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The working principle of electric butterfly valve

2018-07-31

With the rapid development of industrial manufacturing, the quality and performance of valves are constantly improving. Among many valves, electric ball valves and electric butterfly valves are the most prominent among many valves. The following is an introduction to the working principle of electric butterfly valves.

The butterfly plate of the electric butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the butterfly valve is a kind of valve that opens, closes or adjusts the medium flow by reciprocating the disc opening and closing parts about 90 °. The electric butterfly valve has simple structure, small size, light weight, low material consumption, small installation size, small driving torque, simple and rapid operation, and it can also have good flow regulation function and closing and sealing characteristics. It has developed in the past ten years. One of the fastest valve varieties. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. The synthetic rubber seal has corrosion resistance, erosion resistance, dimensional stability and good resilience. Metal-sealed valves generally have a longer life than elastic-sealed valves, but it is difficult to seal completely. Metal seals can adapt to higher operating temperatures, while elastic seals have temperature-limited defects.

Electric butterfly valve connection mode is different, generally divided into electric wafer type butterfly valve and electric flange type butterfly valve. Sealing materials have soft sealing (normal temperature and pressure) and hard sealing (high temperature and high pressure). The working power supply has AC220V,AC380V,DC24V. The control form is divided into switch type and adjustment type. The switch type plays the role of switch. The adjustment type is used to adjust the flow and can accurately adjust the flow to thousands of degrees.

Working principle

Electric butterfly valve to electrical energy as the driving force, through the electric device to drive the valve stem, is the butterfly valve to produce 90 ° rotary motion to achieve the opening and closing of the valve, can also accept industrial automation control system 4 ~ 20mA or other signals to accurately control the valve opening, so as to achieve the flow, temperature, pressure and other different process parameters of the regulation and control. Butterfly valve is not only widely used in oil, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power station. In order to meet the requirements of high and low temperature, strong erosion, long life and other industrial applications, the metal seal butterfly valve has been greatly developed. With the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance and high strength alloy materials in butterfly valves, metal sealed butterfly valves have been widely used in industrial fields such as high and low temperature, strong erosion and long life. Butterfly valves with large diameter (9~750mm), high pressure (42.0MPa) and wide temperature range (-196~606 ℃) have emerged, thus making butterfly valve technology reach a new level.

henan on the valve of a joint stock limited company production of gas butterfly valve is divided into electric butterfly valve, manual metal hard seal butterfly valve, pneumatic hard seal butterfly valve and other products. More users in the installation of multi-level butterfly valve should pay attention to what matters, can contact the 13703820603 in the manager