Product Name: 2-Way Straight Valve, 3/8" – Part No. 10078863

Description:
This component is a 2-way straight high-pressure valve, specifically designed for 3/8 inch waterjet cutting systems . According to manufacturer documentation, this valve is rated for 60,000 PSI (approximately 4,137 bar) operation and is constructed from high-strength stainless steel for durability in demanding waterjet environments .

The "2-way" designation indicates it has two ports (one inlet, one outlet), providing straight-line on/off control of high-pressure water flow. Unlike an angle valve, this straight configuration allows for inline installation without changing flow direction, making it ideal for main transmission lines where space is not constrained . The valve utilizes industry-standard 3/8 inch cone-and-thread (FT) connections, making it compatible with standard high-pressure fittings, gland nuts, and coned inserts.

This valve is an OEM-equivalent replacement part, cross-referenced with multiple industry part numbers including Flow A-0788-3, AccuStream 1-13166-60-6, KMT 10078863 and 49864382, H2O Jet 400072-2-2, and WSI FT60VM6071 . It is listed as Item 2 in Table 12-54 (High Pressure Fitting and Valve Assemblies) . The product weight is approximately 0.5 kg (1.1 lbs) .

Applications:

• Provides straight-line on/off control of high-pressure water flow in waterjet cutting systems 

• Installed between the intensifier pump outlet and the cutting head assembly for main flow control

• Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI (4,137 bar) 

• Used in high-pressure manifolds, accumulator systems, and main transmission lines

• Compatible with KMT, Flow, AccuStream, H2O Jet, OMAX, BFT, WSI, and other standard waterjet systems 

Features:

• 2-Way Straight Configuration: Provides inline on/off flow control without changing flow direction

• 3/8 Inch Connection Size: Industry-standard size for medium-to-high flow waterjet plumbing 

• 60,000 PSI Pressure Rating: Engineered for continuous operation at 4,137 bar 

• Stainless Steel Construction: Provides excellent corrosion resistance and structural integrity under extreme pressure cycling 

• Precision-Machined Sealing Surfaces: Ensures leak-tight shut-off and smooth valve operation

• Standard Cone-and-Thread Connections: Compatible with standard 3/8" HP fittings, gland nuts, and coned inserts

• Direct OEM Replacement: Interchangeable with major waterjet brands 

Maintenance:

Failure Diagnosis (When to Replace):

• External Water Leakage: Visible water weeping from the valve body or stem indicates seal failure, requiring immediate valve replacement 

• Thread Damage: Stripped, galled, or corroded thread ports prevent proper tightening and will cause high-pressure leaks

• Cone Seat Damage: Nicks, galling, or pitting on the 60-degree cone sealing surfaces will compromise the seal

• Stem Seal Failure: If the valve leaks from the stem area during operation, internal stem seals have failed

• Difficult Operation: If the valve handle requires excessive force or feels gritty when turning, internal components may be damaged

• Cracked or Deformed Body: Any visible cracking or distortion of the stainless steel valve body warrants immediate replacement

• Scheduled Preventive Maintenance: Develop a routine for leak-checking high-pressure fittings and valves at the beginning of each shift; repair any leaks as soon as they are discovered 

Inspection and Replacement 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. Never service a pressurized HP line 

• Leak Detection: Leaks not visible to the naked eye can often be discovered by feeling the temperature of components — if a connection feels warmer than normal, internal leakage may be occurring 

• Port Inspection: Before installation, thoroughly inspect both port threads and cone seats for nicks, galling, or deformation. Examine the valve body for cracks or corrosion

• Component Replacement Practice: When disassembling a high-pressure joint, it is standard practice to replace the cone, gland, and collar if they show signs of wear

• Lubrication: Apply a thin, even layer of high-pressure anti-seize lubricant (e.g., "Silver Grade" or "Blue Goop") to the male threads of the mating gland nuts only. Do not apply lubricant to the cone sealing surfaces 

• Two-Wrench Method (Critical): When tightening or loosening connections, use two appropriately sized wrenches—one to counter-hold the valve body and one to tighten the gland nut—to prevent twisting stress on the assembly

• Torque Compliance: Tighten all connections to the specific torque values listed in the equipment service manual for 3/8" HP connections using a calibrated torque wrench

• Clean Area Maintenance: Perform valve rebuilds in a designated clean area to prevent contamination of replacement parts with abrasive particles; wear disposable gloves to prevent natural oils from being introduced to seal materials 

• Replace if Damaged: Replace the valve immediately if threads are damaged, cone seats are pitted or deformed, cracks are visible, stem seals are leaking, or persistent leakage occurs despite correct installation

• Storage: Store spare valves in a clean, dry environment to protect precision threads and sealing surfaces from damage before use

Cross-Reference Information:

• OEM Part Number: 10078863

• Table 12-54: High Pressure Fitting and Valve Assemblies (Item 2) 

• Flow #: A-0788-3 

• AccuStream #: 1-13166-60-6 

• KMT #: 10078863, 49864382 

• H2O Jet #: 400072-2-2 

• WSI #: FT60VM6071, FT60VM6071T 

• Other #: NVT6H1VM60, 7500019 

• Weight: 0.5 kg (1.1 lbs) 

• Pressure Rating: 60,000 PSI (4,137 bar) 

• Connection Size: 3/8 inch 

• Material: Stainless Steel