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The Tube Cap (Fractional Tube) is a critical instrumentation fitting designed to provide a secure, pressure-tight seal at the end of a fractional-sized tube run. It features a precision-machined nut and a high-performance double-ferrule compression system that grips the tube to create a leak-proof closure capable of withstanding high-pressure and vacuum conditions. Unlike a plug, which seals a fitting port, the cap is installed directly onto the tubing itself to safely terminate a line or protect it during system maintenance and pressure testing. Typically manufactured from 316 stainless steel for maximum corrosion resistance and durability, these caps are essential in industrial fluid systems, chemical processing, and laboratory setups where the reliable isolation of fluid or gas lines is required.
| TUBE CAP | |||||
|---|---|---|---|---|---|
| Fractional Tube | Dimensions in (mm) | ||||
| T-Tube O.D. (in.) | Basic Ordering Number | L | C | G | F |
| 1/16 | VTC-SS-1 | 0.59(15.0) | 0.34(8.6) | 0.31(7.9) | 0.31(7.9) |
| 1/8 | VTC-SS-2 | 0.79(20.1) | 0.50(12.7) | 0.44(11.1) | 0.44(11.1) |
| 3/16 | VTC-SS-3 | 0.84(21.3) | 0.54(13.7) | 0.50(12.7) | 0.44(11.1) |
| 1/4 | VTC-SS-4 | 0.92(23.4) | 0.60(15.2) | 0.56(14.3) | 0.50(12.7) |
| 5/16 | VTC-SS-5 | 0.96(24.4) | 0.64(16.3) | 0.63(15.9) | 0.56(14.3) |
| 3/8 | VTC-SS-6 | 1.01(25.7) | 0.66(16.8) | 0.69(17.5) | 0.63(15.9) |
| 1/2 | VTC-SS-8 | 1.15(29.2) | 0.90(22.9) | 0.87(22.2) | 0.81(20.6) |
| 5/8 | VTC-SS-10 | 1.18(30.0) | 0.96(24.4) | 1.00(25.4) | 0.94(23.8) |
| 3/4 | VTC-SS-12 | 1.24(31.5) | 0.96(24.4) | 1.13(28.6) | 1.06(27.0) |
| 7/8 | VTC-SS-14 | 1.34(34.0) | 1.02(25.9) | 1.25(31.8) | 1.19(30.2) |
| 1 | VTC-SS-16 | 1.51(38.4) | 1.23(31.2) | 1.50(38.1) | 1.37(34.9) |
| 1 1/8 | VTC-SS-18 | 1.51(38.4) | 1.44(36.7) | 1.75(44.5) | 1.63(41.3) |
| 1 1/4 | VTC-SS-20 | 2.10(53.3) | 1.62(41.1) | 1.87(47.6) | 1.75(44.5) |
| 1 1/2 | VTC-SS-24 | 2.54(64.5) | 1.97(50.0) | 2.25(57.2) | 2.13(54.0) |