Flange type fixed ball valves are mostly used in chemical, petroleum, natural gas, metallurgy, and other industries and long-distance natural gas pipelines containing hydrogen sulfide medium, impurities and corrosion. Flange type fixed ball valves are suitable for a wide range of applications, from small to a few millimeters, up to several meters, from high vacuum to high pressure. When the ball is rotated 90 degrees, all the spheres should appear at the entrance and exit, thus cutting off the flow.
Structural features of flanged fixed ball valve:
1. No friction between opening and closing: completely solves the problem that the valve affects the sealing due to mutual friction between the sealing surfaces;
2. Top-loading structure: The valve installed on the pipeline can be directly inspected and repaired online, which can effectively reduce the parking of the device and reduce the cost;
3, single valve seat design: eliminates the problem that the medium cavity medium of the valve affects the safety of use due to abnormal boosting;
4. Low-torque design: The valve stem with special structure design can be easily opened and closed with only one small handwheel valve;
5, wedge seal structure: the valve is the mechanical force provided by the valve stem, the ball wedge is pressed onto the valve seat and sealed, so that the sealing of the valve is not affected by the change of the pressure difference of the pipeline, the sealing performance under various working conditions Have a reliable guarantee;
6. Self-cleaning structure of the sealing surface: When the ball is tilted away from the valve seat, the fluid in the pipeline passes through the spherical sealing surface and passes through 360° uniformly, which not only eliminates the high-speed fluid to partially wash the valve seat, but also washes away the sealing surface. The accumulation of material reaches the purpose of self-cleaning.
Before the ball valve is fixed, the valve seat can be sealed, that is, the so-called two-way sealing characteristic. With the self-contained discharge valve, the cavity of the valve body can be discharged to the outside. The pivot adopts a blow-proof protection structure, a bearing with a low friction coefficient, and the like.
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