Water rotary union HPS Series

for oil4-passagemedium-pressure

Overview
DSTI 4-passage HPS Series rotary unions provide four independent flow passages with a specialized sealing system capable of handling pressures up to 20,000 PSI [1,375 BAR]. HPS 4-passage models feature medium-pressure housing connections, O-ring gland shaft connections, and an all-stainless-steel construction designed for harsh marine and offshore environments.

Key features

• Four independent flow passages
• All-stainless-steel housing and shaft resistant to corrosion
• Standard medium-pressure housing connections (supports NPT, BSPP, BSPT, SAE-ORB)
• O-ring gland shaft connections
• Specialized sealing system rated to 20,000 PSI [1,375 BAR]
• Suitable for marine and offshore applications
• Customizable mounting, connections, sealing system, housing and shaft dimensions

Configurations (representative model)
Part #: HPS-4340 [HPSM-4340]
Connection: 3/8" OD, 9/16"-18 UNF Medium Pressure
Passage Size: 0.203" [5.156 mm]
Diameter: 4.437" [112.7 mm]
Length: 8.780" [223.012 mm]
Through Bore: None
Min. Torque (zero pressure, Oil/Hydraulic media): 30.5 ft-lbs [41.35 Nm]
Available part documents: PDF Catalog, PDF Drawing, DWG (2D), STEP (3D), Installation & Mounting documentation

Technical data (summary)

• Maximum Pressure: 20,000 PSI [1,375 BAR]
• Maximum Speed: up to 50 RPM (series options vary)
• Maximum Vacuum: N/A
• Temperature Range: 0° F to 220° F [-18° C to 105° C] (higher temperatures require alternative seal materials)
• Connection Type: Medium Pressure (supports multiple standards across the product family)
• Suitable Media: Oil/Hydraulic, Water/Glycol (other media supported depending on configuration)

Notes
Operational life and required torque depend on application parameters including rotational speed, duty cycle, media and temperature. Applications using water above 212° F [100° C] or operating above 220° F [105° C] require alternative seal materials. Modifications are available for mounting configuration, connections, sealing system, and housing or shaft dimensions.

Technical specifications

• Series name: HPS Series
• Product type: 4-passage rotary unions & joints
• Construction: All-stainless-steel housing and shaft (shaft material: stainless steel (TDC))
• Maximum rated pressure: 20,000 PSI [1,375 BAR]
• Typical maximum speed: up to 50 RPM
• Temperature range: 0° F to 220° F [-18° C to 105° C]
• Connection types supported: NPT, BSPP, BSPT, SAE-ORB and others
• Suitable media examples: Oil/Hydraulic, Water/Glycol
• Example configuration (HPS-4340): Passage size 0.203" [5.156 mm]; Diameter 4.437" [112.7 mm]; Length 8.780" [223.012 mm]; Through bore: None; Min. torque: 30.5 ft-lbs [41.35 Nm]
• Available deliverables: PDF catalog, installation & mounting PDF, model drawing PDFs, DWG (2D) and STEP (3D) files