GPM-201-12-OF, 12-Passage Rotary Union, G1/4"-19 BSPP Housing Connections, O-ring Shaft Seal Gland, Carbon Steel

Product Code:
  • GPM-201-12-OF-R.A
General purpose, 12-flow passage, through-bore rotary union with G1/4"-19 BSPP housing connections,shaft O-ring face seal glands for flush mounting the union to an interface and carbon steel (black oxide) construction

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Additional Information

Additional Information

Downloads GP Series Catalog PDF Drawing DWG [2D] STEP [3D]
Number of Passages 12
Connection Type G1/4"-19 BSPP
Max. Pressure 7,500 PSI [515 BAR]
Max. Speed 500 RPM
Media Type Water/Glycol
Performance Charts Pressure vs. Speed Data
Material Type Carbon Steel
Diameter 4.437" [112.7 mm]
Length 13.380" [339.853 mm]
Through Bore 0.750" [19.05 mm]
Min. Torque 19.2 ft-lbs [26.03 Nm]
Product Disclaimer Suitable Water/Glycol or Coolant media must have rust inhibitors present. Oil/Hydraulic media must be petroleum-based. Please consult with DSTI for approval.

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. 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 12-passage, GPM Series rotary unions for general-purpose use, feature BSPP housing connections and shaft O-ring face seal glands for flush mounting the union to an interface (the threaded shaft connections are plugged).

They feature specialized sealing technology suitable for vacuum and bidirectional pressures and independent flow passages capable of transferring different media types simultaneously.

The carbon steel (black oxide) construction is suitable for air/gas and hydraulic service, in addition to water/glycol and coolant when rust inhibitors are present.

For more information, see GPM Series 12-Passage Rotary Unions.