Imported lever knife gate valve is a knife type gate valve that works by the lever principle. Its opening and closing parts are rams, the direction of movement of the ram is perpendicular to the direction of fluid, and the medium is cut off by a knife-edged ram that can cut fibrous materials. The valve is mainly used in fiber and solid particle media and sewage treatment systems, and can be equipped with manual, pneumatic and electric actuators, and is widely used in coal preparation, slag discharge, cement, papermaking, mining, chemical industry, sewage treatment and other process automation systems in mines and power plants.
Imported lever knife gate valve has the following characteristics:
The lever type high-temperature knife gate valve can adapt to work in harsh environments such as high temperature and low temperature, especially at a high temperature of about 1000 degrees, without any cooling device, and without deformation.
The sealing performance is good, and the valve plate and body are made of high-alloy materials.
The lever type high-temperature knife gate valve adopts the high-temperature resistant material 2520 on the market, which achieves the protection effect by lengthening the valve stem and increasing the heat sink, which effectively solves the disadvantages of working under high temperature conditions that other knife gate valves do not have.
The lever type high-temperature knife gate valve has the characteristics of short structural length, which can save materials and small pipeline load.
These valves require high temperature resistance and can only be used with hard seals at present.
Imported lever knife gate valve structure:
The sealing structure of imported lever knife gate valve mainly includes the following types:
Single-sided sealing and double-sided sealing: Single-sided sealing refers to sealing only on the sealing surface at the bottom of the blade, while double-sided sealing refers to sealing both the bottom and upper sealing surfaces of the blade.
Metal-to-metal hard seals and metal-to-polyurethane soft seals: Metal-to-metal hard seals are metal seals that are made of metal and have a hard seal formed by metal-to-metal contact. Metal-to-polyurethane soft sealing means that the ram is made of metal and the valve seat is made of polyurethane, and the soft seal is formed with the metal through the elastic deformation of polyurethane.
Metal-to-PTFE soft sealing: This sealing method means that the ram is made of metal and the valve seat is made of PTFE, and a soft seal is formed with the metal through the elastic deformation of PTFE.