1. Hydraulics - Pneumatics
  2. Pipe, Tube and Fitting
  3. Oil rotary union
  4. DSTI - Dynamic Sealing Technologies, Inc.

Air rotary union HVH 6 series
for oilfor vacuum6-passage

air rotary union
air rotary union
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for air, for oil, for vacuum
Number of passages
hydraulic, pneumatic, for heavy-duty applications, for construction vehicles
steel, cast iron

345 bar (5,004 psi)

Max.: 345 bar (5,004 psi)

Min.: 0 bar (0 psi)

Rotational speed

20 rpm (126 rad.min-1)

Max.: 20 rpm (126 rad.min-1)

Min.: 0 rpm (0 rad.min-1)

Nominal size

Max.: 256 mm (10.079 in)

Min.: 131 mm (5.157 in)


DSTI 6-passage HVH Series rotary unions are available with either #8 or #16 SAE-ORB connections and feature independent flow channels suitable for vacuum and bidirectional pressures up to 5,000 PSI [345 BAR]. Designed for heavy equipment and outdoor-use applications, the heavy-duty construction consists of an alloy steel shaft, ductile iron housing and black oxide coating for improved corrosion protection. This series is ideal for equipment that is operated in harsh, outdoor environments such as forestry, mining and construction industries. Need to combine fluid with electrical power, signal and/or data transfer? No problem. All HVH models come with a .50" [12.7 mm] open through bore for integrating one of our standard electrical slip rings with it. Available with two connection types; #8 SAE-ORB or #16 SAE-ORB


HVH Series
HVH Series
16 Pages

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.