In the hydraulic system, whether it is a metal pipe joint or a hose joint, there is a problem of easy leakage. For bite-type pipe joints, most of the pipes are subjected to greater external force or impact, which causes the pipe to loosen or the pipe end surface is deformed and cause leakage. At this time, check whether the pipe is out of round, whether the cutting edge is defective, and whether the pipe end is Intact and the compression degree of the ferrule nut, etc., and at the same time eliminate the external force of the pipeline. For flared pipe joints, mostly due to excessive flaring, substandard quality or multiple disassembly, resulting in flaring deformation or cracks, etc., causing leakage. At this time, the front end can be cut off and flared again. If the male and female cone top pressure is used for sealing, the leakage is mostly due to the damage of the two cone surfaces, and the cone surface can be ground with abrasive sand.
In some occasions where the "о" ring is sealed by the end face or outer diameter, the leakage causes are as follows: the "о" ring is aging or deformed to cause leakage; the "о" ring is not assembled in place, so that the two planes are connected When the pressure is uneven or the "о"-shaped ring is cut to cause leakage; the "о"-shaped ring is not compacted, and the amount of elastic deformation is insufficient to cause leakage; the "о"-shaped ring is too deep to cause leakage. In this regard, it is necessary to re-select the "о" ring with the same outer diameter and thicker cross-section, or cut or grind the sealing surface with the spigot groove to reduce the depth of the spigot groove to make the "о" The ring has sufficient elastic deformation (compression should generally be between 0.35-0.65mm). For leaks at pipe joints using oil-resistant rubber sheets, wool felt, soft steel cardboard, combined sealing gaskets or sealants, no matter what the material is, first check whether the seals are damaged, deformed, aging, and excessively rough. And then take corresponding measures.
