Rotary Unions (High Flow Volumes)

Product Announcement from DSTI - Dynamic Sealing Technologies, Inc.

Rotary Unions (High Flow Volumes)-Image

The HVH Series multiple passage rotary unions are available in 3, 4, 6 and 8 passage models. Designed for applications requiring high flow volume, the HVH Series have larger diameter flow passages suitable for vacuum & bidirectional pressures up to 5000 PSI [345 BAR]. 

A heavy-duty alloy steel construction with corrosion-resistant QBQ nitride surface treatment and protected ball bearings makes the HVH Series an ideal solution for tough, outdoor environments. 

All models come standard with female tapped connections on the face of the shaft and the side of the housing. 

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


  • Protected ball bearing design suitable for harsh/outdoor environments
  • Heavy duty alloy steel construction
  • Corrosion resistant Nitride surface treatment standard
  • Available with electrical slip ring options for power or data transfer

Technical Specifications

Max. Pressure: 5,000 PSI (345 BAR)
Max. Vacuum: 30 HG
Max. Rotational Speed: up to 50 RPM
Temperature Range: 0° F to 220° F (-18° C to 105° C)
Media Types: Air/Gas, Oil, Water/Glycol
Connection Types: SAE, BSPP