The clearance size of the hydraulic valve body and spool is called fit accuracy. The matching precision needs to be strictly controlled within the precise value to ensure the stability of the quality of the solenoid reversing valve. Excessive internal leakage directly affects the working efficiency of the actuator of the hydraulic system, and easily causes faults such as system misoperation.
The mating clearance of hydraulic valve is not a simple pursuit of the more precise the better, but should be based on the requirements of the working conditions, as well as the cost of comprehensive consideration, choose the most appropriate scheme. As we all know, the hydraulic oil in the hydraulic system is easily mixed with small impurities and difficult to completely eliminate.
It is common practice to use a single filter in the tank to filter impurities. However, this relatively simple, low-cost filter has limited accuracy and cannot effectively filter fine impurities. For high precision hydraulic directional valve, it is usually recommended to use high precision filtration equipment such as cotton core, which will cause the supporting cost of the whole system to increase. Therefore, the requirements for the size of the hydraulic directional valve should be flexibly mastered according to the actual work requirements.
