Seal Assembly, UHP, .875 Plunger, PRO I, 90,000 PSI | HJ-20479499
The HJ Waterjet HJ-20479499 UHP Seal Assembly is a premium high-quality replacement designed for ultra-high-pressure waterjet intensifier pumps operating at 90,000 PSI (6,200 bar). Manufactured from high-performance sealing materials engineered to withstand extreme pressure, abrasive operating environments, and continuous industrial production, this HJ-20479499 UHP Seal Assembly delivers exceptional reliability, leak-free performance, and maximum pump efficiency.
This HJ-20479499 UHP Seal Assembly fits .875-inch (7/8") plunger intensifier pumps used on select PRO-I systems with 60 HP and 125 HP ratings. It installs without modification while maintaining the same fit, dimensions, tolerances, and sealing performance as the original component.
Every HJ Waterjet seal assembly is precision manufactured to provide outstanding resistance against extrusion, wear, pressure cycling, and thermal stress. By maintaining a superior hydraulic seal between the high-pressure plunger and cylinder, it minimizes internal leakage, stabilizes cutting pressure, and helps maximize the lifespan of expensive pump components.
Key Features
- Designed for 90,000 PSI (6,200 Bar) ultra-high-pressure systems
- Fits .875" (7/8") plunger intensifier pumps
- Precision engineered for leak-free sealing performance
- Excellent resistance to wear, friction, pressure cycling, and heat
- Reduces internal leakage and pressure loss
- Helps extend cylinder liner and plunger service life
- Improves pump efficiency and cutting consistency
- Manufactured to strict dimensional tolerances
- Fast, direct installation with no modifications required
Compatible Equipment
Compatible with select ultra-high-pressure intensifier pumps using:
- .875" Plunger
- 90,000 PSI operating pressure
- Select PRO-I 60 HP systems
- Select PRO-I 125 HP systems
Applications
Ideal for demanding industrial waterjet cutting applications including:
- Aerospace manufacturing
- Steel fabrication
- Aluminum cutting
- Stone and granite processing
- Glass cutting
- Ceramic manufacturing
- Composite materials
- Automotive production
- Industrial manufacturing
- Precision waterjet machining
Benefits of Choosing HJ Waterjet
HJ Waterjet replacement components are engineered to deliver the same precision, dimensions, and performance expected from OEM parts—without the premium OEM price. Our components are manufactured to exacting quality standards for dependable operation in the most demanding waterjet environments.
Benefits include:
- OEM-quality fit and function
- Reliable high-pressure sealing
- Longer maintenance intervals
- Reduced downtime
- Consistent cutting pressure
- Lower total operating costs
- Exceptional durability in continuous production environments
Why Replace Your Seal Assembly?
Over time, high-pressure seals experience wears due to constant pressure cycling, abrasive water conditions, and normal operation. Replacing worn seals before failure helps prevent:
- Pressure loss
- Water leakage
- Reduced cutting performance
- Premature plunger wear
- Cylinder liner damage
- Unexpected pump downtime
- Costly repairs
Routine maintenance with high-quality HJ Waterjet seal assemblies keeps your intensifier operating at peak performance while protecting expensive high-pressure components.
Product Specifications
- Product: Ultra High-Pressure Seal Assembly
- Brand: HJ Waterjet
- Pressure Rating: 90,000 PSI (6,200 Bar)
- Plunger Diameter: .875" (7/8")
- Replacement For: KMT 20479499
- Pump Type: Ultra High-Pressure Intensifier Pump
- Installation: Direct OEM Replacement
- Quality: OEM Equivalent
- Performance: Industrial Continuous Duty