DELPHI FITTINGS
Part Number: FS2403
SAE ORFS Tube Union
Product Overview
The Delphi Fittings Part FS2403 is an SAE O-Ring Face Seal (ORFS) Tube Union. This straight connector is designed to join two female ORFS swivel fittings or tube ends that have been specially prepared with a flat face sealing surface (e.g., via flanging or brazing a sleeve). It features male ORFS flat face ends on both sides, each with an O-ring groove for accommodating the sealing O-ring. The ORFS connection provides a highly reliable, leak-free seal suitable for high-pressure hydraulic applications and systems prone to vibration or thermal cycling. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the FS2403 union is built to SAE J1453 / ISO 8434-3 standards.
Key Features & Specifications
| Material | High-Grade Carbon Steel |
|---|---|
| End 1 Configuration | Male SAE O-Ring Face Seal (ORFS) (conforming to SAE J1453 / ISO 8434-3) |
| End 2 Configuration | Male SAE O-Ring Face Seal (ORFS) (conforming to SAE J1453 / ISO 8434-3) |
| Body Style | Straight Union/Connector, typically with a central hexagonal (hex) section or flats for secure wrench engagement. |
| Sealing Mechanism | Both ends utilize an elastomeric O-ring (seated in the groove on each male ORFS face) which compresses against the flat face of the mating female ORFS swivel fitting or prepared tube end. This creates a highly effective, static face seal. |
| Corrosion Protection | Standard Zinc Plating for enhanced durability and resistance to environmental corrosion. |
| Primary Function | To provide a straight, high-integrity, and leak-proof connection between two female ORFS swivel fittings or specially prepared tube ends of the same size. |
| Working Pressure | Suitable for high-pressure hydraulic systems, often rated up to 6000 PSI or higher depending on size and application. |
| O-Ring Material (for both ORFS ends) | Typically Buna-N (Nitrile) 90 Durometer as standard. Viton® (FKM) or other materials available upon request for specific fluid or temperature compatibility. O-rings are supplied with the fitting. |
Commonly Available Sizes (Part #FS2403 Series)
Delphi Fittings offers the FS2403 SAE ORFS Tube Union in a comprehensive range of common ORFS sizes. Both male ORFS ends are of the same size to connect corresponding female ORFS swivel fittings or prepared tube ends.
Examples include (Male ORFS x Male ORFS):
- FS2403-04: For 1/4" (-04) ORFS connections (9/16-18 UNF Thread)
- FS2403-06: For 3/8" (-06) ORFS connections (11/16-16 UNF Thread)
- FS2403-08: For 1/2" (-08) ORFS connections (13/16-16 UNF Thread)
- FS2403-10: For 5/8" (-10) ORFS connections (1-14 UNS Thread)
- FS2403-12: For 3/4" (-12) ORFS connections (1-3/16-12 UN Thread)
- FS2403-16: For 1" (-16) ORFS connections (1-7/16-12 UN Thread)
- FS2403-20: For 1-1/4" (-20) ORFS connections (1-11/16-12 UN Thread)
- FS2403-24: For 1-1/2" (-24) ORFS connections (2-12 UN Thread)
Note: Each ORFS male end includes an appropriate O-ring. For unlisted sizes, specific material requirements (e.g., stainless steel options), or other custom needs, please contact our sales team.
Applications
The Part FS2403 SAE ORFS Tube Union is essential for:
- Joining two hydraulic hoses or tubes that are terminated with female ORFS swivel fittings.
- Connecting sections of hydraulic lines where a reliable, leak-free, and high-pressure straight connection is required.
- Use in mobile equipment (construction, agriculture, mining), industrial machinery, and other demanding hydraulic systems where ORFS fittings are specified for their superior sealing performance and resistance to vibration.
- Applications requiring "zero clearance" assembly or disassembly, as the ORFS design allows for easy removal and installation without disturbing adjacent lines.
- Repairing or extending existing ORFS hydraulic lines.
Installation & Usage Guidelines
- Thoroughly inspect the O-ring grooves and flat sealing faces on both male ends of the FS2403 union, as well as the flat faces and O-rings of the mating female ORFS swivel fittings or prepared tube ends. Ensure all surfaces are meticulously clean, undamaged, and free from any contaminants or debris.
- Verify that the O-rings supplied with (or intended for) the FS2403 union are of the correct size and material (e.g., Buna-N, Viton®) for the specific application's fluid, temperature, and pressure.
- Correctly install a lubricated O-ring into the groove on each male ORFS face of the union. Ensure the O-rings are properly seated and not twisted.
- Align the union with the two female ORFS swivel fittings or prepared tube ends that are to be connected.
- Hand-tighten both female ORFS swivel nuts onto the respective male ends of the union until the flat faces make contact with the O-rings.
- Use appropriately sized wrenches. While holding the central hex or flats of the FS2403 union body stationary with a backup wrench, tighten each female ORFS swivel nut to the manufacturer's recommended torque value or by using the "Flats From Wrench Resistance" (FFWR) method if specified. Proper torque is critical for correct O-ring compression and a reliable seal.
- After assembly and system pressurization, carefully inspect both connections for any signs of leakage.
Why Choose Delphi Fittings Part FS2403?
- Superior Leak Prevention: The O-Ring Face Seal design provides an exceptionally reliable, virtually leak-free connection, ideal for high-pressure and high-vibration hydraulic applications.
- Zero Clearance Assembly: Allows for easy installation and removal of the union or connected components without needing to significantly displace adjacent lines, simplifying maintenance in tight spaces.
- High-Pressure Capability: Engineered to withstand the demanding pressures commonly encountered in modern hydraulic systems.
- Excellent Reusability: The metal faces generally do not wear, and the seal relies on a replaceable O-ring, allowing for multiple disconnections and reconnections with high reliability.
- Durable Carbon Steel Construction: Manufactured from high-grade carbon steel for excellent strength and longevity in typical industrial and mobile hydraulic environments.
- Enhanced Corrosion Resistance: Standard zinc plating provides robust protection against rust and other environmental corrosive factors.
- Full Adherence to Industry Standards: Meets SAE J1453 / ISO 8434-3 specifications, ensuring compatibility and interchangeability with other standard ORFS components.
- Quality-Assured Manufacturing: Produced under Delphi Fittings' rigorous ISO 9001:2015 certified quality management system.
Get a Quote for Part FS2403 - SAE ORFS Tube Union
For highly reliable, leak-free straight connections between two female ORFS fittings or prepared tube ends, the Part FS2403 Tube Union is an industry-leading choice. Contact Delphi Fittings today for competitive wholesale pricing, bulk order information, and expert technical support for your hydraulic fitting needs.
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