Specific classification of pneumatic butterfly valves
1. Pneumatic flange butterfly valve is composed of sealed butterfly valve, carbon steel or stainless steel valve plate and valve stem. It is applicable to water supply and drainage, gas pipeline flow regulation and interception medium with temperature ≤ 80~120 ℃, such as food, chemical industry, petroleum, electric power, textile, paper making, etc.
2. Pneumatic regulating butterfly valve is a kind of rotary high-performance regulating or shut-off valve composed of piston double acting or single acting (spring return) pneumatic actuator and butterfly valve. It is equipped with electric valve positioner or solenoid valve, air filter pressure reducer, limit switch (valve or solenoid valve, air filter and pressure reducer, limit switch (valve position reclaimer), which can realize proportional regulation and two position cut-off control of fluid medium in process pipeline, Realize the automatic control of the flow, pressure, temperature, liquid level and other parameters of the fluid medium.
3. The pneumatic clip type butterfly valve has a novel structure. The valve body structure is a short distance clip type structure, which meets the requirements of narrow pipe space, zero external leakage and national standards for internal leakage.
4. Pneumatic rubber lined butterfly valve, with flange, clamping and sealing connection, lined with clove rubber, ethylene propylene rubber, heat resistant ethylene propylene rubber, natural rubber, neoprene, fluororubber and polytetrafluoroethylene, can be selected more reasonably according to the chemical properties of the medium.
5. The pneumatic fluorine lined butterfly valve and anti-corrosion fluorine lined butterfly valve are composed of two valve bodies, and the valve seat and valve body lining are integrated. When the valve is working, only when the full plastic valve seat and the plastic lined butterfly plate contact with the medium, can the product withstand any external medium corrosion of "removing molten alkali metal and element fluorine", including D71F46 valve stem and butterfly plate (forging) are integrated, and the surface is evenly covered with a layer of FEP. The inner surface of the valve body channel is smooth, the fluid resistance is small, the CV value is high, the circulation capacity is strong, and the torque is moderate. The four stage sealing structure is adopted outside the sealing surface. The temperature and aging resistant SI rubber elastic gasket valve seat completely achieves zero leakage of the medium.
6. Pneumatic ventilation butterfly valve, with characteristics, is suitable for the environment with poor air circulation.
7. The main features of the pneumatic telescopic butterfly valve are as follows: novel design, reasonable, unique structure, light weight, convenient operation and fast switching; The telescopic butterfly valve can not only adjust and intercept the flow, compensate the thermal expansion and cold contraction functions generated by the temperature difference of the pipeline, but also facilitate the installation, replacement and maintenance of the valve. The sealing element can be adjusted and replaced, and the sealing performance is reliable.
