Hydraulic Threaded Cartridge valve is a multifunctional composite valve with the basic components of cartridge valve (spool, sleeve, spring and seal ring) inserted into a specially designed and processed valve body, and equipped with a cover plate and pilot valve. Because each cartridge valve basic component has and only two oil ports, it is called a two-way cartridge valve, and in the early days, it is also called a logic valve.

The two-way cartridge valve has the following characteristics: large flow capacity, small pressure loss, suitable for large flow hydraulic system; The main spool stroke is short, the action is sensitive, the response is fast, the impact is small; Strong anti-oil ability, no strict requirements for oil filtration accuracy; Simple structure, easy maintenance, less failure, long life; The plug-in has the characteristics of one valve and multiple energies, which is convenient to form various hydraulic circuits and work stably and reliably; The plug-in has a high degree of universality, standardization, serialization of parts, can form an integrated system.

The two-way cartridge valve consists of a cartridge element, a control cover plate, a pilot control element and a cartridge block.

Fan drives controlled by hydraulic cartridge valves are quieter and run on less horsepower than mechanical fan drives, providing greater fuel economy for excavators. Control valves with multiple temperature inputs can be used to provide variable fan speed control depending on air temperature, load, and cooling requirements. If the radiator gets clogged, two-position, four-way solenoid valves can automatically reverse fan direction. Electronic control of the hydraulic cooling system can be achieved using either an EFDR1 programmable valve driver or a CoreTek controller (ECU).

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