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Pneumatic triple eccentric butterfly valve

Posted by Bundor valve
Overview of pneumatic triple eccentric butterfly valve:
Pneumatic triple eccentric butterfly valve consists of pneumatic actuator and triple eccentric butterfly valve, according to different generally can be divided into flange connection or wafer, material: cast iron, cast steel, stainless steel and so on, the body part adopts three eccentric structure, valve plate and seal mechanism design is unique, has excellent cutting performance and durability, has cut off, adjust the dual function at the same time, long life, energy-efficient and butterfly valve.As the closing of pneumatic triple eccentric butterfly valve and gate valve is the same, by torque to complete, that is, the greater the valve closing torque, seat sealing is better, it is called triple eccentric butterfly valve for 90° rotary gate valve.
Triple eccentric butterfly valve,Pneumatic triple eccentric butterfly valve
Application range of pneumatic triple eccentric butterfly valve:
Three eccentric pneumatic butterfly valve is suitable for water, sewage, sea water, air, steam, gas, combustible gas, corrosive medium, oil and food media, the highest operating temperature up to 550℃.Widely used in petroleum, chemical industry, metallurgy, electric power, food, medicine, water supply and drainage, gas transport and other different medium pipeline, as a switch to cut off or adjust the medium flow parameters.
Performance advantages of pneumatic triple eccentric butterfly valve:
1. Adopt the three-dimensional eccentric sealing structure, the wear between the seat and the butterfly plate is small, and the sealing surface is anti-wear, which extends the service life;
2. According to the connection mode, it can be divided into pneumatic sandwich-type triple eccentric butterfly valve and pneumatic flange triple eccentric butterfly valve, which can be used in different process pipelines;
3. Butterfly valve butterfly plate with large diameter can adopt the structure of quilting, which has the characteristics of high strength, large flow area and small flow resistance;
4, the use of bidirectional pressure three eccentric multi-level hard seal structure, with the function of bidirectional seal, installation is not limited by the flow direction of the medium, not affected by the space position, can be installed in any direction;
5, with metal hard seal and elastic seal double advantages, no matter in the low temperature and high temperature, have excellent sealing performance, corrosion resistance, long service life and other characteristics.
Pneumatic triple eccentric butterfly valve structure principle:
Typical triple eccentric pneumatic butterfly valves, in addition to the stem and plate have two eccentric, plate and seat sealing face is inclined round table (this is the so-called triple eccentric third eccentric).When the valve is closed, the valve plate is pushed forward due to eccentricity, and there is no friction between the valve plate and the seat in the closing process. The valve plate is directly pressed on the seat, thus ensuring the service life of the valve;In addition, due to the valve sealing ring (whether mounted on the seat or on the disc) has a certain degree of elasticity, and a small amount of clearance between the boss and the elastic ring in the elastic ring can cause the elastic ring to be slightly displaced;When the valve is closed, the elastomer sealing ring can automatically move to the most uniform position under the closing force;Coupled with a small deformation of the elastic ring, the seat of the sealing ring uniform stress, to achieve the best sealing state.