Wedge gate valve sealing principle and application 1, wedge gate valve sealing principle wedge gate valve sealing principle is based on the wedge gate on the two sealing surface and valve body sealing surface wedges when the tight combination of time to seal . The purpose of using a wedge gate is to increase the auxiliary seal load so that the metal-sealed wedge gate valve can seal both high and low medium pressures. Turn the valve stem clockwise to close the gate valve sealing surface and the valve sealing surface to seal. However, metal-sealed wedge gate valve wedge effect generated by the inlet end of the seal than the pressure by the media force is often not enough to achieve the inlet seal, so the metal seal wedge gate valve is a one-sided forced seal. 2, the application of wedge gate valve in various types of valves, gate valve is the most widely used one. It generally only applies to fully open or fully closed, can not be used for regulation and throttling. Wedge gate valve is generally used in the shape of the valve is not strictly required, but the conditions of use and more demanding occasions. If the working medium under high temperature and pressure, require the closure to ensure long-term sealed case. In general, the conditions of use or require reliable sealing performance, high pressure, high pressure cutoff (large pressure drop), low pressure cutoff (small pressure drop), low noise, cavitation and vaporization, high temperature medium, low temperature Wedge gate valve. Such as the power industry, petroleum refining, petrochemicals, offshore oil, urban construction in the tap water and sewage treatment works, chemical and other fields more widely used.
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