Working principle and advantages of stainless steel pneumatic three way ball valve

         Three stainless steel ball valve with its small fluid resistance, simple structure, small volume, light weight, wide application range and other advantages by consumers. Stainless steel three way ball valve and flanged gate valve belong to the same type of valve. The difference is that the closing piece is a sphere, and the ball rotates around the center line of the valve body to open and close a valve. Ball valve in the pipeline is mainly used to do cutting, distribution and change the direction of flow medium. Pneumatic three pass ball valve only need to use pneumatic actuator, with air source  rotation, 90 degrees of operation and a small rotation torque can be closed tight. Full equality of the valve cavity for the media to provide a small resistance, through the flow channel. It is generally considered that the ball valve is the most suitable for direct use. The main features of the valve itself is compact, easy operation and maintenance for water, solvents, acids, and natural gas general working media, but also applies to poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Today, Xiao Bian will take you to understand the valve industry in the stainless steel three pass valve some of the performance characteristics and principles of operation.

One, the working principle of stainless steel three way ball valve:

1, opening process:
A, in the closed position, the ball is pressed by the mechanical action of the valve stem and tightly pressed on the valve seat;
B, when the handwheel is turned counterclockwise, the valve stem is reversed and the bottom angular plane causes the ball to disengage from the valve seat;
C, the stem continues to ascend and interacts with the guide pin in the stem spiral so that the ball begins to rotate without friction;
D, until the fully open position, the stem is lifted to the limit position, and the ball rotates to the fully open position.

2, closing process:
A, turn the handwheel clockwise when the valve closes. The stem begins to fall and the ball begins to rotate away from the seat;
B, continue to rotate the handwheel, the stem is inserted in its spiral groove in the guide pin role, so that the stem and sphere at the same time rotating 90 degrees;
C, when it is about to close, the ball has rotated 90 degrees without contact with the valve seat;
D, in the last few turns of the handwheel, the angular plane at the bottom of the valve is mechanically wedged against the compression sphere, pressing it tightly against the valve seat and reaching full seal.

Two, stainless steel three pass ball valve structure features:
1, mounted structure: the valve installed on the pipeline can be directly checked and maintained online, can effectively reduce device parking, reduce costs. This kind of valve should be installed horizontally in the pipeline;
2, opening and closing no friction: completely solved the traditional valve because of the friction between the sealing surface and affect the sealing problem;
3, low torque design: special structural design of the valve stem, with only a small hand, the valve can easily open and close;
4 wedge-shaped seal structure: the valve stem is provided by the mechanical force, the ball seat on the wedge pressure to seal the valve seal from the impact of changes in pipeline pressure under various working conditions to ensure reliable sealing performance are;
5, single valve seat design: to eliminate the valve cavity medium due to abnormal voltage rise and affect the safety of the use of the problem;
6. The self-cleaning structure of the sealing surface: when the ball is tilted out of the valve seat, the fluid in the pipeline is uniformly communicated with the sealing surface of the sphere by 360°.