Air rotary union HPS Series

for chemicalsfor oilfor water

Overview
The DSTI HPS Series 6-passage rotary unions provide six independent fluid passages in a single rotating assembly. Designed for medium-pressure service with specialized sealing capable of up to 20,000 PSI [1,375 BAR], these all-stainless-steel units are suitable for harsh marine and offshore environments. HPS 6-passage models include medium-pressure housing connections and O-ring gland shaft connections. DSTI offers application-specific modifications for mounting, connections, sealing systems, and housing/shaft dimensions to meet project requirements.

Key Features

• Six independent flow passages (6-passage design)
• Specialized sealing system rated up to 20,000 PSI [1,375 BAR]
• Medium-pressure housing connections (standard on HPS 6-passage)
• O-ring gland shaft connections
• All-stainless-steel construction for corrosion resistance in harsh environments
• Configurable mounting, connections, sealing systems, housing and shaft dimensions

Representative Configuration (table)
Part # | Connection | Passage Size | Diameter | Length | Through Bore | Min. Torque*
HPS-4360 | 3/8" OD, 9/16"-18 UNF Medium Pressure | 0.203" [5.156 mm] | 4.688" [119.075 mm] | 12.130" [308.103 mm] | None | 44 ft-lbs [59.66 Nm]

Pressure Options (table)
Max. Pressure | Series
200 PSI [15 BAR] | SPS, LT, SE, GP, GPS, SCS, HVH, HPS
600 PSI [40 BAR] | SPS, LT, SE, GP, GPS, HVH, HPS
5,000 PSI [345 BAR] | SE, GP, GPS, HVH, HPS
7,500 PSI [515 BAR] | SE, GP, GPS, HPS
20,000 PSI [1,375 BAR] | HPS
Other | Custom solutions available

Speed Options (table)
Max. Speed | Series
20 RPM | SPS, LT, SE, GP, GPS, SCS, HVH, HPS
50 RPM | SPS, LT, SE, GP, GPS, SCS, HPS
75 RPM | SPS, LT, SE, GP, GPS, SCS
300 RPM | SPS, LT, SE, GP, GPS, SCS
500 RPM | SPS, LT, GP, GPS, SCS
Other | Custom solutions available

Connection Type (table)
Connection Type | Series
ASME-BPE | SCS
BSPP | SE, GP
BSPT | LT
NPT | SPS, LT, GP, GPS
SAE-ORB | SE, HVH
Medium Pressure | HPS
Other | Custom solutions available

Suitable Media (table)
Suitable Media | Series
Air/Gas | SPS, LT, SE, GP, GPS, SCS, HVH, HPS
Chemical | GPS, SCS, HPS
Coolant | SE, GP, GPS, SCS, HPS
DI/Tap Water | GPS, SCS, HPS
Food-Grade | SCS
Oil/Hydraulic | SE, GP, GPS, SCS, HVH, HPS
Steam | Custom
Water/Glycol | SE, GP, GPS, SCS, HPS
Other | Custom solutions available

Downloads (product literature)

• HPS Series Catalog (PDF available)
• HPS Series Installation & Mounting (PDF available)

Notes

• All technical values depend on application parameters; operational life depends on rotational speed and duty cycle.
• Applications with operating temperatures above 220°F (105°C) or water media above 212°F (100°C) require alternative seal materials.
• *Minimum torque value shown is the torque required to rotate at zero pressure with Oil/Hydraulic media (or Air/Gas for SPS). Required torque may be greater for different media or dry running.

Technical Specifications

• Series: HPS Series
• Passage count: 6 independent passages
• Maximum Pressure: 20,000 PSI [1,375 BAR]
• Maximum Speed: 50 RPM (typical maximum offered for HPS)
• Maximum Vacuum: N/A (not specified)
• Temperature Range: 0° F to 220° F [-18° C to 105° C]
• Suitable Media: Oil/Hydraulic, Water/Glycol (also supports Air/Gas, Coolant, DI/Tap Water, Chemical depending on series and options)
• Housing Material: Stainless Steel
• Shaft Material: Stainless Steel (TDC)
• Connection Type: Medium Pressure connections (standard on HPS 6-passage)
• Example model torque: HPS-4360 minimum torque 44 ft-lbs [59.66 Nm]
• Example mechanical dims (HPS-4360): Passage size 0.203" [5.156 mm], Diameter 4.688" [119.075 mm], Length 12.130" [308.103 mm]