Manual butterfly valve pneumatic valve manual powder powder butterfly valve spool is composed of two, in the middle of a valve plate, which has an intermediate ring, the valve plate has a splined shaft, spline shaft has a head for connecting the cylinder ( pneumatic actuators) Scope: concrete mixing stations and dry powder. Manual Powder butterfly Synonyms: Powder butterfly, Connection: flange, material: cast aluminum, nominal diameter: 100-400 (mm), the driving medium: compressed air, pressure range: 0.2Mpa, suitable temperature: the highest 80 ℃, the main material: Semi-body aluminum alloy material, the rotary valve with wear-resistant polymer materials, structure: a vertical plate, transmission forms: pneumatic and sealing form: soft sealing type, pneumatic actuator configuration: CP101, CP126 model. Pneumatic valve cement gravity cast from two semi-valve body, half body aluminum alloy material, the rotary valve plate using polymer materials, has a good seal. The top and bottom of the same round flange having a top flange and a hem member for a flexible sleeve. The main advantage of pneumatic cement Butterfly simple structure, small size, light weight, low cost, pneumatic cement butterfly This feature was particularly notable, install underground passage at high altitude, after two five-way solenoid valve control and convenient operation, but also adjust the flow medium. Fluid resistance is small, when the large-diameter pneumatic butterfly valve is fully open and effective flow of larger, open and close rapidly effort, pull rotating disc 90 to complete the opening and closing angle, since the shaft side dish wrench media force nearly equal, while the opposite direction of torque generated, and thus a smaller opening and closing torque, low pressure can achieve a good seal, butterfly valve seal material NBR, fluorine rubber, food rubber, PTFE lined so good sealing performance, including sealing butterfly as the most important advantages of the hard and soft valves stacked metal sheet with a metal seal and elastomeric seal, both at low temperatures both with excellent sealing performance. Powder butterfly valve pneumatic valve range of applications with long life metal sealed valves generally higher than the elastic seal, but it is difficult to completely seal. Metal seal can adapt to high temperature, flexible seal is affected by the temperature limit of the defect. If you require the use of flow control valve as the main choice is the right size and type of valve. Butterfly structure principle is particularly suitable for production of large diameter valves. Butterfly not only widely used in the oil, gas, chemicals, water treatment and other general industries, but also for the cooling water system of the thermal power station. Industry-specific characteristics of butterfly valves to high temperature, higher pressure range, the valve nominal diameter large, carbon steel valve body, the valve plate seal with a metal ring in place of the rubber ring. Large temperature valve with welded steel manufacturing, mainly for smoke duct and gas pipelines high temperature media. Advantages of powder pneumatic butterfly valve 1, open and close easily and quickly, saving, fluid resistance, can often operate. 2, simple structure, small size and light weight. 3, can carry mud accumulation of fluid in the pipe mouth least. 4, low pressure, a good seal can be achieved. 5, regulated performance.