Pneumatic valve under different conditions

Pneumatic valve under different conditions. , pneumatic valve sealing structure under the condition of high temperature and high pressure difference periodic change: valve seat sealing surface structure can be used for high-temperature, cyclical changes from the structure. The structure is used for parts seal line caused inflation is not round and the seat of the wear and tear, have automatic to neutralize compensation effect. In under the condition of high temperature and high pressure difference and temperature cycle changes can have a good sealing effect, its sealing is relying on the elastic deformation of flexible seat sealing parts. Sealing pressure ratio calculated in the case of the high temperature materials, consideration should be given to the limit, the strength of the sealing material had fallen to the yield limit under the condition of high temperature, to choose reasonable values. , high temperature condition, material hardness changes: under the condition of high temperature, the hardness of materials have different degrees of decline, hardness drop increases the chance of material plastic deformation and scratches. Surface hardening materials chromium carbide tungsten, chromium boron alloy and some hot hardness is stainless steel. , the material of the plastic deformation, plastic deformation is a metal surface by other material abrasion, binding together or on the surface of roll forming. It and temperature, the material, surface finish, hardness, load, will be affected by fluid, high temperature can make the metal softening, increase the plastic deformation trend. Plastic deformation may cause: stuck valve; Damage sealing surface; Increase the friction, cause the valve core location is not allowed. In the pipeline fluid such as clip has a larger hard particles, can make the trims rough grinding, produce plastic deformation.