ON/OFF REPAIR KIT, NEW UPGRADED DESIGN

HJ-303639

OMAX PART NUMBER:303639

PRODUCT DESCRIPTION


The HJ-303639 On/Off Valve Repair Kit MAXJET (Upgraded Design) is a precision-engineered, high-performance rebuild kit developed to restore and enhance the reliability of OMAX MAXJET cutting heads, including MAXJET 5 Tilt-A-Jet (TAJ) systems.

This new improved, long-lasting HJ-303639 On/Off Valve Repair Kit includes all essential wear components required to rebuild the on/off valve assembly, ensuring consistent cutting performance, precise water control, and extended service life in ultra-high-pressure waterjet systems operating up to 60,000 PSI (60K)

The following is what makes our new enhanced design premium:

🔹 Enhanced Seal Technology

  • Uses high-performance sealing materials for improved resistance to pressure, heat, and abrasion
  • Reduces premature wear and leakage

🔹 Reinforced Backup Ring Design

  • Improved extrusion resistance under extreme 60K PSI pressure
  • Extends overall seal life

🔹 Precision-Machined Valve Seat

  • Optimized sealing surface for cleaner shutoff and reduced leakage
  • Improves valve efficiency and reliability

🔹 Upgraded Poppet / Valve Element

  • Enhanced wear resistance for high-cycle operation
  • Maintains consistent valve response over time

🔹 Improved Surface Finishing

  • Reduced friction between moving parts
  • Smoother actuation and faster response

 UPGRADED KIT COMPONENTS INCLUDE:

  • Enhanced valve seat (precision-machined)
  • Upgraded poppet / valve element
  • High-performance seals
  • Advanced O-rings (multi-material compatibility)
  • Reinforced backup rings
  • Internal wear components (as required for full rebuild)

Key Benefits

  • Longer service life vs standard kits
  • Improved resistance to abrasive contamination
  • Faster valve response and cleaner shutoff
  • Reduced leakage and pressure loss
  • Lower maintenance frequency and downtime
  • Upgraded High-Durability Design
  • Extended Seal and Component Life
  • Optimized for 60K PSI Systems
  • Improved Valve Response and Shutoff
  • Reduced Downtime and Maintenance Costs

Applications

  • OMAX abrasive waterjet cutting machines
  • OMAX multi-axis bevel cutting heads (TAJ systems)
  • MAXJET 5 (TAJ) assemblies
  • High-production manufacturing
  • Precision cutting (metal, glass, composites

** HJ WATERJET IS IN NO WAY AFFILIATED WITH GMA, EBBCO, KENNAMETAL, KMT, FLOW, BFT, H2O, OMAX, ACCUSTREAM, HYPERTHERM OR TECHNI. PART NUMBERS ARE FOR CONVENIENCE ONLY.

© 2026 HJ WATERJET. ALL RIGHTS RESERVED.

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