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Rotary Unions

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Rotary Unions are also referred to as:

  • Rotating Unions
  • Rotating Joints
  • Rotating Couplings
  • Rotating Swivels
  • Hydraulic Swivels
  • Rotary Joints
  • Rotary Couplings
  • Hydraulic Couplings
  • Rotary Swivels
  • Swivel Joints
  • Fluid Swivels
  • Swivel Unions

SPS Single Passage Rotary Union

The single passage SPS Series rotary unions are small, lightweight and corrosion-resistant featuring aluminum construction with a stainless steel shaft.

The SPS Series rotary unions can be mounted in the bore of our EST electrical slip rings for integrating a single fluid passage with power, signal and data transfer.

SPS 1 Passage Rotary Union

part # thru bore overall diameter overall length min torque* passage size slip ring option download
SPS-5110---1.5002.38080.156PDF
SPS-5210---1.5002.38080.250PDF
SPS-5310---1.7502.630120.375PDF
SPS-5410---1.7502.630120.500PDF
SPS-5510---2.7503.130160.750PDF
SPS-5610---2.7503.130161.000PDF

All dimensions are shown in inches. Click here to convert to Metric

*This is the minimum torque required to rotate based on zero pressure measured in inch-pounds

Max. Pressure¹200 PSI (15 BAR)
Max. Vacuum¹30 HG
Max. Rotational Speed¹up to 100 RPM
Max. Temperature¹350° F (176° C)²

¹Values are dependent on application parameters. Please consult with DSTI.
²High temperature applications may require alternative seal materials. Please consult with DSTI.

Connection Sizes1/8", 1/4", 3/8", 1/2", 3/4", 1" NPT. Other sizes available upon request.
Plating and CoatingsShaft: 304 Stainless Steel
Housing: Blue Anodize
Mounting OptionsTapped holes are provided on the housing with male NPT thread connection for shaft mounting.
Slip Ring OptionsThe SPS Series rotary unions can be mounted in the bore of our EST Slip Rings for integrating a single fluid passage with power, signal and data transfer.