Some water bottles have a white plastic rubber band inside the lid. Although this rubber band is not large, if it is lost, the sealing of the water bottle will be severely damaged, causing water leakage when the water bottle is placed horizontally or upside down. Similarly, vertical jacks, such as claw jacks, hydraulic jacks, hydraulic jacks, etc., also have a sealing ring inside the oil cylinder. Although this small sealing ring may not look amazing, it actually has a huge effect. It can prevent internal hydraulic oil from leaking through the gap between the top cover and cylinder, and also prevent foreign objects from entering the hydraulic cylinder.

The sealing rings of vertical jacks available on the market come in various colors, commonly including white, black, yellow, etc. The sealing ring is one of the most critical components in hydraulic cylinders, usually installed on the internal piston rod. However, as the usage time increases, the sealing ring will inevitably experience aging, its elasticity performance gradually decreases, the sealing effect deteriorates, and this can lead to oil overflow or leakage. This will not only seriously affect the normal operation of the jack, but the leaked oil will also cause pollution to the environment, increasing the difficulty of subsequent cleaning. In this situation, the operator must promptly replace the sealing ring with the same model and specification in order to restore normal use of the vertical jack.

In a vertical jack, the internal sealing ring is closely attached to the oil cylinder, like a close and inseparable partner, the two complement each other and are indispensable. The sealing ring plays a crucial role in the process of lifting heavy objects, providing strong guarantees for the safe and stable operation of the jack.