Rotary Unions HPS Series

HPS Series 8-Passage Rotary Unions & Joints

HPS Series 8-Passage 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

DSTI 8-passage HPS Series rotary unions feature eight independent flow passages and a specialized sealing system capable of handling pressures up to 20,000 PSI [1,375 BAR].

HPS 8-passage models feature standard medium pressure housing connections, O-ring gland shaft connections, and an all-stainless steel construction for harsh marine and offshore environments.

If needed, DSTI can make modifications to meet application-specific requirements including changes to the HPS Series mounting configuration, connections, sealing system, and housing or shaft dimensions. See options.

Available Configurations

Part # Connection Passage Size Diameter Length Through Bore Min. Torque* Part Downloads Information
HPS-4380 [HPSM-4380]3/8" OD, 9/16"-18 UNF Medium Pressure []0.203" [5.156 mm]4.437" [112.7 mm]14.630" [371.603 mm]None55 ft-lbs [74.57 Nm] Get Quote

*Minimum torque required to rotate 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.

Technical Specifications

Maximum Pressure 20,000 PSI [1,375 BAR]
Maximum Speed 50 RPM
Maximum Vacuum N/A
Temperature Range 0° F to 220° F [-18° C to 105° C]
Suitable Media Oil/Hydraulic, Water/Glycol
Connection Type Medium Pressure
HPS Series Rotary Unions - Housing Material
Housing: Material (Plating/Coating) Stainless Steel
HPS Series Rotary Unions - Shaft Material
Shaft: Material (Plating/Coating) Stainless Steel (TDC)

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 HPS Series Rotary Unions

Custom Modifications

Easier and less expensive than you may think. We can modify our standard products to fit your project requirements.

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Custom Electrical Slip Rings for HPS Series Rotary Unions

Custom Slip Ring Integration

Our team works directly with our slip ring partners to design custom electrical slip rings to meet your exact requirements.

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