Electric Butterfly Valve is suitable for requiring flow regulation. Because the pressure loss of the Butterfly Valve in the pipeline is relatively large, about three times that of the gate valve, the influence of the Butterfly Valve Electrical, and the firmness of the butterfly plate should be fully considered when closed. In addition, the operating temperature limit of the elastic seat material at high temperature must be considered. The structure length and overall height of butterfly valve are small, the opening and closing speed is fast, and they have good fluid control characteristics. The structure principle of butterfly valve is the most suitable for making large diameter valve. When the butterfly valve is required to control the flow rate, the most important thing is to correctly choose the size and type of the butterfly valve, so that it can work properly and effectively midline butterfly valve usually, in throttle, regulation control and mud medium, requires short structure length, quick opening and closing speed (1 / 4 r). Low pressure cut (small pressure difference), recommended butterfly valve. In the double-position regulation, shrink-mouth ground channel, low noise, air hole and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive medium, the butterfly valve can be selected.When the butterfly valve is used under special working conditions, or requires strict sealing, or serious wear or low temperature (deep cold) and other working conditions, the special design metal sealing belt adjustment device for the three eccentric or double eccentric special butterfly valve should be used.
Working principle: the working power supply is usually: AC220V, AC380V, etc. Input signal: 4~20mA 0~10v. After commissioning by the regulating Electric Actuator and the Control Valves stem, drive the hard seal butterfly valve valve plate for 0~90 parts. It is a kind of Electric Control Valve. Receive the 4~20mA signal from the industrial automation control system to accurately control the valve opening degree, so as to achieve the adjustment and control of different process parameters such as flow rate, temperature and pressure.
Product features: (1) Adopt dual eccentric structure, with the tighter the function of the sealing, reliable sealing performance. (2) Seal auxiliary material to choose stainless steel and nitrile oil-resistant rubber pair, long service life.(3) Rubber sealing ring can be located on the Electric Valve body, or can be located on the butterfly plate, can be applied to different characteristics of the medium, for users to choose. (4) The butterfly plate adopts the frame structure, with high strength, large overcurrent area and small flow resistance. (5) The overall baking paint, which can effectively prevent corrosion, and as long as the replacement of the sealing valve seat sealing material, it can be used in different media.
(6) The valve has a two-way sealing function, which is not controlled by the medium flow direction, and is not affected by the space position. Can be installed in any direction. (7) With a small volume, light weight, reliable performance, simple supporting, large circulation capacity, especially suitable for the medium is a relatively clean liquid and gas.
Application field: widely used in food, environmental protection, light industry, petroleum, chemical industry, water treatment, municipal engineering, paper making, electric power, water treatment and other industries of the industrial process automatic control system. Electric butterfly valves are suitable for HVAC and refrigeration industry, and can also be used for industrial field, general service field and water treatment.