Pneumatic wedge gate valve sealing principle and use of the occasion

pneumatic wedge gate valve sealing principle is to rely on wedge on the two on the seal face and pneumatic valve sealing surface wedge style together to seal. Is the purpose of using the wedge in order to improve the sealing of secondary load, in order to make the metal sealing pneumatic wedge gate valve can not only for high pressure of medium, low to medium pressure to seal. Close the pneumatic valve stem clockwise, make pneumatic valve sealing surface and pneumatic brake valve sealing surface closed and sealed. But the metal seal pneumatic wedge gate valve produced by wedging effect of inlet side sealing pressure forces are often not enough to achieve by medium inlet side seal. So metal sealing pneumatic wedge gate valve is a single seal.
pneumatic wedge gate valve applicable occasions
in the various types of pneumatic valves, pneumatic valve gate is one of the most widely used. It usually is only applicable to full open or full closed and cannot be used to adjust and throttling.
pneumatic wedge gate valve in the pneumatic valve is commonly used in the shape of the size without strict requirements, and conditions of use and has a tough situation. As the working medium of high temperature and high pressure, the request to close a inferior to ensure the seal for a long time.
usually, conditions of use or require reliable sealing performance, high pressure, high pressure cut-off ( Differential pressure) And low pressure as ( Small pressure difference) , low noise, have spirit cave and vaporization phenomenon, high temperature medium and low temperature ( Cryogenic) , it is recommended to use pneumatic wedge gate valves. Such as the electric power industry, oil refining, petrochemical, offshore oil, tap water and wastewater treatment engineering of urban construction, chemical industry and other fields of application.