What is the future development direction of high pressure ball valve

The size of the friction of the high-pressure ball valve is not only related to the working pressure of the medium, but also to the shape of the ball, seal and structure of the support member, as well as the friction of the sealing seat.The force is also related to the rotation angle of the ball valve.

Torque working under atmospheric pressure difference: When the high-pressure ball valve rotates at 30°, the maximum rotation (90°), the actual ball valve is opened at 80°, and the differential pressure is less than the usual.The pressure difference after closing the ball valve is maximized.As its opening increases, the pressure is fixed and the maximum torque is rotated to 40°.The operation of the high pressure ball valve is divided into two main stages.The ball valve begins to open, and the friction is only caused by the bias force of the sealing member and the static pressure of the working medium on the ball.The high-pressure ball valve has a simple structure and is well sealed, but all the load of the sphere is transmitted to the outlet seal, so that the sealing material can withstand the working load of the spherical medium. This structure is widely used in medium and low-pressure ball valves.

High-pressure ball valve seals are metal seals, metal seals, metal seals, stainless steel plate and graphite composite plate seals, which are used for metal seals and hard-sealed butterfly valve drive forms, except for electric, worm gear, air, etc.The high-pressure ball valve is installed in the diameter direction of the tube. In the cylindrical path of the main body of the high-pressure ball valve, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between 0 and 90°, and the valves are all open.The high-pressure ball valve ball is elastic.The high-pressure ball valve and seat seals are made of metal materials.The sealing rate is large, the pressure of the medium itself will not meet the sealing requirements, and an external force must be applied.The valve is suitable for high temperature and high pressure media.The sphere of the high-pressure ball valve is suspended under the pressure of the medium, and the sphere produces a certain displacement and is pressed on the sealing surface of the outlet end to ensure the sealing of the outlet end.

At present, high-pressure ball valves are used as components to realize the discharge and flow control of pipeline systems, and have been widely used in various fields such as petroleum, chemistry, metallurgy, hydraulic power generation, etc.In the well-known high-pressure ball valve technology, the sealing form is a multi-sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc.Due to the limitations of the structural characteristics of the high-pressure ball valve, it is not suitable for high temperature, high pressure and corrosion resistance and wear resistance.The high-pressure ball valve is higher than the traditional ball valve. The operation is light, and the switch does not compensate for the increase in the torque of the transmission mechanism, and the sealing performance and life of the butterfly valve are improved. The ball valve has an elastic groove at the lower end of the inner wall of the sphere to achieve elasticity.When the channel is closed, the spherical drum is sealed with a valve stem, the sphere is released, the sphere is closed before the sphere is restored, and the sphere is restored between the sphere and the valve seat, which can reduce the friction and operating torque of the sealing surface.