Four-way valve principle:

Ball valve is made up of cock, evolved from its opening and closing as a sphere, using a sphere around the axis of the stem to rotate for 90 o the realization of the aim of opening and closing. Ball valve is not only simple structure, good sealing performance, and within a certain range of nominal pass after small volume, light weight, less material consumption, small installation size, and drive torque is small, easy to operate, easy to realize rapid opening and closing. Ball valve in the line is mainly used for cutting, distribution, and change the flow direction of medium. "L" type spool valves only operate wrench or actuator with ball rotate 90 degrees, at the same time to switch, two kinds of medium flow easily and quickly, to achieve the effect of one valve is multi-purpose.

Scope of application: nominal pressure or pressure, PN1.0-32.0 MPa, ANSI CLASS 150-900, JIS10-20 k. Nominal diameter or size: DN6 ~ 900, NPS 1/4 ~ 36. Connection: flange, butt welding, thread, socket welding, etc. Applicable temperature: 196 ℃ ~ 540 ℃. Drive mode: manual, worm gear and worm drive, pneumatic, electric, hydraulic, pneumatic hydraulic linkage, electro-hydraulic linkage. The valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304 l), CF8M (316), CF3M, Ti (316 l). Choose different material, can be respectively suitable for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, and other media.

Structure features:

1, fluid resistance small, ball valve is the smallest of all valve fluid resistance in the class a, even reducing ball valve, the fluid resistance is small.

2, switch is quick, convenient, as long as the valve rod rotation 90 °, to complete the ball valve fully open or close the action, it is easy to realize rapid opening and closing.

3, sealed performance is good. Ball valve seat sealing generally use the elastic materials such as teflon, easy to guarantee the seal, and valve sealing force with medium pressure increases.

 4, the valve stem seal and reliable. When the ball valve open/close the valve stem make rotation movement only, so the valve stem packing seal is not easy to be destroyed, and the valve stem pour sealing sealing force with medium pressure increases.

5, do 90 ° rotation of ball valve opening and closing, so easy to achieve automatic control and remote control, ball valve can be configured pneumatic equipment, electric equipment, hydraulic equipment, gas liquid linkage or electro-hydraulic linkage. 6, ball valve passage level off is smooth, not easy to deposit medium, pass the ball to pipeline.