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2. Contamination Control Hydraulic oil is susceptible to contamination from dust, dirt, and other external particulates. Seals act as barriers, keeping harmful substances out of the hydraulic system. This is essential for prolonging the life of hydraulic fluid and components, such as pumps and actuators.

4. Manufacturer and Brand The reputation of the manufacturer can also affect prices. Established brands with a track record of quality and reliability might command higher prices compared to lesser-known manufacturers. However, investing in reputable brands may provide better long-term value due to improved performance and reduced maintenance costs.

- Backup Rings Used to prevent the extrusion of the primary seals under high pressure, backup rings enhance the efficacy of rod and piston seals.