The traditional throttle is low (<16BAR>) midline gummed flap, which is characterized by disc-axis in the flow channel and sealed with the center of the valve body lined with rubber. This butterfly is a membership to help force the butterfly plate and press the rubber phase in order to achieve the necessary sealing pressure than the fluid interface. Generally known that this seal sealing force. Very obvious are the drawbacks:

　　1.Sealing pressure is not easy to control.

　　2.wear and short life is, the domestic life 2000 times the standard requirements.

　　3.shall apply only slight pressure

　　4.uses of water, gas, oil medium

　　5.torque settings.

　　High performance butterfly valve is 70 years abroad, developed new varieties of a butterfly from the aerospace industry. Its technical characteristics are:

　　1.slice rotation center axis of the pipe cross-section and sealed with a deviation in the switching process is not in contact with the sealing seat, no wear, just minutes before closing in contact with the sealing seat.

　　2.is a flexible sealing seals seat structure, the application of the principles of media to create a reliable seal sealing effect, completely changed the traditional throttle valve gasket to achieve in principle compulsory.

　　Three well-known that high-performance butterfly valve, which is characterized by: a long service life and environmental testing laboratory life of up to 100 million times, life in geometric multiples higher than the center line butterfly valve, torque lighter than the midline flap 30 % can be reduced, broad application of pressure, operating pressure up to 100BAR, for a variety of media.

　　The development of this valve, valve in the pressure level within a larger replacement valve gate valve is its weight is only 1 / 3 the price on the same gate 2 / 3, in an industrial area with a wide range of application prospects.