国产精品午夜福利在线永久播放_国内精品自产拍在线观看91亚洲_国产粉嫩三级片粉嫩_欧美精品亚洲国产不卡一区_日本一区国产在线播放_三级精品无码不卡_免费A∨网站在线观看_日韩一二新区无码_国产女人喷潮视频免费播放器_高清欧美日韩亚洲国产精品另类91

The two-piece Japanese standard flanged ball valve is a kind of one-piece ball valve. Its opening and closing part is a sphere, and the function of opening and closing the valve is achieved by the rotation of the sphere around the center line of the valve body.

     The working principle of the opening and closing of the two-piece Japanese standard flanged ball valve:

     First, the opening principle

     1. In the closed position, the ball is pressed against the valve seat by mechanical pressure.

     2. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the bottom of the angle plate is separated from the valve seat.

     3. The valve stem is continuously raised and interacts with the guide pin of the valve stem spiral groove, so that the ball starts to rotate without friction.

     4. Until the fully open position, the valve stem should be limited, and the ball rotates to the fully open position.