Water rotary union GP series

for oilfor vacuumfor chemicals

Product Overview
The GP Series 10‑passage rotary unions provide ten independent flow passages for simultaneous transfer of different media. Available in carbon steel (black oxide) and stainless steel variants, these unions support vacuum and bidirectional pressure sealing and are designed to integrate with compatible electrical slip rings for combined fluid and electrical/data routing.

Pressure Options

• 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

• 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 Types

• 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

• Air / Gas
• Coolant
• Oil / Hydraulic (petroleum‑based)
• Water / Glycol (use rust inhibitors for carbon steel)
• Chemical and DI/Tap Water (via specific series or custom designs)

Configurations / Example Part Numbers
GP‑201‑10 — Connection: 1/4\"‑18 NPT (also available as G 1/4\" BSPP); Passage size: 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 — Connection: 3/8\"‑18 NPT (also available as G 3/8\" BSPP); Passage size: 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]

Mounting & Shaft Connection Options

• Standard threaded side connections on shaft and housing (plugged when O‑ring face seal gland option is used)
• Optional non‑threaded O‑ring face seal glands for flush mounting (must be specified at order)
• Threaded interface mounting holes

Downloads / Documentation
PDF documentation is available for the GP Series, including product catalog and installation & mounting guide. Contact supplier for CAD files and certification documents.

Technical Specifications

• Series: GP Series (10‑passage models)
• Number of passages: 10 independent flow passages
• Maximum pressure (typical GP listing): up to 7,500 PSI [515 BAR] (series‑dependent)
• Maximum speed (typical GP listing): up to 500 RPM (series‑dependent)
• Maximum vacuum: 30 in HG
• Temperature range: 0° F to 220° F [-18° C to 105° C]
• Standard connection types: NPT, BSPP (other standards available)
• Housing material: Carbon Steel (black oxide); stainless steel variants available
• Shaft material: Carbon Steel (black oxide); stainless steel variants available
• Typical through bore examples: 0.750\" [19.05 mm] (varies by part number)
• Typical minimum torque to rotate (zero pressure, oil/hydraulic media): GP‑201‑10 = 14.7 ft‑lbs [19.93 Nm]; GP‑301‑10 = 23.3 ft‑lbs [31.59 Nm] (actual torque may vary with media and dry running)
• Mounting: Side threaded connections or O‑ring face seal glands for flush mounting (specify when ordering)