According to the refrigeration mode of the station, the hydraulic valve block can be divided into: 1. 2. Forced refrigeration: forced refrigeration is carried out by refrigerator, which is generally used in the system with oil tank capacity greater than 250 L.

The processing of hydraulic valve block, many people may only focus on technical issues, will ignore some auxiliary processing of hydraulic valve block, in fact, in the whole process of hydraulic valve block processing, auxiliary processing plays a very important part. Auxiliary processing includes valve body cleaning, parts deburring, heat treatment residue removal and cleaning.

Drilling and tapping shall be carried out according to the design requirements of the hydraulic valve block processing drawings: the slender hole shall be processed first, and then the short and coarse hole shall be processed.

The blackening of valve block is also called bluing, which is a surface treatment process that the workpiece forms a layer of blue or black oxide film on the surface of the workpiece at room temperature or heated to an appropriate temperature in air, steam or chemical solution to improve its corrosion resistance and appearance.