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Briefly introduce the characteristics and types of pneumatic butterfly valves

by:Sino Valves     2021-11-28
Pneumatic butterfly valve refers to the closing part (valve clack or valve clack), which rotates around the valve shaft to open and close a valve, and mainly plays the role of cutting off and throttling in the pipeline. The opening and closing part of the pneumatic butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis around the valve body to achieve the purpose of opening and closing or adjustment. The opening and closing degree of butterfly valve is generally less than 90°.   Pneumatic butterfly valve and butterfly stem have no self-locking ability. In order to locate the butterfly plate, a worm gear reducer is added to the valve stem. The use of a worm gear reducer can not only make the butterfly plate have self-locking ability, so that the butterfly plate can stop at any position, but also can improve the operating performance of the valve. Industrial butterfly valves are characterized by high temperature resistance, high applicable pressure range, large nominal valve diameter, carbon steel valve body, and metal ring instead of rubber ring for valve plate sealing ring. The large high temperature butterfly valve is made of steel plate welding, and is mainly used for high temperature smoke pipes and gas pipes.   Pneumatic flange butterfly valve, pneumatic flange butterfly valve This product is composed of rubber sealing butterfly valve and carbon steel or stainless steel valve plate and stem. It is suitable for regulating flow and intercepting media in water supply and drainage, gas pipelines such as food, chemical, petroleum, electric power, light textile, papermaking, etc., with a temperature of ≤80~120℃. Pneumatic regulating butterfly valve is a kind of valve (valve plate) that rotates around a fixed axis perpendicular to the passage. It consists of a piston type double-acting or single-acting (spring return type) pneumatic actuator and a butterfly valve. It is a rotary high-performance adjustment Or cut-off valves, equipped with electricity, gas valve positioner or solenoid valve, air filter pressure reducer, limit switch (valve position echoer), which can realize the proportional adjustment and two-position cut-off of the fluid medium in the process pipeline Control, so as to achieve the automatic control of the flow, pressure, temperature, liquid level and other parameters of the fluid medium. Pneumatic flange butterfly valve, pneumatic flange butterfly valve This product is composed of rubber sealing butterfly valve and carbon steel or stainless steel valve plate and valve stem. It is suitable for regulating flow and intercepting media in water supply and drainage, gas pipelines such as food, chemical, petroleum, electric power, light textile, papermaking, etc., with a temperature of ≤80~120℃. Pneumatic regulating butterfly valve is a valve (valve plate) that rotates around a fixed axis perpendicular to the passage. It is composed of a piston type double-acting or single-acting pneumatic butterfly valve. It is composed of a (spring return type) pneumatic actuator and a butterfly valve. High-performance regulating or shut-off valve, equipped with electricity, air valve positioner or solenoid valve, air filter pressure reducer, limit switch (valve position echoer), which can realize the proportional adjustment of the fluid medium in the process pipeline And two-position cut-off control, so as to achieve automatic control of the flow, pressure, temperature, liquid level and other parameters of the fluid medium. The pneumatic wafer butterfly valve has a novel structure. The valve body is constructed to meet the short-distance wafer structure formed by the narrow pipeline space. The external leakage is zero and the internal leakage meets the national standards. Pneumatic rubber-lined butterfly valve, the connection method is flange, wafer, and the seal is lined with nitrile rubber, ethylene propylene rubber, heat-resistant ethylene propylene rubber, natural rubber, neoprene, fluorine rubber, polytetrafluoroethylene, according to the chemical Nature has a more reasonable choice. Pneumatic fluorine-lined butterfly valve, anti-corrosion fluorine-lined butterfly valve adopts a two-piece valve body combination, the valve seat and the valve body lining are integrated, when the valve is working, only the all-plastic valve seat and the plastic-lined butterfly plate are in contact with the medium, and the product can withstand Corrosion of any medium except for molten alkali metal and elemental fluorine, in which D71F46 valve stem and butterfly plate (forging) are integrated, and the surface is evenly coated 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 flow capacity is strong, and the torque is moderate. It adopts a four-stage sealing structure and is equipped with a temperature-resistant and anti-aging SI rubber elastic gasket valve seat outside the sealing surface, which fully reaches Zero leakage of the medium. Pneumatic ventilating butterfly valve has a feature. There is a small gap between the valve plate and valve seat. This product is suitable for use in an environment with poor air circulation. The main features of the pneumatic telescopic butterfly valve are as follows: novel design, reasonable design, unique structure, light weight, convenient operation, and rapid opening and closing; in addition to regulating and intercepting the flow, the telescopic butterfly valve can compensate for the thermal expansion and contraction caused by the temperature difference of the pipeline, but also It can provide convenience for installation, replacement and maintenance of valves. The sealing part can be adjusted and replaced, and the sealing performance is reliable. The main features of the pneumatic telescopic butterfly valve are as follows: novel design, reasonable design, unique structure, light weight, convenient operation, and rapid opening and closing; in addition to regulating and intercepting the flow, the telescopic butterfly valve can compensate for the thermal expansion and contraction caused by the temperature difference of the pipeline, but also It can provide convenience for installation, replacement and maintenance of valves. The sealing part can be adjusted and replaced, and the sealing performance is reliable. This article was edited and published by Valve (Technical Department)
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