Introduction to the working principle and operation standard of stainless steel pneumatic flange ball valve

Stainless steel pneumatic flange ball valves are derived from shut-off valves. It has the same 90 degree lift action, except that the plug body is a sphere with a circular through hole or passage through its axis. The ratio of the spherical surface to the passage opening should be such that when the ball is rotated 90 degrees, the spherical surface should be entirely present at the inlet and outlet to intercept the flow. It is the same type of valve as the hydraulic control valve. The difference is that the closing member is a sphere, and the ball rotates around the center line of the valve body to open and close a valve. The ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. It only needs to be rotated 90 degrees and the torque can be closed tightly.
The working principle of the stainless steel pneumatic ball valve is to make the valve unblocked or blocked by the rotary valve. The pneumatic ball valve switch is light in weight, small in size, can be made into a large diameter, reliable in sealing, simple in structure, convenient in maintenance, and the sealing surface and the spherical surface are often closed, and is not easily eroded by the medium, and is widely used in various industries. The operation of stainless steel pneumatic flange ball valve is mainly divided into two operations of opening and closing. The basic standard requirements in the operation process are briefly introduced below:
Opening process
1. In the closed position, the ball is pressed by the [wiki] mechanical [/wiki] of the valve stem and pressed against the seat.
2. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the bottom angular plane causes the ball to disengage from the valve seat.
3. The valve stem continues to lift and interacts with the guide pins in the spiral groove of the valve stem to cause the ball to begin to rotate without friction.
4. Until the fully open position, the stem is raised to the extreme position and the ball is rotated to the fully open position.
Closing process
1. When closing, turn the handwheel clockwise, the valve stem begins to lower and the ball moves away from the seat.
2. Continue to rotate the hand wheel. The valve stem is subjected to the guide pin embedded in the upper spiral groove, so that the valve stem and the ball rotate at 90° at the same time.
3. When it is about to close, the ball has rotated 90° without contact with the seat.
4. In the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges the ball against the ball so that it presses tightly against the seat to achieve a complete seal.