GPS-140, 4-Passage Rotary Union, 1/8"-27 NPT Connections, Stainless Steel

GPS-140, 4-Passage Rotary Union, 1/8"-27 NPT Connections, Stainless Steel
Product Code:
  • GPS-140-R.B
General purpose, 4-flow passage rotary union with 1/8"-27 NPT connections, shaft O-ring face seal glands for flush mounting the union to an interface and stainless steel construction

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Additional Information

Additional Information

Downloads GPS Series Catalog PDF Drawing DWG [2D] STEP [3D]
Number of Passages 4
Connection Type 1/8"-27 NPT
Max. Pressure 7,500 PSI [515 BAR]
Max. Speed 500 RPM
Media Type Air/Gas, Chemical, Coolant, DI/Tap Water, Oil/Hydraulic, Water/Glycol
Performance Charts Pressure vs. Speed Data
Material Type Stainless Steel
Diameter 2.687" [68.25 mm]
Length 4.696" [119.279 mm]
Min. Torque 1.9 ft-lbs [2.58 Nm]
Product Disclaimer Values listed 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. Some applications using chemical or water-based media may require alternative sealing materials. Please consult with DSTI regarding your specific application requirements.

Value listed for the minimum torque required to rotate is based on zero pressure with oil/hydraulic media. Required torque to rotate may be greater when using other media types or dry running. For specific torque requirements, please contact DSTI to discuss your application.


The 4-passage, GP Series rotary unions for general-purpose use, features a unique shaft configuration with threaded NPT connections and an O-ring face seal gland for flush mounting the union to an interface. They feature specialized sealing technology suitable for vacuum and bidirectional pressures and independent flow passages capable of transferring different media types simultaneously.The stainless steel construction prevents corrosion in harsh environments and is ideal for applications transferring water or other corrosive media types.

For more information, see GPS Series 4-Passage Rotary Unions.