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Internal Structure Of High Pressure Plate Gate Valve

Aug 28, 2017

               The plate gate valve has the characteristics of reliable sealing, small switch torque and easy operation under the condition of high pressure or ultra-high pressure, so it is widely used in various high-pressure gas recovery conditions. When the well pressure of this working condition is lower than that of MPA, the sealing reliability of the plate gate valve will be greatly reduced.Gate Valve

               Ultra-high-pressure wellhead mining gas plate gate valve: Through the analysis of several main sealing structures of the plate gate valve, it is considered that the main factors affecting the sealing reliability of the plate gate valve are the size chain and the position tolerance of the sealing pair, the machining precision between the sealing pair and the O-Ring of the seat end, the compression of non-metallic seals or the preload of the Therefore, this paper puts forward the effective measures to realize the reliability of the air seal of the Flat gate valve: The position tolerance between the sealing pair must be within the specified range, and to ensure the machining precision and the precision of the grinding, and to calculate reasonably the O-ring of the seat end, the compression of the Non-metallic seal or The test of hydraulic seal and pressure seal of 2 kinds of flat gate valves with diameters and structures shows that the flat gate valve can be reliably sealed in both high pressure and low pressure.Gate Valve

               Ultra-high-pressure wellhead mining gas plate gate valve: Plate gate valve in high-pressure or ultra-high pressure well, with reliable sealing, small switching torque and easy to operate, so it is widely used in various high-pressure gas recovery conditions. When the well pressure of this working condition is lower than that of MPA, the sealing reliability of the plate gate valve will be greatly reduced. According to API 6A standard, the plate valve of gas wellhead must be 1.8~2.2 MPa low pressure gas seal test, which requires a flat gate valve seal is very high.Gate Valve