When the hydraulic system leaks, it will be difficult to establish the system pressure, the leakage will pollute the environment, affect production, and even the consequences are extremely serious and incalculable. When the seal structure design is unreasonable, the selection of seals is not in line with the specification or the selection of dust seal is inappropriate, dust and other dirt are easy to enter the system, damage the seal and cause leakage. Therefore, when designing and selecting seals, it is necessary to comprehensively consider the compatible type of sealing materials and hydraulic oil, load condition, limit pressure, working speed and environmental temperature change, and select reasonable seals and appropriate dust seals. Due to the strict requirements of hydraulic components and seals on dimensional tolerance, surface treatment, surface roughness and form and position tolerance, if the treatment of details in the manufacturing process is out of tolerance, the seals are easily deformed, scratched, not compacted or over compacted, resulting in the failure of sealing function, it is necessary to pay close attention to the design and processing of hydraulic components and sealing parts.
When assembling hydraulic components, random operation and improper force, especially knocking cylinder block and sealing flange with copper bar, can easily damage the seal and cause leakage. Therefore, when assembling components, professional equipment should be used for clamping to avoid scratching the high-precision working surface or seals.
