Rotary Unions GP Series

GP Series Rotary Unions & Joints

GP Series 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
*Stainless steel (housing/shaft) material option is recommended for all liquid media applications.

The GP Series multiple passage rotary unions are available in 2, 3, 4, 6, 8, 10 and 12 passage models. These general-purpose rotary unions feature specialized DSTI sealing technology suitable for vacuum and bidirectional pressures up to 7,500 PSI [515 BAR], and a shaft configuration that consists of individual female tapped connections with an O-ring gland for optional face/flush mounting.

GP Series rotary unions come standard with a carbon steel / black oxide construction suitable for hydraulic and pneumatic service. Stainless steel GP models are available to prevent corrosion for use with applications requiring water or corrosive media transfer.

10 and 12 passage GP Series models come standard with threaded connections on the sides of the shaft and housing. Models are also available with optional shaft O-ring glands for face/flush mounting (which must be specified when ordering).

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

Available Configurations

Technical Specifications

Maximum Pressure 7,500 PSI [515 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, Chemical, DI/Tap Water, Oil, Water/Glycol
Connection Type NPT, BSPP
GP Series Rotary Unions - Housing Material
Housing: Material (Plating/Coating) Carbon Steel (Black Oxide) or Stainless Steel
GP Series Rotary Unions - Shaft Material
Shaft: Material (Plating/Coating) Carbon Steel (Black Oxide) or Stainless Steel (TDC)

*Stainless steel (housing/shaft) material option is recommended for all liquid media applications. 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 GP 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 GP 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 GP Series rotary unions.

View Options


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