A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in pipes and equipment to flow or stop and control its flow. It is widely used in all walks of life. According to the purpose and structure of the valve, it can be divided into many types, such as ball valves, gate valves, stop valves, butterfly valves, check valves, regulating valves, pressure reducing valves, etc. However, in some special occasions, ordinary valves may not meet the process requirements, and a special valve, the insulation valve, is required.

The main features of thermal insulation valves and ordinary valves

The jacket insulation valve is a conventional valve body with a metal jacket welded on the outside. The temperature of the medium in the valve body can be adjusted by injecting steam, heat transfer oil, cooling water and other media into the jacket to achieve the effect of heat preservation or cold preservation.
The jacket insulation valve is mainly suitable for conveying high-viscosity media that will solidify or crystallize at room temperature, such as asphalt, glue, resin, etc., and is widely used in petroleum, chemical, food and other industries.

01 Appearance and structure
The outer layer of the insulation valve has an insulation interlayer, and there are two connection ends, the inlet and the outlet, in the insulation interlayer. Through these two connection ends, steam or hot oil can be used as the insulation medium to flow through the insulation interlayer, so as to heat the internal process medium or maintain a constant temperature. Ordinary valves do not have such an outer structure, and only have a flange to connect the pipeline.

02 Functional performance
The insulation valve can effectively reduce the heat loss of the medium in the pipeline, extend the service life of the medium, and improve production efficiency and product quality. Especially for those high-viscosity media (such as asphalt, resin, glue, etc.) that will solidify or crystallize at room temperature, if ordinary valves are used, it is easy to cause medium condensation to block or damage the seal when switching or adjusting. Using insulation valves can avoid these problems.

03 Application range
Due to its good insulation function, insulation valves are mainly used in various systems such as petroleum, chemical, metallurgy, and pharmaceuticals to transport high-viscosity media that will solidify or crystallize at room temperature. For example, in asphalt transportation systems, it is necessary to use insulated ball valves with large diameter, high pressure, high sealing performance and high reliability; in food production systems, it is necessary to use insulated stop valves or discharge valves with good sanitary grade and corrosion resistance to prevent food spoilage or contamination; in fertilizer production systems, it is necessary to use valves with strong high pressure and high temperature resistance to prevent accidents such as gas leakage or explosion.