FS2403 ORFS Union | O-Ring Face Seal Hydraulic Union Fittings
Description
The FS2403 ORFS Union is a high-performance hydraulic fitting designed to connect two ORFS tube assemblies in a straight-through configuration. O-Ring Face Seal (ORFS) fittings provide superior leak prevention by sealing on the flat face of the fitting using an elastomeric O-ring, making them ideal for high-pressure systems and applications involving continuous mechanical shock or vibration.
ORFS Fitting Design
“O” Ring Face Seal (ORFS) fittings consist of:
- Bodies – Provide structural strength and alignment
- O-Rings – Create a positive, leak-free face seal
- Nuts – Secure the assembly during installation
- Sleeves – Support the tube and maintain proper sealing
This design minimizes leakage and performs exceptionally well in systems exposed to vibration and mechanical shock.
Applications
FS2403 ORFS Unions are commonly used in:
- High-pressure hydraulic systems
- Applications with continuous mechanical shock
- Industrial hydraulic circuits
- Mobile and construction equipment
- Heavy-duty fluid power systems
Pressure Ratings
- Working pressure: Up to 6,000 PSI
- Pressure capability depends on:
- Tube size
- Fitting size
- Application conditions
Suitable for extreme-pressure applications, including systems operating at or above 5,000 PSI
Material Specifications
Fitting Body
-
Steel:
- 12L14
- 1045
O-Ring Materials
- Buna-N (90 Durometer) – Standard
- Viton – Available upon request for high-temperature applications
Plating & Surface Finish
- Clear Zinc Trivalent plating
- Provides enhanced corrosion resistance
- Suitable for industrial and outdoor hydraulic environments
Temperature Range
-
Standard operating range:
- -30°F to 275°F
Viton O-rings available upon request for applications requiring higher temperature resistance
Key Features & Benefits
- O-ring face seal design for leak-free performance
- Excellent resistance to vibration and mechanical shock
- Suitable for very high-pressure hydraulic systems
- Durable steel construction
- Interchangeable with standard ORFS components
- Reliable sealing over a wide temperature range
Typical Use Cases
- Hydraulic tube assemblies
- Manifolds and hydraulic blocks
- Mobile hydraulic equipment
- Industrial machinery requiring zero-leak connections
- High-pressure fluid transfer systems
ORFS fittings consist of four primary components, body, O-ring, nut, and sleeve, working together to ensure reliable sealing and long service life in demanding hydraulic environments.