Cheapest rubber sealing ring on sales often has oil leakage, water leakage, grease leakage, etc., which is caused by internal and external factors of the seal. Let's talk about the reasons why Cheapest rubber sealing ring on sales is not tightly sealed.
1. Hydraulic shock
There are many factors that produce hydraulic shock, such as the moment when the excavator bucket suddenly hits the stone, and the crane lifts or puts down the heavy object. In addition to external factors, for high-pressure and large-flow hydraulic systems, when the actuator (hydraulic cylinder or hydraulic motor, etc.) changes direction, if the performance of the reversing valve is not good, it is easy to produce hydraulic shock. The instantaneous high pressure generated by the hydraulic shock may be several times the working pressure of the system. Such a high pressure will tear the oil seal or squeeze it into the gap in a short time, causing serious damage. Generally, the cylinder with hydraulic shock should install a buffer ring and a retaining ring on the piston rod.

2. Working medium
In addition to selecting the working medium strictly in accordance with the manufacturer's recommendations, it is essential to keep the working medium clean. The aging or contamination of the oil will not only cause the components in the system to fail and accelerate the aging and wear of the oil seal, but also the dirt in it may scratch or embed the oil seal, making the Cheapest rubber sealing ring on sales seal failure. Therefore, it is necessary to regularly check the oil quality and its cleanliness, and replace the oil filter or oil according to the maintenance specifications of the equipment. The air remaining in the oil in the oil cylinder will be compressed by high pressure, which will cause high temperature to burn out the oil seal, or even carbonize. In order to avoid this situation, exhaust treatment should be carried out at the beginning of the hydraulic system operation. The hydraulic cylinder should also run at low pressure and slow speed for several minutes to confirm that the air remaining in the oil has been exhausted before it can work normally.