Single Passage Rotary Union

Our Single Passage Rotary Union is a high-performance rotating connector engineered for applications requiring the transfer of a single fluid medium—such as air, water, oil, or coolant—between stationary and rotating components. With robust sealing technology and precision bearings, it ensures reliable, leak-free operation even at high RPMs and pressures.

Built with hardened stainless steel or anodized aluminum, this rotary joint offers exceptional durability, corrosion resistance, and a compact design suitable for tight space installations.

Key Features of Our Single Passage Rotary Union

Reliable Sealing System

Equipped with carbon-graphite, ceramic, or mechanical seals to maintain tight sealing even under high-speed rotation.

Wide Media Compatibility

Supports air, hydraulic oil, coolant, and water—making it ideal for CNC spindles, textile machines, and rubber manufacturing.

High Speed & Pressure Performance

Operates smoothly at speeds up to 3000 RPM and pressures up to 300 PSI, depending on configuration.

Compact & Lightweight Design

Ideal for single-line fluid systems or compact equipment requiring minimal space and reduced weight.

Versatile Connection Types

Available with NPT, BSP, or metric threads. Custom port sizes from 1/8″ to 2″ are available upon request.

Low Maintenance, Long Service Life

Precision bearings and durable housing reduce wear and extend operational lifespan.

Typical Applications

  • CNC Machine Spindles
  • Printing Equipment
  • Rubber and Plastic Molding
  • Packaging Machinery
  • Automated Assembly Lines

Why Choose Our Single Passage Rotary Union?

  • Over 10 Years of OEM Manufacturing Experience
  • Competitive Pricing for Bulk Orders & Replacements
  • Engineering Support for Custom Modifications
  • Short Lead Time & Global Delivery
  • Strict Quality Control with 100% Leak Testing
  • Compatible with Deublin, DSTI, Kadant, and other brands
  • Sale! large rotary unions for air

    Dublin 1300 Series Large Rotary Unions for Air

    Original price was: $300.00.Current price is: $260.00.
    • Product name: Dublin 1300 Series Rotary Union Large Rotary Unions for Air
    • Max Pressure (Air): 150 PSI
    • Max Pressure (Hydraulic Oil): 1000 PSI
    • Max Speed: Up to 3000 RPM
    • Media Types: Air, Hydraulic Oil, Steam
    • Overall Length: Varies by model
    • Rotor Connection: Various options available (e.g., G 1/4″-19)
    • Operating Temperature: Up to 250°F (121°C)
  • Sale! large rotary unions for air

    Dublin 2200 Series Large Rotary Union for Air

    Original price was: $260.00.Current price is: $236.00.
    • Product name: Dublin 2200 Series Rotary Union Large Rotary Unions for Air
    • Max Pressure (Air):150 PSI
    • Max Pressure (Hydraulic Oil): 3000 PSI
    • eader”>Max Speed: Up to 24,000 RPM
    • Media Types: Air, Hydraulic Oil, Steam, Coolant
    • Overall Length: Varies by model
    • Rotor Connection: Various options available (e.g., G 1/4″-19)
    • Operating Temperature: Up to 250°F (121°C)
  • Sale! Large Rotary Unions for Air

    Dublin 1005 Series Large Rotary Unions for Air

    Original price was: $180.00.Current price is: $169.00.
    • Product name: Dublin 1005 Series Rotary Union Large Rotary Unions for Air
    • Max Pressure: Up to 140 bar (2030 PSI)
    • Max Speed: Up to 10,000 RPM
    • Media Types: Air, Hydraulic Oil, Coolant
    • Overall Length: Varies by model
    • Rotor Connection: Various options (e.g., 1/8 NPT)
    • Max Temperature: Up to 71°C (160°F)
    • Flow Rate : Up to 6.7 L/min (1.8 GPM)
  • Sale! deublin 1109-010-165

    Deublin 1109-010-165 Rotary Union- Coolant for CNC Machines

    Original price was: $120.00.Current price is: $108.00.
    • Part Number:1109-010-165
    • Supply Connection: 3/8″-18 NPT
    • Rotor Connection: 5/8″-18 UNF LH
    • Overall Length: 135 mm (5.315 inches)
    • Housing Diameter: 53.5 mm (2.106 inches)
    • Maximum Pressure (Coolant) :103.4 bar (1500 psi)
    • Maximum Pressure (MQL) :10 bar (150 psi)</li>
    • <strong&gt;Maximum Speed
    • : 20,000 RPM
    • Maximum Flow Rate (Coolant): 21.6 GPM (81.8 L/min)
    • Maximum Flow Rate (MQL): 72.1 CFM (2040 L/min)
    • Operating Temperature: Up to 71°C (160°F)
  • Sale! Large Rotary Unions for Air

