Air rotary union HVH Series

for oilfor vacuumfor gas

Description
DSTI 4-passage HVH Series rotary unions provide independent high-flow channels with #8 or #16 SAE-ORB connections. Engineered for heavy equipment and outdoor applications, the HVH Series supports vacuum and bidirectional pressures up to 5,000 PSI [345 BAR] and includes a 0.500" [12.7 mm] through bore to integrate an electrical slip ring for combined fluid and electrical transfer. Construction uses an alloy steel shaft, ductile iron housing and a black oxide coating for enhanced corrosion resistance.

Main features

• Independent 4 high-flow passages (4-passage)
• Maximum pressure: 5,000 PSI [345 BAR] (bidirectional)
• Maximum speed: 20 RPM (standard HVH rating)
• Connections: #8 SAE-ORB or #16 SAE-ORB
• Through bore: 0.500" [12.7 mm] for slip ring integration
• Suitable media: Air/Gas and Oil/Hydraulic (oil/hydraulic must be petroleum-based)
• Maximum vacuum: 30 HG
• Temperature range: 0° F to 220° F [-18° C to 105° C]
• Heavy-duty construction: Alloy steel shaft, ductile iron housing, black oxide coating
• Designed for harsh outdoor applications (forestry, mining, construction, heavy equipment)

Configurations (example part data)
Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque
HVH-304041 | #8 SAE-ORB | 0.440" [11.176 mm] | 5.190" [131.826 mm] | 7.490" [190.246 mm] | 0.500" [12.7 mm] | 14 ft-lbs [18.98 Nm]
HVH-306041 | #16 SAE-ORB | 0.880" [22.352 mm] | 6.940" [176.276 mm] | 10.110" [256.795 mm] | 0.500" [12.7 mm] | 28 ft-lbs [37.96 Nm]

Series / options summary
Pressure options (series examples): 200 PSI [15 BAR], 600 PSI [40 BAR], 5,000 PSI [345 BAR], 7,500 PSI [515 BAR], 20,000 PSI [1,375 BAR], Other (custom).
Speed options (series examples): 20 RPM, 50 RPM, 75 RPM, 300 RPM, 500 RPM, Other (custom).
Connection types supported across series: ASME-BPE, BSPP, BSPT, NPT, SAE-ORB, Medium Pressure, Other (custom).
Suitable media across series: Air/Gas, Chemical, Coolant, DI/Tap Water, Food-Grade, Oil/Hydraulic, Steam, Water/Glycol, Other (custom).

Technical specifications

• Denomination: HVH Series
• Maximum working pressure: 5,000 PSI [345 BAR]
• Maximum speed (HVH standard): 20 RPM
• Maximum vacuum: 30 HG
• Temperature range: 0° F to 220° F [-18° C to 105° C]
• Through bore (standard): 0.500" [12.7 mm] (for slip ring integration)
• Available passage sizes (examples): 0.440" [11.176 mm], 0.880" [22.352 mm]
• Connection types (HVH examples): #8 SAE-ORB, #16 SAE-ORB
• Housing material & coating: Ductile Iron (Black Oxide)
• Shaft material & coating: Alloy Steel (Black Oxide)
• Suitable media: Air/Gas, Oil/Hydraulic (petroleum-based required for Oil/Hydraulic)
• Typical part examples: HVH-304041, HVH-306041 (see configuration lines for dimensions and min. torque)
• Notes: Operational life depends on rotational speed and duty cycle; applications above listed temperature limits or using water at >212° F require alternative seal materials; torque to rotate is minimum based on zero pressure and specific media (may increase with other media or dry-running).