Air Rotary Union

An air rotary union is a precision mechanical device designed to transfer compressed air from a stationary supply line to rotating equipment while maintaining a sealed and leak-free connection. In modern automated production systems, air rotary unions play a critical role in ensuring consistent pneumatic performance and uninterrupted machine operation.

As a professional manufacturer and exporter of rotary unions, we supply high-quality air rotary unions engineered for industrial automation, machine tools, robotics, and rotating equipment. Our solutions are designed to deliver stable airflow, high rotational reliability, and long service life under continuous operation.

With advanced manufacturing capabilities and strict quality control processes, our products serve as cost-effective alternatives to well-known international rotary union brands, helping global customers optimize equipment performance while reducing procurement costs.

This category page presents our complete range of air rotary union products, allowing engineers, system integrators, and procurement professionals to easily select the most suitable model for their pneumatic applications.

What’s an Air Rotary Union?

An air rotary union (also commonly called a pneumatic rotary union, air rotary joint, or rotary air union) is a mechanical sealing device that allows compressed air or vacuum to pass through a rotating interface.

The device connects:

a stationary compressed air supply line
to a rotating shaft or component

while maintaining an airtight seal.

Air rotary unions facilitate essential pneumatic functions, such as motion and clamping, in advanced automated machinery.

Core Functions

A high-quality air rotary joint performs several essential functions:

transferring compressed air into rotating machinery
preventing air leakage during rotation
maintaining stable pressure transmission
supporting continuous high-speed operation

Reliable pneumatic rotary unions are essential for ensuring efficient energy use, stable air pressure, and consistent machine performance.

Why Choose Our Air Rotary Unions?

As an experienced manufacturer of rotary unions for international markets, we provide solutions designed for reliability and cost efficiency.

Our advantages include:

precision CNC machining
strict quality inspection procedures
OEM and custom engineering support
competitive pricing for global customers
reliable export supply chain

Our products are widely used by equipment manufacturers, maintenance engineers, and industrial distributors worldwide.

Request a Quote or Technical Consultation

If you are searching for a high-performance air rotary joint for your pneumatic system, our engineering team can help you identify the best solution.

We provide:

technical product catalogs
rotary union selection guidance
OEM replacement options
customized designs for specialized machinery

