English
中文简体The brass ball valve is a valve that is driven by the valve stem and rotates around the axis of the valve stem. The multi-port ball valve can not only flexibly control the confluence, diversion and switching of the flow direction of the medium on the pipeline, but also can close any channel. The other two channels are connected.
1. In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem.
2. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom makes the ball disengage from the valve seat.
3. The valve stem continues to lift and interacts with the guide pin in the helical groove of the valve stem, so that the ball starts to rotate without friction.
4. Until it reaches the fully open position, the valve stem is lifted to the limit position, and the ball rotates to the fully open position.
Ball valve is a widely used product now, with small fluid resistance, full-bore ball valve basically has no flow resistance, simple structure, small volume, light weight, tight and reliable. At present, various plastics are widely used for the sealing surface materials of ball valves, which have good sealing performance and can achieve complete sealing. Easy to operate, quick to open and close, convenient for long-distance control and easy maintenance.
