Vacuum rotary union LT Series

for gasfor air8-passage

Overview
The 8-passage LT Series rotary unions are designed for air, gas and vacuum use and are ideal for automation and robotic applications. These lightweight, compact rotary unions feature an all-aluminum construction and eight independent flow passages capable of transferring different media simultaneously. LT 8-passage models come standard with threaded side connections on the shaft and housing and are available with optional shaft O-ring face seal glands for flush mounting.

Key Features

• All-aluminum construction (anodized housing)
• Eight independent flow passages for simultaneous transfer of different media
• Standard threaded side connections on shaft and housing
• Optional O-ring face seal glands for flush mounting (must be specified when ordering)
• Integrates directly with standard electrical slip rings for combined fluid and electrical transfer
• Optional interface mounting: shaft flange mount and housing flange mount

Configurations (selected models)
Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque
LT-2181 [LTM-2181] | 1/8"-27 NPT [Rc1/8"-28 BSPT] | 0.156" [3.962 mm] | 2.187" [55.55 mm] | 4.746" [120.549 mm] | 0.375" [9.525 mm] | 5 in-lbs [0.56 Nm]
LT-2381 [LTM-2381] | 3/8"-18 NPT [Rc3/8"-19 BSPT] | 0.375" [9.525 mm] | 3.437" [87.3 mm] | 9.610" [244.094 mm] | 0.440" [11.176 mm] | 18 in-lbs [2.03 Nm]

Options & Integration

• Shaft connection options: standard threaded side connections; optional non-threaded O-ring face seal glands for flush mounting; threaded interface mounting holes; machining holes (plugged).
• Optional interface mounting: Shaft flange mount and Housing flange mount.
• Electrical slip ring integration available to combine fluid transfer with electrical power, signal and/or data transfer.

Technical Notes

• Suitable media: Air/Gas (primary). The use of liquid media is not recommended for this product; select an alternative DSTI product line if liquid media is required.
• Maximum vacuum rating and temperature considerations affect seal selection and operational life.
• Minimum torque values listed are based on zero pressure with Oil/Hydraulic media (or Air/Gas media for SPS Series). Required torque may be greater when using other media types or dry running.

Technical Specifications

• Maximum Pressure: 600 PSI [40 BAR]
• Maximum Speed: 500 RPM
• Maximum Vacuum: 30 in Hg
• Temperature Range: 0° F to 220° F [-18° C to 105° C]
• Connection Types (typical): NPT, BSPT
• Suitable Media: Air / Gas (primary). Liquid media not recommended for this product.
• Housing Material / Finish: Aluminum (Blue Anodization)
• Shaft Material / Finish: Aluminum (Electroless Nickel)
• Shaft Connection Options: Side threaded connections (standard), optional O-ring face seal glands for flush mounting, threaded interface mounting holes, machining holes (plugged)
• Typical applications: automation, robotics and other rotating systems requiring multiple independent fluid passages