Normally Closed Pneumatic Water-Only Cutting Head Assembly (6-Inch Nozzle Tube) | HJ-10178168
The HJ WATERJET HP Pneumatic Valve Water-Only Cutting Head Assembly, 3/8" Nozzle Nut X 6” NOZZLE, 60K (HJ-10178168) is a complete high-pressure cutting head solution designed for water-only waterjet systems operating up to 60,000 PSI (4,100 bar).
The HJ-10178168 HP Pneumatic Valve Water-Only Cutting Head Assembly integrates a normally closed (NC) pneumatic valve, 6” nozzle tube, and 3/8" nozzle nut connection, delivering precise control of high-pressure water flow for clean, accurate cutting.
Key Benefits
- Complete Cutting Head Solution – Ready-to-install assembly
- Precision Flow Control – Accurate on/off waterjet control
- Fail-Safe Operation – NC valve improves safety
- High Pressure Reliability – Designed for continuous 60K use
- Reduced Downtime – Replace full assembly vs troubleshooting components
Applications
- Food processing (water-only cutting)
- Automotive interior trimming
- Foam, rubber, and gasket cutting
- Plastic and soft material cutting
- Clean-cut applications (no abrasive)
Frequently Asked Questions | HJ-10178168
- What is HJ-10178168?
HJ-10178168 is a HJ waterjet direct replacement for KMT 10178168 Pneumatic, Normally Closed, Water-Only cutting head/valve assembly designed for high-pressure waterjet cutting at approximately 60,000 PSI.
- Is HJ-10178168 for abrasive or pure-water cutting?
It is primarily a water-only/pure-water cutting head. It can be adapted for abrasive cutting with the appropriate nozzle tube, nozzle nut, and abrasive cutting-head components.
- What nozzle tube does HJ-10178168 use?
The assembly is commonly supplied with a 3/8" Nozzle-Nut Connection (HJ-B2841) and a 6" Nominal Nozzle Tube (HJ-10138428).
- Does HJ-10178168 include the nozzle nut?
Yes. References describe the assembly as including a 3/8" nozzle nut(HJ-B2841).
- Does HJ-10178168 include an orifice?
The HJ-10178168 does not include the orifice. (Orifice Sold Separately)
- What does “normally closed” mean?
The valve remains closed when pneumatic control pressure is not applied. When actuated, it opens to allow high-pressure water to flow through the cutting head.
- What pressure is HJ-10178168 rated for?
It is associated with 60K PSI waterjet systems.
- What are the main components associated with HJ-10178168?
Common associated components include the actuator assembly, valve stem, valve body, seal assembly, pneumatic valve seat, nozzle tube, nozzle-tube gland, and 3/8" nozzle nut.
- What actuator is used with HJ-10178168?
HJ Waterjet lists HJ-10177855 - Actuator Assembly, HP, Normally Closed, 60K as being used in the HJ-10178168 water-only cutting-head assembly..
- What seal/repair kit is associated with HJ-10178168?
Common replacement references include HJ-05116025 and related seal assemblies such as HJ-10178978 / HJ-20428052, depending on the specific configuration.
- Can HJ-10178168 be rebuilt instead of replacing the complete assembly?
Yes. Individual components such as the actuator, valve stem, valve body, seat, and seals are available, making repair/rebuild a practical alternative to replacing the entire assembly.
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