, Properties and Uses: 1, manual control spool position to change the direction of the oil flow. Second, product technical parameters: 1, manual valve divided plate installed and tube installation. The valve is two or more mobile form and two more ports of the directional control valve. Hydraulic oil flow communication cut off, and change the direction and pressure unloading and order motion control valve. Can be divided into manual valve, solenoid valve, hydraulic valve. Also known as Chris valve, a valve with adjustable multi-channel, can change the flow of fluid in a timely manner. Work through the valve drive transmission mechanism rotation of the drive shaft, with shake the crank arm to start the valve plate, the working fluid and sometimes from the left entrance leads to the lower outlet of the valve, sometimes the right entrance transformation leads to lower export cycle converting the flow of the object. This switching valve has been widely applied in the petroleum, chemical production, the most commonly used in making ammonia gas system. In addition, the valve can also be made of the valve-like structure, used for smaller flows occasions. Work simply turn the hand wheel to transform the working fluid flows through the valve.