Application of Cartridge Valve in Hydraulic System，Through more complex combinations, more hydraulic valve functions can be achieved. Through the combination, the cartridge valve can be used as a pressure control valve (sequence valve, pressure reducing valve), flow control valve (one-way throttle valve, throttle valve), directional control valve (speed control valve, hydraulic control one-way valve, two Two-way reversing valve, etc.) and compound valve.At present, the cartridge valve has the following series: K series cartridge valve, L series cartridge valve, TJ series cartridge valve, Z series cartridge valve.

Simple identification method of hydraulic oil quality，In the absence of special testing equipment, we have summarized several methods to easily detect and identify the quality of hydraulic oil.Visual inspection method. If the oil is milky white and turbid, it means that the oil contains a lot of water. Combustion method. Dip a small amount of oil to be tested with clean, dry cotton yarn or tissue paper, and then ignite it with fire. If there is a "crack" popping sound or flashing phenomenon, it means that the oil contains more water.

Maintenance knowledge of hydraulic oil,Performance requirements of hydraulic oil,Different brands of hydraulic oil must not be mixed,The influence of contaminated impurities in hydraulic oil on hydraulic oil,The influence of dust,Water hazards,Filtration of dust and water,Change hydraulic oil regularly,When hydraulic oils of different brands are mixed together, they will not be able to exert the performance of the hydraulic oil, and will produce sediments, which will greatly reduce the output power.