Fluoride ceramic rotating disc valve

Disc valve, also known as rotary disc valve, the valve adopts a two-way disc seal structure. Under the action of the cylinder torque, the valve shaft realizes the rapid opening and closing of the valve by the switch of the surface of the valve seat rotating in the plane. Designed for materials with wear and erosion properties to work continuously for long periods under harsh conditions.

Common disc seals are mainly metal substrate surfacing or wear-resistant cemented carbide, in the case of serious wear and erosion, often can get good early results. However, with the passage of time, frequent switching, wear-resistant carbide is gradually worn, and finally can only be sealed with metal substrate, the wear rate increases sharply, and the valve seal failure has brought great trouble to the majority of users.

In view of this situation, Youfu company fully understood the understanding of new engineering structures on ceramics, and first proposed the use of structural ceramics as a sealing valve pair, whose hardness is much higher than that of cemented carbide and spray plastic materials, so that the service life of the plate valve is greatly extended.

Fluorine ceramic rotary disc valve adopts structural sealing pair (gate and seat are wear-resistant structural ceramics), corrosion resistance, good wear resistance. At the same time, the Structural Parts of the original disc valve are improved, and the unique large cavity design is adopted. The rotary gate seal structure is flexible in opening and closing during rotation, and has the function of polishing and self-cleaning. The valve is bidirectional sealing and is suitable for conveying dry ash, pulverized coal, slurry, granular materials and other media. It is often used in pneumatic conveying system to balance feed, discharge and exhaust, and has the characteristics of no scaling and no jamming. Simple maintenance, long service life.

In the structural design, the sealing surface of the flumi ceramic rotary disc valve disc is in close contact with the seat through the spring. The pressure of the spring always makes the ceramic valve disc tightly adhere to the ceramic seat, but also makes the vertical displacement of the surface space where the ceramic valve disc is sealed, so that the deformation of the valve parts caused by thermal expansion and cold contraction is effectively compensated. Ceramic spool and ceramic seat are in close contact in any case, and granular medium is difficult to remain on the switch sealing surface. During the opening and closing of the ceramic disc, the friction difference between the ceramic seat sealing surface and the ceramic disc in the cutting direction causes the disc to rotate in a hoist cycle. Thus, the ceramic sealing surface has a self-polishing and polishing cleaning effect, and cuts off the solid medium through the valve, in order to protect the sealing surface and extend the service life of the valve.

Each time the valve is opened, there is enough space in the valve chamber to push the disc away from the medium without clogging the valve. In addition, every time the valve is opened to discharge the material, the eddy current of the material will clean the valve chamber due to the eccentric flow path of the valve body. Ceramic disc valve flow path unimpeded, pressure drop. The packing box is spring-loaded, which greatly reduces possible leakage.

At the same time, the ceramic rotary valve disc has fast switching speed (only rotating 90°), good sealing, corrosion resistance, wear resistance, heat resistance, good effect and long life.

At present, fluorinated ceramic disc valve has been widely used in coal chemical industry, silicon chemical industry, metallurgy, petrochemical and many other industries of solid, gas-solid, solid-liquid transportation system. Applicable media are mainly coal slurry, ash slag, solid, gas-solid two-phase, solid-liquid two-phase fluid. Its main indicators have reached or exceeded the level of similar foreign products.