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The Union Cross (Fractional Tube) is a high-precision instrumentation fitting designed to provide a secure, leak-proof four-way intersection for fractional-sized tubing. It features a precision-engineered double-ferrule compression system on all four ports, which ensures a vibration-resistant, torque-free seal capable of maintaining high-pressure and vacuum integrity across the entire junction. This symmetrical design allows for the efficient distribution or mixing of fluids and gases within a system while maintaining a compact footprint. Typically manufactured from 316 stainless steel for maximum corrosion resistance and durability, these union crosses are essential in complex fluid systems, analytical instrumentation, and industrial process lines where professional, multi-directional routing and reliable connection stability are required.
| UNION CROSS | ||||||
|---|---|---|---|---|---|---|
| Fractional Tube | Dimensions in (mm) | |||||
| T-Tube O.D. (in.) | Basic Ordering Number | L | C | G | F | E |
| 1/8 | VUC-SS-2 | 0.88(22.4) | 0.50(12.7) | 0.44(11.1) | 0.37(9.5) | 0.09(2.3) |
| 3/16 | VUC-SS-3 | 0.96(24.4) | 0.54(13.7) | 0.50(12.7) | 0.44(11.1) | 0.12(3.0) |
| 1/4 | VUC-SS-4 | 1.06(26.9) | 0.60(15.2) | 0.56(14.3) | 0.50(12.7) | 0.19(4.8) |
| 5/16 | VUC-SS-5 | 1.17(29.7) | 0.64(16.2) | 0.63(15.9) | 0.63(15.9) | 0.25(6.4) |
| 3/8 | VUC-SS-6 | 1.20(30.5) | 0.66(16.8) | 0.69(17.5) | 0.63(15.9) | 0.28(7.1) |
| 1/2 | VUC-SS-8 | 1.42(36.1) | 0.90(22.9) | 0.87(22.2) | 0.81(20.6) | 0.41(10.4) |
| 5/8 | VUC-SS-10 | 1.53(38.8) | 0.96(24.4) | 1.00(25.4) | 1.0(25.4) | 0.50(12.7) |
| 3/4 | VUC-SS-12 | 1.57(39.9) | 0.96(24.4) | 1.13(28.6) | 1.06(27.0) | 0.62(15.7) |
| 7/8 | VUC-SS-14 | 1.76(44.7) | 1.02(25.9) | 1.25(31.8) | 1.37(34.9) | 0.72(18.3) |
| 1 | VUC-SS-16 | 1.93(49.0) | 1.23(31.2) | 1.50(38.1) | 1.37(34.9) | 0.88(22.4) |