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UL 2 Flow Passage Rotary Unions

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Rotary Union Info

  • 2 Flow Passages
  • Lightweight, Compact Design
  • Low Torque Seals
  • Corrosion Resistance
  • NPT or BSPT Thread Connections
  • Customizable Options
Part #Overall LengthBody DiameterPassage SizeConnection TypeThru-boreSlip Ring OptionGet Quote
UL-21212.5962.1870.1561/8 NPT0.375Get Quote
UL-23214.6243.4370.3753/8 NPT0.375Get Quote

NOTE: All dimensions are shown in inches.

Electrical slip ring options available

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Plating and Coatings
Body Material Type: Aluminum, Shaft: E-Nickel, Housing: Red Anodize

Mounting
Tapped holes are provided on both the housing and shaft for mounting the assembly. 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.

Media Types
Air, Gas

Max. Pressure *
600 PSI (40 BAR)

Max. Vacuum *
30 HG

Max. Rotational Speed *
up to 500 RPM

Temperature Range *
0° F to 220° F (-18° C to 105° C)

Min. Torque Required *
UL-2121: 3 lbs-in
UL-2321: 8 lbs-in

* Values are dependent on a combination of all application parameters.

Temperatures outside of the recommended range may require alternative seal materials. Please consult with SRS.

Download UL Series Catalog
Part # PDF 2D Drawing (.pdf) DWG 2D Drawing (.dwg) STEP 3D CAD (.stp)
UL-2121PDFDWGSTP
UL-2321PDFDWGSTP

The UL Series rotary unions are available with a number of mounting flange and standard slip ring options (up to 56 circuits) for power, signal and data transfer. Slip ring assemblies are also available with protective aluminum covers for use in demanding environments and applications.

Please let us know your electrical requirements and we can make a recommendation for the best slip ring to integrate with your UL Series rotary union.

Electrical Slip Ring Information Needed:

  • Total Number of Circuits
  • Amperage Requirements per Circuit
  • Voltage Requirements per Circuit

Standard Electrical Slip Ring Options:

part # Circuits Amps/Circuit Voltage Lead Wire Length Capsule Length
ES6A¹ 6 2 120 48" 0.58"
ES6 6 2 240 48" 0.57"
ES12A¹ 12 2 120 48" 0.83"
ES12 12 2 240 48" 0.84"
ES18 18 2 240 48" 1.11"
ES24 24 2 240 48" 1.38"
ES36 36 2 240 48" 2.60"
ES56 56 2 240 48" 3.50"
ESM36 9 (3x) 10A (6x) 2A 240 48" 1.375"
ESM312 15 (3x) 5A (12x) 2A 240 48" 1.375"
ESM420 24 (4x) 10A (20x) 2A 240 48" 2.06"
ESM428 32 (4x) 5A (28x) 2A 240 48" 2.06"
ESM440 44 (4x) 10A (40x) 2A 240 48" 2.96"
ESM448 52 (4x) 5A (48x) 2A 240 48" 2.96"
ESE224²8(2x) 2A, (2x) 10A, (1x) Ethernet24048"1.680"
ESE64²10(6x) 2A, (1x) Ethernet24048"1.410"
ESE264²12(6x) 2A, (2x) 5A, (1x) Ethernet24048"1.680"
ESE284²14(8x) 2A, (2x) 10A, (1x) Ethernet24048"1.950"
ESE2124²18(12x) 2A, (2x) 5A, (1x) Ethernet24048"1.950"
ESE24278³41(27x) 2A, (4x) 5A, (2x) 10A, (1x) Ethernet24048"3.500"
ESE8278³43(27x) 2A, (8x) 5A, (1x) Ethernet24048"3.500"
ESE2358³45(35x) 2A, (2x) 10A, (1x) Ethernet24048"3.500"
ESE4358³47(35x) 2A, (4x) 5A, (1x) Ethernet24048"3.500"
ESE438³51(43x) 2A, (1x) Ethernet24048"3.500"

¹ES6A and ES12A only available for AP-1x1 models
²100 BaseT Ethernet Connections
³1000 BaseT Ethernet Connections

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