Product Name: Seal Hoop (Part No. 20457393)

Description:
The Seal Hoop 20457393 is a high-pressure dynamic sealing ring used in waterjet intensifier pumps and on/off valves. It is designed to prevent fluid bypass around a reciprocating piston or plunger under ultra-high pressure. Typically manufactured from wear-resistant materials such as polyurethane (PU) or PTFE composite, it serves as a critical consumable wear part. This seal is often included in factory seal repair kits and is engineered to withstand pressures up to 60,000–90,000 PSI.

Applications:

• Sealing the high-pressure cylinder and intensifier pump assemblies.

• Installed as part of the piston seal assembly or water on/off valve.

• Commonly replaced during major pump rebuilds or when leaks develop.

Features:

• High Wear Resistance: Designed as a sacrificial component to protect metal parts.

• High-Pressure Operation: Suitable for extreme pressure cycles common in waterjet cutting.

• Precision Fit: Manufactured to OEM tolerances to ensure correct stack compression.

• Kit Component: Typically replaced alongside O-rings and backup rings in a complete seal kit.

Maintenance:

• Replace as a Set: Always replace the seal hoop as part of a complete seal kit when servicing the pump or valve.

• Preventive Schedule: To avoid unplanned downtime, replace these seals based on operating hours (e.g., every 500–1,000 hours) rather than waiting for failure.

• Inspect Mating Surfaces: Check the plunger and cylinder bore for scoring or damage before installing new seals; damaged metal parts will ruin new seals.

• Full Depressurization: Always fully depressurize the waterjet system (hydraulic and water circuits) and follow lockout/tagout procedures before replacement.