General Pump 90516500 Anti-Extrusion Backup Ring - 1711
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The General Pump 90516500 is a genuine OEM anti-extrusion ring (also called a backup ring) for General Pump plunger pumps. It sits alongside an O-ring or seal and supports it under high pressure, preventing the softer rubber from being squeezed (“extruded”) into the small gap between mating parts. Without this support, high-pressure cycling can nick, shred, or deform the O-ring, leading to premature seal failure, leaks, and pressure loss.
Anti-extrusion rings wear along with the seals they protect, so it’s best practice to replace them whenever you replace the matching O-rings or seals during a valve or packing service. Using a fresh ring helps new seals last longer and keeps the pump performing at full pressure.
Key features:
- Supports O-rings and seals against high-pressure extrusion
- Extends seal life and helps prevent leaks
- Genuine OEM General Pump part for an exact fit
- Ideal to replace alongside matching seals during pump service