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Rotary Unions are also referred to as:
- Rotating Unions
- Rotating Joints
- Rotating Couplings
- Rotating Swivels
- Hydraulic Swivels
- Rotary Joints
- Rotary Couplings
- Hydraulic Couplings
- Rotary Swivels
- Swivel Joints
- Fluid Swivels
- Swivel Unions
LT Series Rotary Unions
The LT Series rotary unions / rotating joints are small and lightweight available in 2, 4, 8, 12 & 24 passage versions. The LT Series rotary unions / rotating joints feature all-aluminum construction and low-torque seals that are suitable for pressure or vacuum use.
| part # | # of passages | thru bore | overall diameter | overall length | min torque* | passage size | slip ring option | link |
|---|---|---|---|---|---|---|---|---|
| LT-2121 | 2 | 0.375 | 2.187 | 2.596 | 3 | 0.156 | View | |
| LT-2321 | 2 | 0.375 | 3.437 | 4.624 | 8 | 0.375 | View | |
| LT-2141 | 4 | 0.375 | 2.187 | 3.314 | 4 | 0.156 | View | |
| LT-2341 | 4 | 0.375 | 3.437 | 6.284 | 12 | 0.375 | View | |
| LT-2181 | 8 | 0.375 | 2.187 | 4.746 | 5 | 0.156 | View | |
| LT-2381 | 8 | 0.440 | 3.437 | 9.610 | 18 | 0.375 | View | |
| LT-21121 | 12 | 0.375 | 2.187 | 6.806 | 8 | 0.156 | View | |
| LT-23121 | 12 | 0.440 | 4.438 | 14.070 | 32 | 0.375 | View | |
| LT-21241 | 24 | 0.375 | 3.438 | 13.950 | 20 | 0.156 | View |
All dimensions are shown in inches.
*This is the minimum torque required to rotate based on zero pressure measured in inch-pounds
| Max. Pressure¹ | 600 PSI (40 BAR) |
| Max. Vacuum¹ | 30 HG |
| Max. Rotational Speed¹ | up to 500 RPM |
| Max. Temperature¹ | 350° F (176° C)² |
¹Values are dependent on application parameters. Please consult with DSTI.
²High temperature applications may require alternative seal materials. Please consult with DSTI.
| Connection Sizes | 1/8" & 3/8" NPT. Other sizes available upon request. |
| Plating and Coatings | Shaft: E-Nickel Housing: Blue Anodize |
| Mounting Options | Tapped holes are provided on both the housing and shaft for mounting the assembly. |
| Mounting Options | Available Aluminum flange can be bolted onto the end of the housing assembly for optional electrical slip ring mounting. The flange can also be bolted to the shaft end for additional mounting configurations. To request this option add -F to end of product part number. |
| Slip Ring Options | The LT Series unions are available with a number of RotaRing™ slip ring options for power, signal and data transfer. The assembly is available with an aluminum cover to protect the slip ring during use in demanding environments. |
| O-ring Face Seal Options | O-ring face seal options available for all LT Series models. Please add "-OF" to the part number. Example: LT-2121-OF |
Note: O-ring face seal options are available for face-mounting a LT Series rotary union. Please add "-OF" to the part number --- Example: LT-2121-OF. For questions, please consult DSTI.
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