Vacuum rotary union LT Series

for airfor gas2-passage

Description
The LT Series 2-passage rotary unions are engineered for air, gas and vacuum service and are intended for automation and robotic applications requiring compact, lightweight fluid transfer. These unions feature an all-aluminum construction with two independent flow passages that allow simultaneous transfer of different media. Standard models include threaded side connections on the shaft and housing; optional shaft O-ring face seal glands are available for flush mounting (must be specified at order). LT Series units are compatible with standard electrical slip rings to permit combined fluid and electrical transfer.

Key Features

• Two independent flow passages enabling simultaneous transfer of different media
• Compact, lightweight design suitable for automation and robotic systems
• Aluminum housing with blue anodized finish
• Aluminum shaft with electroless nickel plating
• Standard threaded side connections; optional non-threaded O-ring face seal glands for flush mounting
• Designed to integrate with electrical slip rings for combined fluid/electrical interfaces

Configurations (examples)
Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque
LT-2121 [LTM-2121] | 1/8"-27 NPT [Rc1/8"-28 BSPT] | 0.156" [3.962 mm] | 2.187" [55.55 mm] | 2.596" [65.939 mm] | 0.375" [9.525 mm] | 3 in-lbs [0.34 Nm]
LT-2321 [LTM-2321] | 3/8"-18 NPT [Rc3/8"-19 BSPT] | 0.375" [9.525 mm] | 3.437" [87.3 mm] | 4.624" [117.45 mm] | 0.375" [9.525 mm] | 8 in-lbs [0.9 Nm]

Notes

• Minimum torque values are measured at zero pressure with oil/hydraulic media (or air/gas media for SPS Series). Torque required to rotate may increase with other media types or dry running.
• Operational life depends on rotational speed and duty cycle; continuous operation near maximum speed reduces service life.
• Applications with sustained temperatures above 220°F (105°C) or with water above 212°F (100°C) require alternative seal materials.

Technical specifications

• Series / Model: LT Series (2-passage)
• Maximum Pressure (standard for LT 2-passage models): 600 PSI [40 BAR]
• Maximum Speed: 500 RPM
• Maximum Vacuum: 30 HG
• Temperature Range: 0°F to 220°F [-18°C to 105°C]
• Suitable Media: Air / Gas (liquid media not recommended for this product line)
• Connection Types (typical): NPT and BSPT (side threaded connections standard)
• Housing Material & Finish: Aluminum (Blue Anodization)
• Shaft Material & Finish: Aluminum (Electroless Nickel)
• 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)
• Construction: All-aluminum, two independent flow passages
• Typical Applications: Automation, robotics, pneumatic and vacuum fluid transfer where compact 2-passage rotary unions are required
• Available Documentation: Product catalog and installation/mounting manual (see product downloads)