Product Name: Advantage EP 94k Mini Valve Assembly (Part No. 391007-1)

Description:
This component is a compact pneumatic on/off valve assembly, specifically engineered for 94,000 PSI (approximately 6,480 bar) extreme pressure waterjet cutting systems . The "Mini Valve" designation indicates a more compact form factor compared to standard valve assemblies, making it suitable for applications with limited mounting space. This assembly is an OEM replacement part for H2O Jet systems and is compatible with other major waterjet platforms .

The assembly functions as a high-pressure water switch (on/off valve), controlling the start and stop of the ultra-high-pressure waterjet to the cutting head. It is pneumatically actuated and typically configured as a normally closed (NC) valve, meaning it remains closed when no air signal is applied, requiring compressed air to open and allow water flow to the cutting head.

This universal assembly is a direct replacement for Flow part number 014660-1 and H2O Jet part number 391007-1 . The "Advantage EP" designation indicates enhanced performance features for extreme pressure operation, contributing to smoother and faster valve response compared to older designs .

Applications:

• Controls water flow on/off for 94,000 PSI extreme pressure waterjet cutting systems 

• Mounted between the high-pressure pump outlet and the cutting head assembly

• Suitable for H2O Jet, Flow, and other standard waterjet systems requiring compact valve configuration

• Used in high-production cutting environments requiring rapid and reliable valve cycling 

Features:

• 94,000 PSI Pressure Rating: Engineered for the highest pressure class in waterjet cutting 

• Mini Valve Design: Compact form factor for space-constrained installations

• Pneumatic Actuation: Operates on standard plant air supply (typically 75-125 PSIG)

• OEM Compatibility: Direct replacement for H2O Jet #391007-1 and Flow #014660-1 

• Enhanced EP Design: Provides smoother, faster water flow and reduces hydraulic shock to downstream components 

• Weight: Approximately 2.54 lbs (1.15 kg) 

Maintenance:

When to Replace (Failure Diagnosis) :

• Water Leakage from Cutting Head: If water drips from the mixing tube when the valve is supposed to be closed, internal seals or the valve seat are worn

• Slow or Erratic Valve Response: Delayed opening or closing indicates internal wear or pneumatic issues

• Inability to Build Pressure: If the pump runs but water does not reach the cutting head, the valve may be stuck closed

• External Water Leakage: Visible water weeping from the valve body indicates seal failure

• Scheduled Preventive Maintenance: Recommended as part of minor or major pump rebuild intervals, typically using the 94K Pump Minor Kit (#392026-1) which includes HP Seal Cartridges and Check Valve Repair Kits 

Replacement and Inspection Guidelines:

• Full Depressurization (Critical) : Before any maintenance, place the main electrical disconnect in the OFF position, bleed down all high-pressure lines, and follow lockout/tagout procedures. Severe injury can result if the machine is not properly locked out.

• Check Valve Upgrade Note: When servicing, the check valve components may use upgraded/newer designs (H2O Jet style) which are smoother and faster than older Flow designs. No retrofit adjustment is necessary—simply remove older parts, clean the valve body face, and install the new kit components .

• Component Kit Integration: This mini valve assembly is typically serviced using maintenance kits that include HP seal cartridges and check valve repair kits .

• Lubrication: Apply high-pressure thread lubricant (e.g., silver anti-seize #400001-3) to threads during reassembly to prevent galling .

• O-Ring Care: Apply O-ring lubricant (#400034-2) to seals during installation to prevent pinching and ensure proper seating .

• Torque Compliance: Tighten all connections to the specific torque values listed in the equipment service manual.

• Inspect Valve Body: During rebuild, inspect the valve body bore for scoring, pitting, or damage that could compromise new seals.

• Clean Installation: Perform rebuilds in a designated clean area to prevent contamination of new components with abrasive particles.

Cross-Reference Information:

• H2O Jet #: 391007-1 

• Flow #: 014660-1 

• WSI #: FW014660-1 

• Included in 94K Pump Minor Kit (#392026-1) for complete intensifier service