Such as hong jinggong (xiamen) electronic technology co., LTD., a large supply of Taiwan DTL pan long a series of products, Taiwan DTL pan long cartridge valve is the pipe type, plate type, superposition type, two through cartridge type after a new type of valve components. The product has the obvious characteristics of small volume, light weight, no oil leakage, strong reliability of system combination, etc. Each component of the control system can be independently tested before being assembled into an integrated valve block; The integrated block can be tested as a whole before being sent to the user, and the complete control system with cartridge valve design can greatly reduce the manufacturing time for the user. Valve has been widely used in a variety of construction machinery, material handling machinery, metallurgy, machine tools and agricultural machinery