what are ball valve obstruction

- Apr 02, 2019-

what are ball valve obstruction

Manufacturing Method of Ball Valve for Reducing Blockage

The invention discloses a ball valve for reducing blockage, which comprises a valve body and a valve stem arranged above the valve body. The valve body is provided with a seat and a ball body. The valve seat is provided with a ball body, a valve seat runner, a valve seat runner and a fluid runner connected at both ends of the valve seat are matched, a ball runner matched with the valve seat runner is arranged in the ball body, and the ball body runner and the valve seat runner are matched. All of them are square holes with rounded corners. The invention provides a ball valve whose cross-sectional area of the spherical runner and the valve seat runner are square holes with rounded corners. The setting of rounded corners can slow down the erosion of fluid to the ball seat, while the square holes can provide a larger flow area, reduce the flow rate of fluid, greatly reduce the scour of the ball mouth, reduce the wear of the ball valve, and prolong the service life of the ball valve.

The invention relates to a ball valve, in particular to a ball valve for reducing blockage.

[Background technology]

The ball valve is a valve driven by a stem and rotated around the axis of the stem. Square valves can also be used for fluid regulation and control. Hard-sealed V-shaped ball valves have strong shear force between the V-shaped ball core and the metal seat of hardfacing carbide, especially for medium containing fibers and micro-solid particles. In the pipeline, the multi-pass ball valve can not only flexibly control the confluence, diversion and flow switching of the medium, but also close any channel and connect the other two channels.

In China, ball valves are widely used in petroleum refining, long-distance pipeline, chemical industry, paper making, pharmaceutical, water conservancy, power, municipal, iron and steel industries, and play an important role in the national economy. It has the action of rotating 90 degrees, the cock body is a sphere, with a circular through-hole or passage through its axis. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. They can be closed tightly with only 90 degrees of rotation and a small moment of rotation. Ball valves are most suitable for use as switch and cut-off valves, V-type ball valves.

The existing seats and spherical holes are standard circular, and the fluids have a great impact on the service life of the valve under the condition of small opening of the valve. And the previous ball valves are welded, which can not guarantee the sealing performance of the valve body, especially the gas medium.