Product Name: High-Pressure Cross Fitting (3/8″) – Part No. 10078038

Description:
This component is a high-pressure cross fitting, a four-way hydraulic connector specifically designed for waterjet cutting systems. It features 3/8 inch high-pressure connection ports on all four ends, creating a cruciform junction that allows a single high-pressure water line to be split into three separate outlet paths or to serve as a central distribution hub for intensifier manifolds and cutting head plumbing .

The cross fitting is precision-machined from high-strength stainless steel (304/316) and features industry-standard 60-degree cone sealing surfaces for reliable metal-to-metal sealing . This design provides a blowout-proof, vibration-resistant seal capable of withstanding the extreme pressure cycling inherent in waterjet operation. The fitting is rated for continuous operation at 60,000–100,000 PSI (approximately 4,137–6,894 bar) .

Cross fittings are commonly used in intensifier pump assemblies to distribute high-pressure water to multiple intensifier cylinders, in accumulator systems for pressure smoothing, and in manifold blocks for routing water to multiple cutting heads . The symmetrical four-port design offers versatile plumbing configurations and is compatible with standard 3/8″ high-pressure tubing, gland nuts, and coned inserts.

Applications:

• Serves as a central distribution hub for high-pressure water in intensifier pump manifolds and accumulator assemblies 

• Splits a single high-pressure water supply line to feed multiple cutting heads or system branches

• Creates a four-way junction for high-pressure instrumentation, gauge ports, or bleed-down circuits

• Used in complex hydraulic layouts requiring multidirectional flow distribution 

• Suitable for 60,000-100,000 PSI (approximately 4,137-6,894 bar) ultra-high pressure waterjet systems

• Compatible with KMT, FLOW, BFT, WSI, APW, and other standard waterjet systems 

Features:

• 4-Way (Cross) Configuration: Four 3/8″ high-pressure ports for versatile fluid branching and distribution 

• High-Pressure Rating: Engineered for continuous operation at 60,000–100,000 PSI (4,137–6,894 bar)

• Stainless Steel Construction: Precision-machined from seamless 304/316 stainless steel for exceptional strength, corrosion resistance, and fatigue durability 

• 60-Degree Cone Sealing Surfaces: Precision-machined cone seats guarantee reliable metal-to-metal sealing with standard HP fittings, gland nuts, and coned inserts 

• Leak-Free Design: Maintains seal integrity under pressure fluctuations and mechanical vibration

• Compact Junction Point: Efficiently routes pressure lines to manifolds, gauges, and other UHP components 

• Direct OEM Replacement: Interchangeable with industry-standard 3/8″ cross fittings for major waterjet systems 

Maintenance:

Failure Diagnosis:

• External Water Leakage: Visible water weeping from any of the four ports or the fitting body indicates a failed cone seal, damaged threads, or improper torque. All high-pressure leaks must be repaired immediately 

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

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

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

• Internal Erosion: Over time, cavitation or contamination can erode internal passages, leading to pressure drop or turbulence

Inspection and Replacement Guidelines:

• Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, bleed down all high-pressure water and hydraulic lines, and follow lockout/tagout procedures. Never service a pressurized HP line 

• Port Inspection: Before installation, thoroughly inspect all four ports' threads and cone seats for nicks, galling, or deformation. Examine the fitting body for cracks or corrosion 

• Cone Seat Refurbishment: Inspect tubing cones and fitting cone seats for damage. Replace worn cones, glands, and collars whenever a high-pressure joint has been disturbed 

• Thread Cleaning: Clean all threads thoroughly with a soft brush and compatible solvent. Remove all debris, old sealant, and mineral deposits

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

• Torque Compliance (Critical): Use a calibrated torque wrench to tighten all four gland nuts to the torque values specified in the equipment service manual . Over-tightening can damage threads or cone seats; under-tightening will cause leaks

• Two-Wrench Method: Use two wrenches — one to counter-hold the cross body and one to tighten the gland nut — to prevent twisting stress on the assembly

• Proper Seating: Ensure HP tubing and coned inserts are fully seated in each port before applying final torque 

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

• Replacement Criteria: Replace the cross fitting immediately if threads are damaged, cone seats are pitted or deformed, cracks are visible, or persistent leakage occurs despite correct installation. Do not attempt to repair a cracked or severely eroded cross body

• Storage: Store spare cross fittings in a clean, dry environment to protect precision threads and cone sealing surfaces

Cross-Reference Information:

• OEM Part Number: 10078038

• Also known as: HP Cross, 4-Way Cross Fitting, High-Pressure Distribution Cross

• Connection Size: 3/8 inch HP

• Material: 304/316 Stainless Steel

• Pressure Rating: 60,000-100,000 PSI (4,137-6,894 bar) 

• Compatible with: KMT, FLOW, BFT, WSI, APW, and other standard waterjet systems 

• Reference Part Numbers: 049745-1 (87K) , 20452968