Seal Assembly, HP, 1.125" Plunger, 60K, Hybrid | HJ-20467135
The HJ WATERJET HP Seal Assembly, 1.125 Plunger, 60K (HJ-20467135) is a heavy-duty sealing component designed for high-horsepower waterjet intensifier pumps operating up to 60,000 PSI.
Built for 1.125" plunger systems, the HJ-20467135 HP Seal Assembly is used in larger, high-output intensifiers, where increased flow and pressure demand stronger sealing performance. It ensures leak-free operation, pressure stability, and optimal pump efficiency.
The HJ-20467135 HP Seal Assembly is commonly used in SL-V and SL-VI systems with 75–200 HP ratings, as well as select SL-IV Plus high-horsepower configurations.
Key Benefits
- Handles Higher Flow Rates – Designed for large plunger systems
- Superior Pressure Stability – Maintains consistent cutting pressure
- Leak Prevention – Ensures tight sealing in extreme conditions
- Extended Equipment Life – Protects intensifier components
- Reduced Downtime – Reliable performance in high-production environments
Compatible Pumps
The HJ-20467135 HP Seal Assembly, 1.125 Plunger, 60K is compatible with:
- SL-IV Plus Series (75–200 HP)
- SL-V Series (75–200 HP)
- SL-VI Series (75–200 HP)
These pumps utilize 1.125 plunger intensifier systems, typically found in high-output industrial waterjet applications
Applications
The HJ-20467135 HP Seal Assembly is widely used in:
- Automotive manufacturing (high-volume cutting)
- Aerospace fabrication
- Thick metal cutting operations
- Industrial production environments
- 24/7 waterjet facilities
Frequently Asked Questions
HJ-20467135 is a HJ Waterjet replacement for KMT 20467135 HP Seal Assembly – 1.125" (1.13") Plunger, Hybrid, rated for 60,000 PSI / 4,100 bar. It is primarily for SL-V 75–200 HP systems and, in some applications, SL-IV Plus and SL-VI high-horsepower systems.
1. What is HJ-20467135?
HJ-20467135 is a high-pressure hybrid seal assembly for a 1.125-inch plunger waterjet intensifier. It is part of the HP sealing system that helps maintain pressure and prevent high-pressure water leakage around the plunger.
2. What pressure is HJ-20467135 rated for?
It is designed for 60,000 PSI (4,100 bar) high-pressure waterjet applications.
3. What plunger size does HJ-20467135 use?
The part is designed for a 1.125-inch plunger, commonly described as a 1.13-inch plunger.
4. Which KMT waterjet pumps use HJ-20467135?
The part is primarily associated with KMT SL-V high-pressure intensifiers in the 75–200 HP range. Also identify for certain specialty applications involving SL-IV Plus and SL-VI 75–200 HP units.
5. Is HJ-20467135 a seal kit or a complete sealing head?
It is a seal assembly/HP seal kit, not the complete sealing-head assembly.
6. What does the seal assembly do?
The seal assembly provides the critical sealing interface around the high-pressure plunger. Proper sealing helps maintain 60K PSI operating pressure, prevent leakage, maintain cutting performance, and protect surrounding intensifier components.
7. What symptoms indicate that HJ-20467135 may need replacement?
Typical signs of a worn HP seal assembly can include:
- High-pressure water leakage
- Reduced or unstable cutting pressure
- Increasing water consumption
- Deteriorating pump performance
- Premature wear of related plunger/sealing components
- More frequent intensifier maintenance
8. What happens if the HP seal assembly is worn?
A worn seal can allow high-pressure water to bypass the intended sealing area. This can reduce pump efficiency and pressure stability and may contribute to accelerated wear of other intensifier components.
9. What is the difference between HJ-20467135 and HJ-05149711?
Both are associated with 1.13-inch plunger, 60K PSI HP sealing applications, but 20467135 is the hybrid version, while 05149711 is the standard HP seal assembly.
10. Can HJ-20467135 be used on a 0.88-inch plunger?
No. HJ-20467135 is intended for the 1.125-inch/1.13-inch plunger configuration. Different seal assemblies are used for 0.88-inch plunger systems, such as HJ-20422243 for certain 55–60K applications.
11. Is HJ-20467135 used in high-production waterjet cutting?
Yes. Because it is designed for the 1.125-inch plunger and 60K PSI high-pressure system, it is associated with larger, higher-output intensifier configurations used in demanding industrial cutting applications.
12. What should I check before ordering 20467135?
Verify:
- KMT pump model
- Pump horsepower
- Plunger diameter
- Operating pressure
- Existing seal assembly part number
- Intensifier configuration
This is especially important because several KMT 60K seal assemblies look similar but are designed for different plunger sizes and pump configurations.
19. Is HJ-20467135 interchangeable with every KMT 60K seal?
No. A 60K PSI rating alone is not enough to establish interchangeability. The plunger diameter, intensifier model, horsepower, sealing-head configuration, and application must also match.
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 quality, reliability, and value professionals trust. Premium Performance Without the Premium Price