КОЛЬЦО Caterpillar 2U7279

The Hoist Control Relief Valve Backup Ring is a sealing reinforcement component used within the hoist control relief valve assembly to prevent deformation or extrusion of primary seals under high hydraulic pressure. It works in conjunction with sealing elements to provide structural support when pressure exceeds normal operating levels. During lifting and lowering operations, hydraulic systems generate fluctuating pressure, and this ring stabilizes the sealing interface to retain fluid within designated pathways.Attributes:• Strengthens the sealing arrangement against high-pressure flow. • Improves reliability of the hoist hydraulic control system.• Enables consistent pressure regulation during hoist operation.Applications: The Hoist Control Relief Valve Backup Ring is installed inside the hoist control relief valve, where hydraulic pressure is regulated during lifting and lowering operations.