pressure: 1.6MPA-32MPA (American Standard from 150LB-2500LB). Working temperature: -196 ° C- 550 ° C. Valve size: DN15-DN1000. When ordering, please provide the following information:? A nominal diameter (mm), PN (MPa), and the operating temperature range of two straight before the pressure regulating valve, the valve pressure three media name and status at 4 single seat??? valve supply voltage (220V or 380V, the default 220V) 5 Input signal:??? 4-20mA, or 1-5V (default 4-20mA) 6 single-seat control valve body, the trim material requirements of seven other special requirements (such as corrosion resistance requirements, proof grade requirements, leakage class limits, etc.) United States Walker (WORK) Valve Chinese agents welcome you to inquire and order!