Product Name: High-Pressure Straight Coupling (Part No. 400011-1)

Description:
The HP Straight Coupling 400011-1 is a precision-machined, high-strength stainless steel fitting designed for 60,000 PSI (approximately 4,137 bar) waterjet cutting systems . This inline adapter serves as a critical connector within the ultra-high pressure (UHP) fluid path, joining two sections of high-pressure tubing or directly linking components such as intensifier pumps, on/off valves, and cutting head assemblies .

Engineered for leak-free performance under extreme pressure cycling, this straight coupling utilizes a cone-and-thread (cone & thread) metal-to-metal sealing design . This geometry creates a robust seal that withstands vibration and hydraulic shock while allowing for multiple reassemblies. The coupling is available in industry-standard connection sizes (such as 1/4", 3/8", or 9/16"), with the specific configuration of part 400011-1 corresponding to a 1/4" HP fitting as listed in manufacturer specifications .

Applications:

• Joining high-pressure tubing lines within the waterjet intensifier pump assembly

• Connecting HP tubing to on/off valves, check valves, or cutting head inlet ports 

• Creating custom-length high-pressure fluid paths by linking standard tube sections

• Compatible with H2O Jet, KMT, AccuStream, WSI, FLOW, and OMAX waterjet systems 

Features:

• High-Strength Stainless Steel Construction: Machined from corrosion-resistant stainless steel to withstand extreme pressure cycling (60,000+ PSI / 4,137 bar) 

• Metal-to-Metal Sealing: Precision-machined 60-degree cone seat design ensures a reliable, leak-free seal that can be reassembled multiple times 

• Bidirectional Flow: Symmetrical design allows for installation in either orientation, simplifying assembly

• Flow-Optimized Geometry: Internal design ensures minimal pressure drop and turbulence 

• Direct OEM Replacement: Interchangeable with standard part numbers including H2OJET 400011-1, AccuStream 1-13160-60, A-0780-2, and 10078905 

Maintenance:

Inspection Before Installation:

• Visually inspect the coupling body, threads, and internal cone sealing surfaces for any nicks, galling, corrosion, or cracks .

• Damaged sealing surfaces will compromise the high-pressure seal; replace the coupling immediately if any defects are found.

Installation Best Practices:

• Full Depressurization (Critical): Before any installation or removal, ensure the waterjet system is completely depressurized and locked out (hydraulic, high-pressure water, and air supply). Never loosen a pressurized fitting .

• Lubrication: Apply a thin, even layer of high-pressure anti-seize compound (e.g., "Silver Grade" or "Blue Goop") to the male threads of the gland nut only. Do not apply lubricant to the cone sealing surfaces, as this can prevent the proper metal-to-metal seal .

• Torque Compliance: Tighten the coupling to the specific torque value listed in your equipment service manual. Use two wrenches (one to counter-hold the coupling body) to prevent twisting stress on the assembly.

• Proper Seating: Ensure the HP tubing is fully bottomed out in the coupling and the cone is correctly aligned before applying final torque.

Reusability & Replacement:

• With proper care, the coupling can be reused across multiple maintenance cycles if the metal threads and cone seats remain in perfect condition.

• Replace the coupling immediately if threads show signs of stripping, galling, or corrosion, or if the body exhibits any cracks.