The sealing principle and application of pneumatic wedge gate valve

the sealing principle and application of pneumatic wedge gate valve
and pneumatic wedge gate valve
the sealing principle of sealing principle of pneumatic wedge gate valve 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.
, the application of pneumatic wedge gate valve
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. If in the working medium of high temperature and high pressure, which requires close thing to ensure long-term lower seal. Usually, the conditions of use or require reliable sealing performance, high pressure, high pressure cut-off ( Differential pressure, low pressure cut-off ( Differential pressure is small, 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.