CA3G8507 3G-8507 3G8507 URE Buffer Sealing Ring Fits CAT Wheel Scraper

CA3G8507 3G-8507 3G8507 URE Buffer Sealing Ring Fits CAT Wheel Scraper

Description: 

Seal shape: D type

Used as a spare connecting rod seal to protect the connecting rod when the system pressure suddenly increases.

All hydraulic cylinders must be equipped with a dust ring. When the piston rod returns, the dust-proof ring will scrape off the dirt stuck on its

surface to protect the sealing ring and the guide sleeve from damage. The double-acting dust ring has an auxiliary sealing function, and the inner

lip scrapes off the oil film adhering to the surface of the piston rod, thereby improving the sealing effect. Dust seals are extremely important to

protect critical hydraulic equipment components. Infiltration of dust will not only wear the seals, but also greatly wear the guide sleeve and piston

rod. The impurities entering the hydraulic medium will also affect the functions of the operating valves and pumps, and may damage these

devices. The dust ring can remove the dust on the surface of the piston rod, but does not damage the oil film on the piston rod, which is also

beneficial to the lubrication of the seal. When the dust ring is designed, it must not only adapt to the piston rod, but also play a sealing role in the

groove.

Dynamic function: For an effective dust ring, the contact force of its lip relative to the piston rod must be large enough. Elastic materials with

relatively high hardness are the easiest to achieve this effect. Polyurethane with a hardness of 94° is particularly suitable as a material for dust-

proof rings. Its characteristics also include high modulus (hardness), excellent wear resistance and low compressibility. This material can be used

in most applications in the temperature range from -40° to 100°.

Static function: The non-reinforced single-acting dustproof ring designed for closed installation grooves is difficult to effectively seal in the groove.

This is because the dustproof ring is loosely installed in the groove. Only the contact between the sealing lip and the piston rod provides the

sealing force between the dust ring and the cylindrical surface. When the temperature drops, the entire dust ring shrinks, and the risk of leakage

between its outer diameter and the groove will appear. To achieve satisfactory results, this situation must be compensated in the design of the

dust ring.

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