Five step method for cleaning hydraulic valves

A complete hydraulic system inevitably includes various types of hydraulic valves, such as directional valves, relief valves, pressure reducing valves, etc. When we maintain and clean the hydraulic system, how to clean these hydraulic valves? Today, we will take you to learn about the knowledge of hydraulic valve cleaning.

Precautions for cleaning hydraulic valves:

During the maintenance process of hydraulic valves, dismantling and cleaning the hydraulic valves is the first step. In the actual use of hydraulic equipment, due to hydraulic oil contamination, oil stains may settle or some granular impurities may exist in the hydraulic oil, which can cause hydraulic valves to malfunction. Usually, these faults can be eliminated after disassembly and cleaning, so that the hydraulic valve can restore its function.

Hydraulic valve cleaning steps:

(1) Dismantling. For hydraulic valves, although most of their components are connected by bolts, they are not disassembled during design. If they are forcibly disassembled due to a lack of specialized equipment or professional technology, the possible result may be damage to the hydraulic valve. Therefore, before disassembly, maintenance personnel should master the structure of the hydraulic valve and the connection method between various parts. During the disassembly process, the positional relationship between different parts should be recorded.

(2) Check and clean. Inspect the valve body and core components to observe their dirt deposition. On the basis of not causing damage to the working surface, use a brush, cotton yarn, and non-metallic scraper to remove concentrated dirt.

(3) Coarse washing. Place the valve core and valve body on the cleaning box tray, heat and soak them, pass compressed air at the bottom of the cleaning tank, and use the stirring effect generated by bubbles to clean the remaining dirt. If conditions permit, ultrasonic cleaning is feasible.

(4) Fine. First, perform high-pressure positioning cleaning with cleaning solution, and then dry with hot air. Under the conditions of the enterprise, existing fresheners can be selected, and organic cleaning agents can also be used in some special occasions, such as gasoline and diesel.

(5) Assembly. Assemble according to the schematic diagram of the hydraulic valve or the recorded assembly relationship of the parts during disassembly. During the assembly process, care should be taken to prevent damage to the parts. For some original sealing materials, they are easily damaged during actual disassembly, so they should be replaced during assembly.

After using hydraulic valves for a long time, it is inevitable that they will malfunction, which will affect the performance of the hydraulic system. We use scientific and reasonable methods to repair hydraulic valve faults and solve them effectively, which is an important means to ensure the normal use of hydraulic equipment.