Bidirectional pressure spherical rotary valve

1、 Application of bidirectional pressure bearing spherical rotary valve
This butterfly valve is suitable for opening and closing or regulating flow of important pipelines in the fields of food, pure pipelines, petrochemical, power, metallurgy, transportation, and large buildings that require bidirectional sealing, frequent opening and closing, and high reliability. The valve can be driven by worm gear manual, pneumatic, or electric methods
2、 The structural characteristics of the bidirectional pressure bearing spherical rotary valve: This butterfly valve adopts a welded alloy steel sealing pair, a bidirectional flow hard impact sealing spherical surface, zero leakage, and long service life. The unique floating valve seat structure ensures the bi-directional sealing of the valve, completely solving the problem of eccentric butterfly valves being only able to seal in one direction.
This butterfly valve has all the advantages of a three eccentric butterfly valve and also has a highly reliable bidirectional seal.
A bidirectional pressure spherical rotary valve, characterized in that the valve seat seal is a spherical seal. The sealing surface between the valve plate and the valve seat is a conical structure, and temperature and corrosion resistant alloy materials are deposited on the conical surface of the valve plate; The structure of assembling the spring fixed between the adjusting ring pressure plate and the adjusting bolt on the pressure plate together. This structure effectively compensates for the tolerance zone between the shaft sleeve and the valve body, as well as the elastic deformation of the valve stem under medium pressure, solving the sealing problem that exists in the bidirectional exchange medium transportation process of the valve. The sealing ring is composed of multiple layers of stainless steel sheets on both sides of a soft T-shape, which has the dual advantages of metal hard sealing and soft sealing. It has zero leakage sealing performance in both low and high temperature conditions.
The experiment proves that when the flow direction of the medium is the same as the rotation direction of the butterfly plate, the pressure on the sealing surface is generated by the torque of the transmission device and the effect of the medium pressure on the valve plate. When the positive medium pressure increases, the tighter the compression between the inclined conical surface of the valve plate and the sealing surface of the valve seat, the better the sealing effect. When in a countercurrent state, the sealing between the valve plate and the valve seat is pressed against the valve seat by the torque of the driving device. As the reverse medium pressure increases, when the unit positive pressure between the valve plate and valve seat is less than the medium pressure, the deformation energy stored by the spring of the regulating ring after being loaded compensates for the tight pressure on the sealing surface of the valve plate and valve seat, playing an automatic compensation role. Therefore, unlike existing technologies, this utility model does not install soft and hard multi-layer sealing rings on the valve plate, but is directly installed on the valve body. Adding an adjustment ring between the pressure plate and the valve seat is an ideal bidirectional hard sealing method. It will replace gate valves, globe valves, and ball valves.