Water rotary union SE Series

for steamfor oilfor food products

Overview
SE Series 2-passage rotary unions provide two independent fluid passages in a compact rotary interface for applications with high pressure and limited space. Standard models feature side-threaded shaft and housing connections; optional shaft O-ring glands allow face/flush mounting when specified. SE models are designed to integrate with electrical slip rings to combine fluid transfer with electrical power, signal or data transfer.

Key features

• Two independent flow passages (2-passage)
• High maximum pressure options for SE series (up to 7,500 PSI [515 BAR])
• Maximum speed options up to 300 RPM for SE series
• Standard side-threaded connections; optional axial O-ring face/flush mounting
• Integrates with electrical slip rings for combined fluid and electrical transfer
• Housing and shaft: carbon steel (black oxide) standard; other materials available on request

Technical specifications

• Series / Model: SE Series
• Maximum Pressure: up to 7,500 PSI [515 BAR] (series-dependent)
• Maximum Speed: up to 300 RPM (series-dependent)
• Maximum Vacuum: 30 HG
• Temperature Range: 0°F to 220°F [-18°C to 105°C]; higher temperatures require alternative seal materials
• Connection Types: SAE-ORB, BSPP (plus other series-specific options such as NPT, BSPT, ASME-BPE)
• Shaft Connection Options: radial SAE-ORB or BSPP standard; optional axial O-ring face seal; threaded mounting holes; optional shaft flange or housing flange mounting
• Suitable Media: air/gas, coolant, oil/hydraulic (petroleum-based), water/glycol, chemical (series-dependent), DI/tap water, food-grade (SCS series), steam (custom)

Operating limits & notes
Suitable water/glycol or coolant media must contain rust inhibitors. Oil/hydraulic media must be petroleum-based. Operational life and minimum torque depend on rotational speed, media and duty cycle. Applications with fluid or ambient temperatures above 220°F (105°C) require alternative seal materials. Use water media above 212°F (100°C) only with appropriate seal materials.

Example configuration

• Part: SE-1121 [SEM-1121]
• Connection: #4 SAE-ORB [G1/8"-28 BSPP]
• Passage Size: 0.187" [4.75 mm]
• Diameter: 2.937" [74.6 mm]
• Length: 3.562" [90.475 mm]
• Through Bore: 0.375" [9.525 mm]
• Minimum torque to rotate (zero pressure, Oil/Hydraulic): 23 in-lbs [2.6 Nm]