the working principle of gate valve
wedge Gate Valve seal principle is to rely on the two wedge gate valve sealing surface and sealing surface on the two combine to close when the wedge up to seal. The purpose of using the Wedge secondary seal is to increase the load to the metal sealing wedge gate valve both on the high media pressure, but also for low-medium pressure seal. Off stem clockwise, so that valve sealing surface and the body seal and sealing surface to seal. However, the metal sealing wedge gate valve produced by the wedging effect of sealing the inlet pressure by the media than the force is often insufficient to achieve the import side seal so that the metal sealing wedge gate valve is a single compulsory sealed.
wedge gate valve of the possible applications
in all types of valve, the valve is the most widely used. It generally applies only to fully open or fully closed, adjust and throttle can not be used.
wedge Gate Valve is generally used in the dimensions of the valve is not strictly required, and the use of relatively harsh conditions and the occasion. Such as high temperature and pressure of the working media, demanding the closure of parts to ensure long-term sealing the case and so on.
Typically, the use of conditions or requirements of reliable sealing performance, high-pressure, high pressure cut-off (large pressure), low pressure cut-off (pressure difference), low noise, there is the phenomenon of cavitation and vaporization, heat medium, low temperature ( deep cold), the recommended wedge gate valve. Such as power industry, oil refining, petrochemical, offshore oil, water projects in urban construction and sewage treatment works, chemical industry used more often.
