The cleaning of hydraulic valve parts is a key auxiliary process in the production of hydraulic parts. Its quality restricts the reliability and stability of hydraulic valves. Cleaning quality has a great relationship with cleaning method, preparation of cleaning liquid, cleaning equipment and personnel responsibility. Next come to Dalan Hydraulic System Manufacturer to tell you about the cleaning of hydraulic valve body and parts.

I. Cleaning of Valve Body

The cleaning of the valve body can be divided into four stages: rough cleaning, ultrasonic cleaning, rinsing, medium pressure and large flow washing. Rough cleaning and rinsing should be grooved cleaning, the method can be used with a certain pressure of air-water flushing, grinding valve body should be scratched burr, demagnetization, polishing and other pretreatment. The formula of roughing and rinsing solution is the same. After rinsing, it is washed with large flow diesel oil or water solution with antirust agent. 超声波清洗液须进行循环处理，并在循环中补充清洗剂，以提高清洗效能。

Discussion on Cleaning of Hydraulic Valve Parts

Notes in cleaning:

(1) The choice of cleaning agent and rust-proof agent should be reasonable, and there should be a distinction between ferrous metal and non-ferrous metal, even between summer and winter.

(2) The water temperature should be able to meet the requirements, and the soaking time of parts should not be too short, generally controlled in more than 10 minutes;

(3) Increase the flow rate of water during roughing and rinsing as much as possible;

(4) Parts should be dried when conditions permit.

(5) When flushing, the punch and valve body should rotate or move relatively.

2. Cleaning of Parts

At present, the general manufacturers pay more attention to the cleaning of valve body, but pay less attention to the cleaning of parts such as sliding valves. However, in actual production, the failure of the cleanliness of sliding valves leads to the decline of assembly qualification rate and the decrease of factory reliability. Cleaning parts, because of a variety of types, the workload is also large. Parts cleaning includes cleaning burrs and dirt, chromium-plated parts also include cleaning of residual chromic acid in the inner hole. Parts cleaning can be done by ultrasonic cleaning and then by gas-hydration flushing. Cleaning of the inner hole before cleaning is more important. The dirt in the inner hole can be removed by drills or reamers of the same diameter and brushes. Fine inner holes should also be checked one by one. The cleaning equipment and methods of parts are similar to those of valves, but high pressure and low flow gas-water flushing should be used instead of high pressure flushing with diesel oil or water solution of antirust agent. After cleaning, antirust treatment can be carried out.