Showing all 27 resultsSorted by price: high to low

Sale!
Deublin 1479 Series Air Rotary Union
Original price was: $700.00.Current price is: $620.00.
- Product name: Dublin 1479 Series Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate: Up to 28.5 GPM (108 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: 1/2″ NPT
- Housing Connection: Flanged
- Operating Temperature: Up to 250°F (121°C)
Sale!
Buy Deublin 1379 Series Air Rotary Connector | OEM Price & Fast Shipping
Original price was: $700.00.Current price is: $620.00.
- Product name: Dublin 1379 Series Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate (Air) : Up to 53 L/min (14 GPM)
- Max Speed: Up to 3000 RPM
- Rotor Connection: G 3/8″ NPT
- Overall Length: Varies by model
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 1690 000 105 Rotary Union Alternative | High-Speed Air Rotary Joint Manufacturer
Original price was: $350.00.Current price is: $320.00.
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate (Air): Up to 40 CFM (1132 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: 1″-11 G RH
- Housing Connection: 1/4″-18 NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 1890 Series Rotary Union Alternative | High-Speed Air Rotary Joint Manufacturer
Original price was: $350.00.Current price is: $320.00.
- Product name: Dublin 1890 Series Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate: Up to 300 CFM (8497 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: G 1-1/2″ RH
- Housing Connection: 3/4″ NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 1690 Series Air Rotary Union Replacement Manufacturer – Trusted Chinese Manufacturer
Original price was: $350.00.Current price is: $320.00.
- Product name: Deublin 1690 Series Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate (Air) : Up to 40 CFM (1132 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: 1″-11.5 NPT RH
- Housing Connection: 1/4″-18 NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
High-Performance Rotary Union Alternative to Deublin 1790000114
Original price was: $350.00.Current price is: $319.00.
- Product name: Deublin 1790-000-114 Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate (Air) : Up to 40 CFM (1132 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: G 1¼ NPT RH
- Housing Connection: ½ NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 1790 Series Rotary Union Replacement for High-Speed CNC Applications
Original price was: $350.00.Current price is: $319.00.
- Product name: Dublin 1790 Series Air Rotary Union
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Flow Rate (Air) : Up to 40 CFM (1132 L/min)
- Max Speed: Up to 3000 RPM
- Rotor Connection: G 1¼ NPT RH
- Housing Connection: ½ NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 355 Series Rotary Union Replacement – OEM Equivalent
Original price was: $300.00.Current price is: $285.00.
- Product Type: Deublin 355 Series Compatible Rotary Union
- Application: CNC Machine Tools, Cooling Systems, Industrial Rotary Equipment
- Structure: Single Passage Rotary Union
- Replacement Solution: Compatible with Deublin 355 Series Rotary Unions
- Rotor Connection: Various options available (e.g., G 1/4″-19)
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 250 Series Large Rotary Union Cost-Effective Alternative Manufacturer
Original price was: $280.00.Current price is: $270.00.
- Max Pressure (Air): 150 PSI
- Max Pressure (Vacuum): -13.75 PSI
- Max Flow Rate (Air): Up to 300 CFM
- 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!
Deublin 1300 Series Rotary Union Replacement Manufacturer
Original price was: $300.00.Current price is: $260.00.
- Max Pressure: Pressure rating depends on the model configuration and media.
- Max Speed: Up to 3000 RPM
- Media Types: Air, Hydraulic Oil
- Overall Length: Varies by model
- Rotor Connection: Various thread configurations available
- Operating Temperature: Up to 250°F (121°C)
- Typical applications: Compressed air/ Hydraulic oil/ Industrial fluids
Sale!
Deublin 2620 Series Rotary Union Alternative | Dual Passage CNC Rotary Joint Manufacturer
Original price was: $260.00.Current price is: $243.60.
- Product name: Dublin 2620 Series Air Rotary Union
- Max Pressure (Air): 145 PSI (10 bar)
- Max Pressure (Coolant): 1015 PSI (70 bar)
- Max Air Flow Rate: 74.2 CFM (2100 L/min)
- Max Coolant Flow Rate: 18.2 GPM (69 L/min)
- Max Temperature (Air): 160°F (71°C)
- Max Temperature (Coolant): 160°F (71°C)
- Rotor Connectio: 4.25″ Flange, 0.75″ Pilot
- Housing Connection: 1/4″-18 NPT
Sale!
Deublin 2117 Series Rotary Union Replacement Manufacturer
Original price was: $220.00.Current price is: $206.00.
- Product Type: Single-Passage Rotary Union
- Application: CNC Machine Tools / Industrial Equipment
- Media: Coolant / Air / Light Oil
- Structure: Rotating Shaft Type Rotary Joint
