Vacuum rotary union LT Series

for airfor gas24-passage

Overview
The LT Series 24‑passage rotary unions are engineered for air, gas and vacuum applications in automation and robotics. These compact, lightweight units feature an all‑aluminum construction with 24 independent flow passages enabling simultaneous transfer of different media. Standard models include threaded side connections on the shaft and housing; optional shaft O‑ring face seal glands allow flush mounting (specify at order). LT Series units are compatible for direct integration with standard electrical slip rings for combined fluid and electrical transfer.

Key Product Attributes

• Construction: All‑aluminum housing and shaft
• Passages: 24 independent flow passages
• Standard connections: Threaded side connections on shaft and housing (NPT/BSPT typical)
• Optional shaft mounting: O‑ring face seal glands for flush mounting (specify when ordering)
• Electrical integration: Designed for integration with electrical slip rings

Maximum Pressure — Series Table
Max. Pressure | Series
200 PSI [15 BAR] — SPS, LT, SE, GP, GPS, SCS, HVH, HPS
600 PSI [40 BAR] — SPS, LT, SE, GP, GPS, HVH, HPS
5,000 PSI [345 BAR] — SE, GP, GPS, HVH, HPS
7,500 PSI [515 BAR] — SE, GP, GPS, HPS
20,000 PSI [1,375 BAR] — HPS
Other — Custom solutions available

Maximum Speed — Series Table
Max. Speed | Series
20 RPM — SPS, LT, SE, GP, GPS, SCS, HVH, HPS
50 RPM — SPS, LT, SE, GP, GPS, SCS, HPS
75 RPM — SPS, LT, SE, GP, GPS, SCS
300 RPM — SPS, LT, SE, GP, GPS, SCS
500 RPM — SPS, LT, GP, GPS, SCS
Other — Custom solutions available

Connection Types — Series Table
Connection Type | Series
ASME‑BPE — SCS
BSPP — SE, GP
BSPT — LT
NPT — SPS, LT, GP, GPS
SAE‑ORB — SE, HVH
Medium Pressure — HPS
Other — Custom solutions available

Suitable Media — Series Table
Suitable Media | Series
Air/Gas — SPS, LT, SE, GP, GPS, SCS, HVH, HPS
Chemical — GPS, SCS, HPS
Coolant — SE, GP, GPS, SCS, HPS
DI/Tap Water — GPS, SCS, HPS
Food‑Grade — SCS
Oil/Hydraulic — SE, GP, GPS, SCS, HVH, HPS
Steam — Custom solutions
Water/Glycol — SE, GP, GPS, SCS, HPS
Other — Custom solutions available

Configurations (example model entry)
Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque* | Part Downloads
LT‑21241 [LTM‑21241] | 1/8"‑27 NPT [Rc1/8"‑28 BSPT] | 0.156" [3.962 mm] | 3.438" [87.325 mm] | 13.950" [354.331 mm] | 0.375" [9.525 mm] | 18 in‑lbs [2.03 Nm] | Downloads available (catalog, installation/mounting, model drawing, DWG, STEP)

Notes from Configuration Table
*Minimum torque shown to rotate at zero pressure using Oil/Hydraulic (or Air/Gas for SPS). Torque may increase with other media or dry running; consult manufacturer for specific torque requirements when ordering.

Pressure / Performance Charts
Pressure vs. Torque and Pressure vs. Speed data are provided for LT Series models; chart files available with product documentation.

Options & Customization

• Optional shaft O‑ring face seal glands for flush mounting (specify at order)
• Shaft flange mount and housing flange mount options available
• Optional integration with a range of electrical slip rings for combined fluid and electrical/data transfer
• Custom modifications to adapt standard products to project requirements

Important Application Notes

• The LT Series 24‑passage model is primarily intended for air, gas and vacuum; liquid media are not recommended for this series (select a different series or consult for liquid applications).
• All technical values depend on application parameters; operational life depends on rotational speed and duty cycle.
• Temperatures above 220°F (105°C) require alternative seal materials; water above 212°F (100°C) also requires alternative seals.

Technical Specifications

• Series: LT Series
• Number of passages: 24 independent flow passages
• Housing material & finish: Aluminum (Blue Anodization)
• Shaft material & finish: Aluminum (Electroless Nickel)
• Maximum pressure (typical LT model): 600 PSI [40 BAR]
• Maximum speed (typical LT model): 500 RPM
• Maximum vacuum: 30 HG
• Temperature range: 0°F to 220°F [-18°C to 105°C]
• Standard connection types: NPT (standard), BSPT; other connections available per series
• Connection orientation: Threaded side connections on shaft and housing (plugged if O‑ring face seal glands specified)
• Shaft connection options: Side threaded connections, optional non‑threaded O‑ring face seal glands, threaded interface mounting holes, machining holes (plugged)
• Suitable media (recommended): Air/Gas (liquid media not recommended for LT Series)