ADJUSTABLE DUMP VALVE REPAIR KIT-ADO, MADO,MEFV, OMAX

Adjustable Dump Valve Repair Kit – ADO, MADO, MEFV | HJ-322536

The HJ WATERJET Adjustable Dump Valve Repair Kit – ADO, MADO, MEFV (HJ-322536) is a precision-engineered high-pressure dump valve body rebuild kit designed to restore the sealing performance, pressure regulation stability, and operational reliability of adjustable dump valve assemblies used in ultra-high-pressure OMAX waterjet systems.

With an updated design that offers an improved tapered seat and an erosion shield, the HJ WATERJET Adjustable Dump Valve Repair Kit HJ-322536 contains the critical wear components required to service and rebuild  OMAX adjustable dump valve assemblies found in:

• ADO systems
• MADO systems
• MEFV valve assemblies
• Ultra-high-pressure waterjet intensifier pumps

The ADO, MADO, MEFV Adjustable Dump Valve Repair Kit HJ-322536 restores several critical functions within the ultra-high-pressure waterjet system by:

• Rebuilding the dump valve body assembly
• Restoring reliable pressure release control
• Improving hydraulic sealing performance
• Stabilizing intensifier pressure cycling
• Reducing internal leakage and wear

The HJ WATERJET Adjustable Dump Valve Rebuild Kit HJ-322536 is essential for:

• Reliable ultra-high-pressure operation
• Stable pressure generation
• Efficient cutting performance
• Reduced maintenance downtime

Properly functioning adjustable dump valves are critical for maintaining safe operating pressure and protecting intensifier components from excessive hydraulic stress and pressure in

The HJ-322536 Adjustable Dump Valve Repair Kit  is commonly associated with the following OMAX-style waterjet components:

These components work together to maintain stable pressure regulation, reliable sealing performance, and efficient ultra-high-pressure waterjet cutting operation.

Key Benefits

✔ Improved dump valve sealing integrity
✔ Enhanced pressure stability
✔ Reduced internal leakage
✔ Improved valve response time
✔ Increased wear resistance
✔ Longer maintenance intervals
✔ Reduced downtime and repair costs

Applications

• CNC abrasive waterjet cutting systems
• Aerospace manufacturing
• Precision metal fabrication
• Stone and glass processing
• Composite material cutting
• Automotive manufacturing
• Continuous industrial production environments

Frequently Asked Questions 

1. What is HJ-322536?
HJ-322536 is a replacement for OMAX #322536 that is an Adjustable Dump Valve / Adjustable Dump Orifice (ADO) Body Rebuild Kit designed for rebuilding ADO assemblies used in OMAX waterjet pump systems.

2. What does HJ-322536 replace?
HJ-322536 replaces the earlier OMAX #306500 ADO rebuild kit.

3. What equipment is HJ-322536 used on?
The kit is used with ADO, MADO, and MEFV adjustable dump valve/orifice assemblies on OMAX waterjet systems.

4. What components are included in the 322536 rebuild kit?
The rebuild kit is reported to include components such as the tapered seat, stem assembly, seal assembly, seal guard, seal backup, O-ring, and erosion shield.

5. Does HJ-322536 include the adjustable dump valve body?
No. It is a rebuild kit for the body assembly rather than the complete body. The updated tapered seat included with the kit is designed for use with the OMAX 322513 Adjustable Dump Orifice Body.

6. Can HJ-322536 be used with HJ-306482?
No. The improved tapered seat supplied in the 322536 kit should not be used with the older 306482 Adjustable Dump Orifice Body.

7. What is the difference between HJ-322536 and HJ-306500?
HJ-322536 is the updated rebuild kit that incorporates an improved tapered seat design. It replaces the previous HJ-306500 kit.

8. When should the HJ-322536 rebuild kit be replaced?
It should be considered when the adjustable dump valve develops leaks, inconsistent pressure control, poor sealing, excessive wear, or abnormal operation. Rebuilding worn components helps restore proper valve operation and reduce unplanned downtime.

9. What are the symptoms of a worn ADO valve?
Common symptoms can include water leakage, unstable pressure, difficulty maintaining pressure, excessive wear around the seat or stem, and inconsistent dump-valve operation.

10. Is HJ-322536 a pump rebuild kit?
No. HJ-322536 is specifically an adjustable dump valve/orifice body rebuild kit, not a complete intensifier pump rebuild kit.

11. Is HJ-322536 a cutting head part?
No. It is a pump-side adjustable dump valve/orifice component and is not part of the OMAX cutting head assembly.

12. Can I replace individual components instead of the complete 322536 kit?
Individual ADO components are available, including the stem assembly, seal assembly, seal guard, seal backup, and other components. However, when multiple internal components show wear, replacing the complete rebuild kit can be a more efficient maintenance solution.

13. What is the purpose of the adjustable dump valve/orifice?
The adjustable dump assembly is part of the waterjet pump''''''''s pressure-control and depressurization system. Proper operation allows the system to control and release high-pressure water as required.

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