Опорное кольцо, внутренний диаметр 155,04 мм Caterpillar 5239717

The Backup Ring used in the hydraulic cylinder piston helps to provide a reliable and leak-free seal between the piston and the cylinder bore. It is made from a flexible material such as rubber and acts as a mechanical barrier by preventing the primary seal from being pushed into the extrusion gap, which could lead to leakage.Attributes:• Maintain their original shape even when compressed• Offers good resistance against wear and abrasionApplications:The Backup Ring helps in maintaining proper lubrication along with the primary sealing elements and undergoes repeated compression and decompression cycles as the piston moves within the cylinder piston and maintains its sealing integrity.