Dublin 2620 Series Rotary Union Alternative | Dual Passage CNC Rotary Joint Manufacturer

Description

The Dublin 2620 Series Rotary Union (also widely known as Deublin 2620 series) is a dual-passage rotary union designed for applications requiring simultaneous transfer of compressed air and coolant in high-speed rotating systems.

For manufacturers facing high costs, long lead times, or limited customization options, our engineered alternative provides a fully interchangeable and cost-efficient solution, built for real industrial performance.

Unlike standard aftermarket products, our rotary unions are developed through application-driven engineering, ensuring reliable operation in demanding CNC and automation environments.

Fitting Size	Serial Number	Maximum Air Pressure (PSI)	Maximum Fluid Pressure (PSI)	Maximum Temperature (℉)	MAX.R.PIM NPT THREADS	MAX.R.P.M STRAIGHT THREADS	MAX.R.P.M PILOT OR FLANGE
1/8"	1005 - 020	150	1000	250	1500	3500	-
	1102 - 070	150	1000	250	1500	3500	-
	17 - 025	150	3000	250	250	250	-
1/4"	1109 - 014	-	1500	160	-	-	20000
	1116 - 048	-	1000	250	-	-	10000
	AP8	-	5700	200	1500	-	-
	D8	-	6400	250	20	-	-
	1115 - 000	150	500	250	1500	3500	-
	902	-	1000	160	-	-	10000
	1100 - 200	-	1500	250	-	-	15000
	1108 - 001	-	1000	160	-	-	15000
	1109 - 011	-	1000	160	-	-	15000
3/8"	1117 - 002	-	1000	250	-	-	20000
	1116 - 400	-	1000	250	-	-	10000
	1129 - 002	-	2000	250	1500	-	20000
	1116 - 600	-	1000	250	-	-	-
	AP10	-	6400	250	20	-	-
	D10	-	-	250	-	-	-
	1205 - 000	150	750	250	1500	3500	-
1/2"	2200 - 008	150	1000	250	1500	3500	-
	21 - 001	150	3000	250	250	250	-
	AP12	-	5700	200	1500	-	-
	D12	-	6400	250	20	-	-
3/4"	290 - 094	150	1000	250	1500	3500	-
	D20	-	6400	250	20	-	-
1"	355 - 021	150	1000	250	1500	3000	-
	D25	-	6400	250	20	-	-
1 - 1/4"	D32	-	6400	250	20	-	-
1 - 1/2"	492 - 000	150	750	250	1500	2500	-
	D40	-	6400	250	20	-	-

⚙️ Technical Overview

The 2620 series rotary union is specifically designed for:

• Dual-channel media transfer (air + coolant)
• High-speed spindle systems
• Precision machining environments
• Continuous operation under pressure

👉 The key engineering challenge of dual-passage rotary unions is media separation and sealing stability.
Each channel must maintain independent sealing while operating under rotation, pressure, and temperature variation.

👉 Poorly designed units often fail due to:

• Internal leakage between channels
• Seal wear caused by thermal stress
• Bearing instability at high speeds

📊 Technical Specifications

👉 Dual-passage rotary unions must maintain seal integrity under simultaneous multi-media flow, which requires precise engineering and material selection.

⚡ Key Features

• Dual independent passages for air and coolant
• Balanced mechanical seals for each channel
• Low-friction design to reduce heat generation
• High-precision bearings for stable rotation
• Labyrinth protection to extend service life
• Flange or threaded connection options

🏗️ Application Scenarios

The Dublin 2620 Series rotary union alternative is widely used in:

🏭 CNC Machining Centers

• Through-spindle coolant systems
• Tool clamping and unclamping systems

⚙️ Automation Equipment

• Rotary indexing tables
• Multi-channel fluid transfer systems

🔩 Precision Manufacturing

• High-speed rotating machinery
• Cooling and pneumatic integration systems

🚗 Automotive Production

• Automated machining lines
• Multi-function spindle systems

👉 In these applications, a dual-passage rotary union is essential for simultaneous cooling and pneumatic control, improving efficiency and reducing downtime.

🏭 EEAT Section

1. Real Manufacturing Experience

We are a factory-based rotary union manufacturer, not a trading company.

• 10+ years of production experience
• Exported to 30+ countries
• Long-term supplier for the CNC and automation industries
• Proven replacement experience for Deublin 2620 series

👉 Our designs are validated through real industrial applications

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2. Engineering-Based OEM Replacement

Most suppliers replicate dimensions only.
We focus on engineering equivalence:

• Independent channel sealing design
• Internal flow path optimization
• Bearing selection based on speed and load
• Thermal and pressure performance tuning

👉 This ensures stable dual-channel performance under real conditions

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3. Independent R&D Capability

Our engineering workflow includes:

• CAD modeling and tolerance analysis
• Seal pairing optimization (Carbon / SiC / Ceramic)
• Dynamic simulation (pressure/speed/media flow)
• Failure mode and lifecycle testing

👉 This allows us to deliver long-term reliability, not just compatibility

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4. Strict Quality Control

Each unit undergoes:

• Dynamic pressure testing
• Leakage testing for both channels
• Rotation balance testing
• Assembly precision inspection

👉 Ensuring consistent performance in CNC environments

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5. Advanced Customization Capability

We provide flexible OEM customization:

• Custom flange and connection types
• Multi-passage expansion (2–6 channels)
• High-speed or high-pressure upgrades
• Special materials for aggressive media

👉 Ideal for replacing non-standard or discontinued models

Advantage

Reduced Downtime

The robust design and low maintenance requirements of the Dublin 2620 Series minimize operational interruptions. