Disc valve, also known as rotary disc valve, the valve uses two-way valve disc seal structure. Valve shaft in the role of cylinder torque, driven by the valve seat surface in the plane to do the plane rotary motion switch to achieve a kind of fast opening and closing valve. Designed specifically for materials with wear and erosion properties, it can work continuously for long periods of time under harsh conditions.
Common disk valve seal deputy is mainly metal substrate surfacing or wear-resistant carbide, wear and tear erosion in severe cases, often can get good early results. However, with the passage of time, frequent switching, wear-resistant cemented carbide is gradually worn, the last can only be sealed by a metal substrate, a sharp increase in wear rate, valve seal failure, to the vast number of users has brought great Troubled.
There Fluorine companies in response to this situation, with a full understanding of the new engineering structure of ceramic understanding, the first proposed the use of structural ceramics as a seal valve vice, the hardness is much higher than the carbide and spray material, the plate Valve life is greatly extended.
There Fluorine-ceramic rotary disc valve used for structural sealing of vice (gate and valve seat are wear-resistant structural ceramics), erosion-resistant, good wear resistance. At the same time for the original disc valve structure to improve, the unique design of the large cavity, rotary gate seal structure, opening and closing of the gate during rotation, opening and closing flexible, and polishing self-cleaning function, the valve is closed Two-way seal, suitable for dry ash, pulverized coal, slurry, granular materials and other media delivery, commonly used in pneumatic conveying system for feeding, discharging and exhaust balance, with no fouling, no jam, simple maintenance, Many advantages of long life.
In the structural design, the valve disk sealing surface of the valve disk of the fluorine-dense ceramic rotary disc is in close contact with the valve seat through the spring. The pressure of the spring always causes the ceramic valve disk to closely adhere to the ceramic valve seat and also allows the ceramic valve disk to be sealed The vertical displacement of the surface space, the valve parts caused by thermal expansion and contraction caused by deformation effectively compensated. Ceramic cartridge and ceramic valve seat in any case in close contact with the state, the granular medium in the switch is difficult to remain in the sealing surface. In the ceramic disc valve opening and closing process, the ceramic valve seat sealing surface of the ceramic valve disc in the tangential direction of the friction difference between the valve disc in a hoist cycle of rotation. Thus producing a self-polishing and polishing cleaning effect on the ceramic sealing surface and cutting the solid medium through the valve to achieve the purpose of protecting the sealing surface and prolonging the service life of the valve.
Each time the valve is opened, there is enough space in the valve chamber to push the disk away from the media without jamming the valve. In addition, each time the valve is opened to discharge the material, due to the valve body is eccentric to the flow path to produce vortex, the material swirl will clean the valve cavity. Ceramic disc valve flow path unimpeded flow, pressure drop. Stuffing box with spring loaded mechanism, greatly reducing the possible leakage.
At the same time the ceramic rotary disc valve switch quickly (only rotating 90 °), good sealing, erosion resistance, abrasion resistance, good heat resistance, good effect, long life.
At present, Fluoride ceramic rotary disc valve has been widely used in solid, gas-solid and solid-liquid conveying systems in many industries such as coal chemical industry, silicon chemical industry, metallurgy and petrochemical industry. The applicable media mainly include coal slurry, ash residue, Solid, gas-solid two-phase, solid-liquid two-phase fluid. Its main indicators have reached or exceeded the level of similar foreign products.
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