Sealing Head Assembly, HP, .875 Plunger, 60K | HJ-20481005
The HJ-20481005 Sealing Head Assembly is a new-style high-pressure sealing head assembly designed for KMT-Style waterjet intensifier pumps using a .875-inch plunger and 60,000 PSI operating pressure. This sealing head is part of the intensifier pump topworks and is designed to support reliable high-pressure waterjet pump operation.
The HJ-20481005 Sealing Head Assembly is engineered for applications requiring dependable sealing and high-pressure performance in demanding waterjet cutting environments. It works with the associated KMT-Style check valve components used in .875-inch plunger systems.
For rebuild and service applications, this sealing head assembly utilizes the HJ-05133335 HP Discharge Check Valve Repair Kit or the HJ-72185957 HP Inlet/Outlet Check Valve Repair Kit, depending on the applicable configuration. Always verify the pump model, plunger size, pressure rating, and existing sealing-head configuration before ordering.
Key Features
- HJ Waterjet HJ-20481005 is a direct replacement for KMT Part Number: 20481005
- Product: Sealing Head Assembly
- Application: High-pressure waterjet intensifier pump
- Plunger Size: .875 inch
- Pressure Rating: 60,000 PSI / 60K
- Component Category: Intensifier Pump Topworks
- Assembly Type: High-pressure sealing head assembly
- KMT Engineering Title: SEAL HD ASSY-SLV,HSEC,
- Designed for use with applicable KMT .875-inch plunger, 60K waterjet intensifier configurations
- Compatible repair components include HJ-05133335 Discharge Check Valve Repair Kit and HJ-72185957 Inlet/Outlet Check Valve Repair Kit, depending on configuration.
Application
The sealing head is an important component within a high-pressure waterjet intensifier pump. Proper sealing at the high-pressure end of the intensifier is critical for maintaining pressure, minimizing leakage, and supporting consistent pump performance.
A worn or damaged sealing head assembly can contribute to pressure loss, water leakage, inconsistent pump operation, and increased maintenance requirements. Replacing the sealing head assembly with the correct configuration can help restore the high-pressure section of the pump to proper operating condition.
The HJ-20481005 is specifically associated with .875-inch plunger, 60K waterjet intensifier applications, making accurate part-number and configuration verification important before replacement.
Related Waterjet Parts
For maintenance and rebuild applications, related components include:
- HJ-05133335 — HP Discharge Check Valve Repair Kit, .875 Plunger, 60K
- HJ-72185957 — HP Inlet/Outlet Check Valve Repair Kit, .875 Plunger, 60K
- HJ-20481009 — Sealing Head Body, HP, .875 Plunger, 60K
- HJ-05149703 — Seal Assembly, HP, .875 Plunger, 60K
- HJ-20497767 — Cylinder Liner, HP, .875 Plunger, 60K
- HJ-05112768 — Discharge Seat, HP, .875 Plunger, 60K
Why the Sealing Head Matters
Waterjet intensifier pumps operate under extremely high pressure, making the sealing system a critical part of pump reliability. The sealing head works with the plunger, cylinder, seals, and check-valve components to maintain the high-pressure water circuit required for waterjet cutting.
Frequently Asked Questions | HJ-20481005
What is HJ-20481005?
HJ Waterjet HJ-20481005 is a direct replacement for KMT 20481005 High-Pressure Sealing Head Assembly for KMT-Style waterjet intensifier pumps using a .875-inch plunger at 60,000 PSI (60K). It is part of the high-pressure topworks section of the waterjet pump.
Is HJ-20481005 a complete sealing head assembly?
Yes. HJ-20481005 is identified as a Sealing Head Assembly, HP, .875 Plunger, 60K, rather than simply an individual seal or sealing component.
When should a sealing head assembly be replaced?
A sealing head assembly should be inspected when a waterjet intensifier develops high-pressure water leakage, pressure loss, inconsistent pump performance, excessive wear, or recurring seal and check-valve problems. The actual cause should be diagnosed before replacing components.
Can the HJ-20481005 sealing head be rebuilt?
Depending on the condition and configuration, individual sealing and check-valve components may be serviced or replaced rather than replacing the entire assembly. The appropriate repair components should be selected based on the specific pump and sealing-head configuration.
What are the symptoms of a worn waterjet sealing head?
Common symptoms can include high-pressure water leakage, reduced or unstable pressure, increased water consumption, shortened seal life, and abnormal intensifier operation. These symptoms can also result from worn plungers, cylinder liners, seals, check valves, or other high-pressure components, so proper troubleshooting is recommended.
What is the difference between a sealing head assembly and a sealing head body?
A sealing head assembly is a more complete component assembly, while a sealing head body generally refers to the main body component itself. HJ-20481005 is identified as the Complete Sealing Head Assembly, while HJ-20481009 is identified as the Sealing Head Body for the applicable configuration.
Why Choose HJ Waterjet?
HJ Waterjet replacement parts are engineered to deliver premium-quality, reliable performance, precision fit, and long-lasting durability at a competitive price. Precision manufactured to exact specifications using high-quality materials and tight tolerances, our components are designed for compatibility with OEM waterjet systems and demanding industrial applications. By focusing on quality, precision, and value—not expensive branding—we help manufacturers reduce maintenance costs, minimize downtime, and maximize productivity without compromising performance or reliability. When precision matters, HJ Waterjet delivers the proven quality, reliability, and value professionals trust. Premium Performance Without the Premium Price