Structural characteristics and installation and maintenance precautions of stainless steel three-way ball valve

by:Lianke Valve     2022-09-14
The closing part of the stainless steel three-way valves.com/ball-valve.html' target='_blank'>ball valve is a sphere, and the sphere rotates around the center line of the valve body to open and close a valve. Structural features of stainless steel three-way ball valve: 1. Friction-free opening and closing: completely solves the problem of traditional valves affecting sealing due to friction between sealing surfaces; 2. Top-loading structure: the valve installed on the pipeline can be directly checked online And maintenance, can effectively reduce the downtime of the device and reduce the cost. This type of valve should generally be installed horizontally in the pipeline; 3. Single valve seat design. Eliminates the problem that the medium in the middle cavity of the valve affects the safety of use due to abnormal pressure increase; 4. Low torque design. The valve stem with special structure design can easily open and close the valve with only a small handle; 5. Wedge-shaped sealing structure. The valve relies on the mechanical force provided by the valve stem to press the ball wedge to the valve seat to seal, so that the sealing performance of the valve is not affected by the change of pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions; 6. Self-cleaning structure of the sealing surface. When the ball is tilted away from the valve seat, the fluid in the pipeline passes evenly along the sealing surface of the ball at 360°, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning . The stainless steel three-way ball valve has the following advantages: 1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length; 2. The structure is simple, the volume is small, and the weight is light; 3. The sealing surface material of the ball valve is widely used plastic, It has good sealing performance and has been widely used in vacuum systems; 4. Easy to operate, fast opening and closing, only need to rotate 90° from fully open to fully closed, which is convenient for long-distance control; 5. Easy maintenance, simple structure of ball valve, sealing ring It is generally movable, and it is more convenient to disassemble and replace; 6. When fully open or fully closed, the sealing surface of the ball and valve seat is isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface; 7. Scope of application Wide, diameter from small to several millimeters, large to several meters, from high vacuum to high pressure can be applied. The following matters should be paid attention to in the installation and maintenance of stainless steel three-way ball valve: 1. Leave a position for the valve handle to rotate; 2. It cannot be used as a throttling; 3. The ball valve with a transmission mechanism should be installed upright. The working principle of the stainless steel three-way ball valve is to make the valve unblocked or blocked by rotating the valve. The ball valve switch is light, small in size, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, the sealing surface and the spherical surface are often closed, and are not easily eroded by the medium, and are widely used in various industries. 1. Opening process: A. In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem; B. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom makes the The ball disengages the valve seat; C. The valve stem continues to lift and interacts with the guide pin in the spiral groove of the valve stem, so that the ball starts to rotate without friction; D. Until it reaches the fully open position, the valve stem is lifted to the limit position, and the ball Rotate to the fully open position. 2. Closing process: A. When closing, rotate the handwheel clockwise, the valve stem starts to descend and the ball leaves the valve seat and starts to rotate; B. Continue to rotate the handwheel, the valve stem is affected by the guide pin embedded in the upper spiral groove. It can make the valve stem and the ball rotate 90° at the same time; C. When it is about to close, the ball has rotated 90° without contact with the valve seat; D. The last few turns of the handwheel, the angular plane at the bottom of the valve stem Mechanically wedge the ball to press the ball tightly against the valve seat to achieve a complete seal
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