北京华泰辉阀门有限公司

Imported manual ball valve
Overview of imported manual ball valve
Manual ball valve is a kind of valve that came out in the 1990s. In half a century, ball valve has developed into a major valve type. The ball valve is mainly used to cut off or connect the medium, and can also be used to regulate and control the fluid. The three-way ball valve can perform more precise flow regulation and control, while the three-way ball valve is used to distribute the medium and change the flow direction of the medium. Manual ball valves are mainly named based on the way the ball valve is driven by turning a handwheel or handle. The imported manual ball valve relies on a rotating valve to open or block the valve. Ball valves are light on and off, small in size, can be made into large diameters, have reliable sealing, simple structure, and easy maintenance. The sealing surface and spherical surface are always in a closed state and are not easily eroded by the medium. They are widely used in various industries.
Chinese name manual ball valve
English name B
Advantages of imported manual ball valve
Manual ball valve is a relatively new type of ball valve. It has some advantages unique to its own structure. If the switch has no friction, the seal is not easy to wear and the opening and closing torque is small. This allows the size of the actuator to be used reduced. Equipped with a multi-turn electric actuator, the medium can be adjusted and tightly cut off. It is widely used in petrochemical, urban water supply and drainage and other working conditions that require strict cutting.
Manual ball valves are mainly used in pipelines to cut off distribution and change the flow direction of media. It has the following advantages
The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length.
Simple structure, small size and light weight.
Tight and reliable, plastic is currently widely used as the sealing surface material of ball valves with good sealing properties and has also been widely used in vacuum systems.
Easy to operate, quick to open and close, just rotate from fully open to fully closed, convenient for long-distance control.
Easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is easy to disassemble and replace.
When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes, it will not cause erosion of the valve sealing surface.
It has a wide range of applications, with diameters ranging from a few millimeters to several meters, and can be applied from high vacuum to high pressure. When the ball rotates at a certain degree, all spherical surfaces should be present at the inlet and outlet to cut off the flow
Opening process of imported manual ball valve
In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem. .
When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at its bottom causes the ball to disengage from the valve seat.
The valve stem continues to lift and interacts with the guide pin in the spiral groove of the valve stem, causing the ball to begin rotating without friction.
Until it reaches the fully open position, the valve stem is lifted to the extreme position and the ball rotates to the fully open position.
Closing process of imported manual ball valve
When closing, rotate the handwheel clockwise, the valve stem begins to descend and the ball leaves the valve seat and begins to rotate.
Continue to rotate the handwheel, and the valve stem is acted upon by the guide pin embedded in the spiral groove on it, causing the valve stem and the ball to rotate simultaneously.
When it is about to close, the ball has rotated without contact with the valve seat.
During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges against the ball, pressing it tightly against the valve seat to achieve a complete seal.