Water rotary union GP 10

for oilfor vacuumfor gas

Overview
The GP Series 10‑passage rotary unions provide ten independent fluid passages with specialized sealing suitable for vacuum and bidirectional pressures, enabling simultaneous transfer of different media. Standard construction is carbon steel (black oxide) for air/gas, coolant and hydraulic service; stainless steel variants are available for corrosion resistance and for water or corrosive media. Side shaft and housing connections are standard NPT or BSPP; optional O‑ring face‑seal glands can be specified. These unions are designed to integrate with compatible electrical slip rings when combined fluid and electrical transfer is required.

Configurations (selection)
GP-201-10 | 1/4"-18 NPT (G1/4" BSPP) | Passage: 0.250" [6.35 mm] | Diameter: 3.687" [93.65 mm] | Length: 10.000" [254.00 mm] | Through bore: 0.750" [19.05 mm] | Min. torque: 14.7 ft-lbs [19.93 Nm]
GP-301-10 | 3/8"-18 NPT (G3/8" BSPP) | Passage: 0.375" [9.525 mm] | Diameter: 3.937" [100 mm] | Length: 13.620" [345.95 mm] | Through bore: 0.750" [19.05 mm] | Min. torque: 23.3 ft-lbs [31.59 Nm]

Pressure Options (reference)
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

Speed Options (reference)
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

Connection Types (reference)
ASME-BPE | SCS
BSPP | SE, GP
BSPT | LT
NPT | SPS, LT, GP, GPS
SAE-ORB | SE, HVH
Medium Pressure | HPS
Other | Custom

Suitable Media (selection)
Air/Gas, Coolant, Oil/Hydraulic, Water/Glycol (Water/Glycol or coolant must include rust inhibitors; oil/hydraulic media should be petroleum-based).

Available Options

• Custom modifications to passages, ports, mounting or dimensions to meet project requirements.
• Integration with electrical slip rings to combine fluid transfer with power, signal or data lines.
• Optional O‑ring face‑seal glands for flush mounting or non‑threaded side connections (specify when ordering).
• Shaft connection options: standard side threaded, optional non‑threaded O‑ring face seals, and threaded interface mounting holes.

Notes & cautions
Maximum typical pressure for GP 10‑passage configurations: 7,500 PSI [515 BAR]. Maximum reference speed for GP Series: up to 500 RPM depending on configuration. Temperature range for standard seals: 0° F to 220° F [-18° C to 105° C]. Operational life depends on rotational speed, duty cycle and media. Applications above 220° F (105° C) or water media above 212° F (100° C) require alternative seal materials. Use rust inhibitors with Water/Glycol or coolant media; use petroleum‑based fluids for Oil/Hydraulic applications.

Technical specifications

• Brand: DSTI (Dynamic Sealing Technologies)
• Model / Series: GP Series
• Configuration: 10 independent flow passages (10‑passage)
• Maximum Pressure (typical GP 10‑passage): 7,500 PSI [515 BAR]
• Maximum Speed (typical): 500 RPM (series/configuration dependent)
• Maximum Vacuum: 30 HG
• Temperature Range (standard seals): 0° F to 220° F [-18° C to 105° C]
• Housing material: Carbon steel (black oxide); stainless steel versions available
• Shaft material: Carbon steel (black oxide); stainless steel versions available
• Standard connection types: NPT, BSPP (side connections on shaft and housing)
• Typical passage sizes (examples): 0.250" [6.35 mm], 0.375" [9.525 mm]
• Through bore example: 0.750" [19.05 mm]
• Min. torque to rotate (examples at zero pressure, Oil/Hydraulic): GP-201-10 = 14.7 ft-lbs [19.93 Nm]; GP-301-10 = 23.3 ft-lbs [31.59 Nm]
• Suitable media: Air/Gas, Coolant, Oil/Hydraulic, Water/Glycol (with rust inhibitors)