    Dublin 1205 Series Large Rotary Unions for Air

    Original price was: $100.00.Current price is: $86.00.
    • Product name: Dublin 1205 Series Large Rotary Unions for Air
    • Rotor Connection: Various options (e.g., 1/2″-14 NPT, 3/4″-16 UNF)
    • B Port: Various options (e.g., 1/2″-14 NPT)
    • Overall Length: Ranges from 113 mm to 120 mm depending on model
    • Housing Diameter: Approximately 56.7 mm
    • Max Pressure (Air):150 psi
    • Max Pressure (Hydraulic Oil): 750 psi
    • Max Pressure (Vacuum):-13.75 psi
    • Max Speed: Up to 3500 RPM
    • Operating Temperature: Up to 250°F (121°C)
  • Sale! Dublin 17 Series Air Rotary Union

    Dublin 17 Series Pneumatic Hydraulic Rotary Union

    Original price was: $100.00.Current price is: $80.00.
    • ass=”product-table-cell product-table-header”>Product name:Dublin 17 Series Air Rotary Union
    • Max Pressure (Air): 150 PSI
    • Max Pressure (Hydraulic Oil: 3000 PSI
    • Max Speed: Up to 250 RPM
    • Media Types: Air, Hydraulic Oil, Vacuum
    • Overall Length: Varies by model
    • Rotor Connection: Various options available (e.g., G 3/8)
    • Operating Temperature: Up to 250°F (121°C)
  • Sale! rotary union for printing ink

    Advanced Rotary Union for Smooth Printing Ink Delivery

    Original price was: $80.00.Current price is: $60.00.
    • Part number: Replace Deubin 17-420-401
    • Pressure: 2.0MPA
    • Temperature: 120℃
    • Speed: 3500rpm
    • Medium: water, gas, oil
    • Installation method: External thread connection
  • Sale! water cooling rotary union

    Metallurgical Water Cooling Rotary Union for Steel Mill

    Original price was: $50.00.Current price is: $42.00.

    Water Cooling Rotary Union: Product Details The Water Cooling Rotary Union is an essential component designed to facilitate the efficient transfer of cooling water in various industrial applications. Engineered for high performance and reliability, this rotary union ensures optimal fluid dynamics while preventing leaks, making it ideal for use in manufacturing processes, CNC machines, and…

  • Sale!

    Continuous Casting Machine Embedded Rotary Union

    Original price was: $45.00.Current price is: $42.00.
    • Max.Speed:60RPM
    • Max. Pressure:1.2mpa
    • Max. Temperature:120 degrees
    • Applicable medium:Water, coolant
    • Model: Embedded rotary joint for continuous casting machine
  • Sale! High pressure rotary joint

    High Pressure Rotary Joint

    Original price was: $50.00.Current price is: $35.00.
    • Product name: High pressure rotary joint
    • Color: silvery, also Can be customized
    • Medium: Water, Hydraulic oil,etc
    • Size: 10-50A/Can be customized
    • Surface treatment: Polishing
    • Thread: BSPP BSPT NPT METRIC
    • Connection: Male
    • Business Type: Rotary Joint Manufacturers
    • Max Speed: 30RPM
    • Max Temperature: 100℃
    • Max Pressure: 20MPa
  • Sale! Mono Flow Rotary Union

    Mono Flow Rotary Union

    Original price was: $35.00.Current price is: $30.00.
    • Model Type: Mono Flow Rotary Union
    • Max Operating Pressure: 150 PSI (10 bar)
    • Max Operating Temperature: 250°F (121°C)
    • Max Speed: 100 RPM
    • Media Compatibility: Water, Oil, Air
    • Connection Types: Available NPT, BSP
  • Sale! rotating union waterrotationg union water

    High Quality High Speed Rotating Union Water

    Original price was: $15.00.Current price is: $13.00.
    • Media Types: Cooling Water, Gas
    • Max Pressure: Up to 28 bar (406 psi)
    • Max Temperature: Up to 300°C (572°F)
    • Connection Type: Flanged or threaded
    • Max Speed: Up to 150 RPM
  • Sale! H Series Hydraulic Rotary Union

    High Speed H Series Hydraulic Rotary Union Manufacturers

    Original price was: $15.00.Current price is: $12.00.
    • Media Types: Hydraulic Oil, Water, Steam, Thermal Fluids
    • Max Pressure: Up to 28 bar (406 psi)
    • Max Temperature: Up to 300°C (572°F)
    • Max Speed: Up to 150 RPM
    • Connection Type: Flanged or threaded
  • Sale! Mono-Flow-Rotating-Joint-

    H Mono Flow Rotary Union For Water Treatment Equipment

    Original price was: $15.00.Current price is: $12.00.
    • Media Types: Water, Oil, Air
    • Max Speed: Up to 3,500 RPM
    • Max Pressure: Up to 3,625 psi
    • Temperature Range: Up to 250°F (121°C)
    • Connection Types: NPT sizes from 1/4″ to 1″