The ball valve is evolved from the stopcock

It has the same rotation of 90 degrees to mention the type of the cock body is a sphere, a circular through-hole or channel through its axis. Sphere and the ratio should be such that when the ball is rotated 90 degrees, in the import and export of office should be fully rendered sphere, thereby cutting off the flow.solenoid valve actuator
Just use the rotary ball valve operation of 90 degrees and a small torque can be closed tightly. Full equality body cavity of the media to provide little resistance, through the flow channel. Usually considered the most suitable valve opening and closing done directly use, but recent development has been the ball valve designed to give it a throttle valve and flow control purposes. The main features of valve itself is compact, easy operation and maintenance for water, solvents, acids and gas work in general media, but also for the poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve may be integral, can also be combined.3 way air valve