1/4" Stainless Steel Tube Union – Sanitary Compression Fitting
The SU-4 tube union is a 1/4" stainless steel compression fitting designed for high-purity applications in hygienic fluid processors, sanitary, and industrial systems. Made from 316 stainless steel, this sanitary stainless steel fitting uses corrosion-resistant alloys to provide a secure, leak-tight connection, supporting clean in place instrumentation, hygienic valves, and precise fluid control.
- Material: 316 Stainless Steel (Corrosion-Resistant Alloy)
- Connection Type: 1/4" Tube OD x 1/4" Tube OD
- Applications: Sanitary tubing, CIP systems, hygienic valves, lab skids, OEM fluid panels
This 1/4 union fitting—also referred to as a 1/4 union connector, Swagelok stainless steel union alternative (Swagelok equivalent: SS-400-6), or 1/4 tubing union—ensures precise fluid control in biotech, food and beverage, and pharmaceutical systems.
Its corrosion-resistant alloys resist corrosion and support frequent maintenance cycles, making it ideal for hygienic fluid processors. The SU-4 is a reliable choice for engineers specifying components for sanitary systems, offering easy installation and long-term integrity. Whether you’re building lab skids or upgrading industrial piping, this union delivers sanitary performance and durability.
| Inch/Metric | Inch |
|---|---|
| Tube Outside Diameter D | 1/4in, mm |
| Width Across Flats h | 1/2in |
| Dimension A | 15.24mm |
|---|---|
| Dimension B | 17.78mm |
| Dimension I | 26.16mm |
| Dimension L | 40.89mm |
| Dimension d [Min] | 4.82mm |
| Swagelok | 400-6 |
|---|