Rotary Unions LT Series

LT Series 4-Passage Rotary Unions & Joints

LT Series 4-Passage Rotary Unions & Joints
Maximum Pressure See Other Pressure Options
Maximum Speed See Other Speed Options
Connection Type See Other Connection Options
Suitable Media See Other Media Options

The 4-passage LT Series rotary unions are designed for air, gas and vacuum use and are ideal for a number of automation and robotic applications. These lightweight, compact rotary unions feature an all-aluminum construction and four independent flow passages capable of transferring different types of media simultaneously.

LT 4-passage models come standard with threaded connections on the sides of the shaft and housing. Models are also available with optional shaft O-ring face seal glands for flush mounting the union to an interface (must be specified when ordering).

Need to combine fluid with electrical power, signal and/or data transfer? No problem. The LT Series rotary unions are designed to integrate directly with our standard electrical slip rings. See options.

Available Configurations

Part # Connection Passage Size Diameter Length Through Bore Min. Torque* Part Downloads Information
LT-2141 [LTM-2141]1/8"-27 NPT [Rc1/8"-28 BSPT]0.156" [3.962 mm]2.187" [55.55 mm]3.314" [84.176 mm]0.375" [9.525 mm]4 in-lbs [0.45 Nm] Get Quote
LT-2341 [LTM-2341]3/8"-18 NPT [Rc3/8"-19 BSPT]0.375" [9.525 mm]3.437" [87.3 mm]6.284" [159.614 mm]0.375" [9.525 mm]12 in-lbs [1.36 Nm] Get Quote

*Minimum torque required to rotate based on zero pressure.

Technical Specifications

Maximum Pressure 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
Connection Type NPT, BSPT
LT Series Rotary Unions - Housing Material
Housing: Material (Plating/Coating) Aluminum (Blue Anodization)
LT Series Rotary Unions - Shaft Material
Shaft: Material (Plating/Coating) Aluminum (Electroless Nickel)
LT Series Rotary Unions - Shaft Flange Mount
Optional Interface Mounting Shaft Flange Mount
LT Series Rotary Unions - Housing Flange Mount
Optional Interface Mounting Housing Flange Mount
Shaft Connection Options Side & O-ring Face Seal Glands
  • 1Standard Threaded Side Connections (Plugged if O-ring Face Seal Gland Option is Specified)
  • 2Optional, Non-threaded O-ring Face Seal Glands for Flush Mounting (Must Be Specified When Ordered)
  • 3Threaded, Interface Mounting Holes
  • 4Machining Holes (Always Plugged)

All values listed under Technical Specifications are dependent on a combination of all application parameters. Please note operational life is dependent upon both rotational speed and duty cycle. Contact DSTI if your application requires operating close to the maximum rotational speed with a continuous duty cycle. Applications with temperatures above 220° F (105° C) require alternative seal materials. Please consult with DSTI regarding your specific application requirements.

Available Options

Available Custom Modifications for LT Series Rotary Unions

Custom Modifications

Easier and less expensive than you may think. We can modify our standard products to fit your project requirements.

Learn More
Electrical Slip Rings for LT Series Rotary Unions

Electrical Slip Ring Integration

Get the complete package. We offer a wide range of electrical slip rings designed to directly integrate with our LT Series rotary unions.

View Options

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