- Manufacturing: CNC Precision Machining
- Customization: Available
Sale!
Deublin 1005 Series Rotary Unions Replacement for Air Applications
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 1115 Series Large Rotary Union Replacement Made in China
Original price was: $140.00.Current price is: $120.00.
- Rotor Connection： G 1/4″-19 RH
- B Port：1/4″-18 NPT
- Overall Length：3.189 in
- Media Types： Air, Hydraulic Oil, Vacuum
- Max Pressure (Air)：150 psi
- Max Pressure (Hydraulic Oil)：1000 psi
- Max Pressure (Vacuum)：-13.75 psi
- Max Flow Rate (Air)：40 CFM
- Max Flow Rate (Hydraulic Oil):4 GPM
- Operating Temperature: Up to 250°F (121°C)
Sale!
Reliable Dual-Channel Rotary Unions Designed for Demanding Industrial Applications
Original price was: $120.00.Current price is: $110.00.
- Maximum Pressure: Up to 400 bar (5800 PSI)
- Maximum Rotational Speed: Up to 42,000 RPM
- Fluid Compatibility: Hydraulic oil, air, water, coolants
- Size Range: Customizable to fit specific needs
- Temperature Range: -20°C to 120°C
Sale!
Deublin 1109-010-165 Rotary Union- Coolant for CNC Machines
Original price was: $120.00.Current price is: $108.00.
- 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 (MQL):10 bar (150 psi)
- Maximum Speed: 20,000 RPM
- Operating Temperature: Up to 71°C (160°F)
Sale!
Deublin 1109 020 188 Rotary Union Alternative Made in China
Original price was: $120.00.Current price is: $108.00.
- Part Number: Compatible with Deublin 1109-020-188
- Maximum Pressure: (Hydraulic) 140 bar (2030 PSI)
- Maximum Pressure: (Air) 10 bar (150 PSI)
- Maximum Speed: 20,000 RPM
- Media Types: Hydraulic Oil, Air, Vacuum
- Rotor Connection: M16x1.5 LH
- Housing Connection G 1/4″ NPT
- Overall Length 135 mm
- Housing Diameter 135 mm
Sale!
Deublin 1102 Series Replacement Rotary Union-Factory Price & Fast Delivery
Original price was: $110.00.Current price is: $100.00.
- Product Type: Rotary Union Replacement for Deublin 1102
- Media: Steam, Hot Water, Cold Water, Air
- Connection Size: 3/8″, 1/2″, 3/4″ NPT or BSP
- Housing Material: Brass / Stainless Steel
- Seal Material: Carbon-Graphite / Ceramic
- Bearing Type: Deep-Groove Ball Bearings
- Pressure Rating: Up to 150 PSI (10 bar)
- Temperature Range: -20°C to 180°C (-4°F to 356°F)
- Max Speed: 1000 RPM
Sale!
Deublin 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!
Hydraulic Rotary Union Pneumatic for Air, Vacuum, and Fluids
Original price was: $90.00.Current price is: $81.00.
- Material：Stainless steel
- Max.Speed：7000RPM
- Max. Pressure：5.0MPa
- Max.Temperature：100℃
- Applicable Medium：Water, Coolant, Hydraulic Fluid
Sale!
High-Quality Deublin 21 Series Air Rotary Union Replacement
Original price was: $100.00.Current price is: $80.00.
- Max Pressure (Air): 150 PSI
- Max Pressure (Hydraulic Oil): 3000 PSI
- Max Speed: Up to 3000 RPM
- Media Types: Air, Hydraulic Oil, Vacuum
- Overall Length: Varies by model
- Rotor Connection: 3/4″-14 NPT RH
- Housing Connection: 1/2″-14 NPT
- Operating Temperature: Up to 250°F (121°C)
Sale!
Deublin 17 Series Rotary Union Equivalent | Air & Hydraulic Rotary Joint Manufacturer
Original price was: $100.00.Current price is: $80.00.
- 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!
Air Rotary Union
Original price was: $100.00.Current price is: $80.00.
- Max Pressure: Up to 10 bar (145 psi)
- Max Temperature: Up to 80°C (176°F)
- Rotational Speed: Up to 3,500 rpm
- Materials: Nickel-Plated Steel, Carbon Graphite Seals
- Seal Type: Balanced Mechanical Seals
Sale!
High Pressure High Speed Stainless Steel Rotary Joint Supplier
Original price was: $40.00.Current price is: $35.00.
- Max.Speed: ≤3000RPM
- Max. Pressure: ≤1.5MPA
- Max Temperature: ≤150℃
- Applicable medium: Water, AIR, Oxygen, Hydrogen, etc
Sale!
Industrial Pneumatic Swivel Union – Leak-Free Rotating Air Joints
Original price was: $35.00.Current price is: $31.00.
- Material: Corrosion-resistant stainless steel
- Rotational Speed: High-speed options available
- Pressure Rating: Suitable for high-pressure systems
- Temperature Range : -50°C to +260°C
- Port Sizes Available : G1/8″, G1/4″, M5, G3/8″
- Pipe Sizes Supported: 4mm, 6mm, 8mm, 10mm, 12mm
Sale!
Reliable Air Rotary Joints for Continuous Rotation Applications
Original price was: $50.00.Current price is: $30.00.
- Max Pressure: Up to 10 bar (145 psi)
- Max Temperature: Up to 80°C (176°F)
- Rotational Speed: Up to 3,500 rpm
- Materials: Nickel-Plated Steel, Carbon Graphite Seals
- Seal Type: Balanced Mechanical Seals
Sale!
Single Passage Rotary Union Manufacturer and Deublin Replacement Supplier
Original price was: $35.00.Current price is: $30.00.
- Max Pressure: Up to 10 bar (145 psi)
- Max Temperature: Up to 80°C (176°F)
- Rotational Speed: Up to 3,000 RPM
- Materials: Stainless Steel, Carbon Graphite Seals
- Seal Type: Balanced Mechanical Seals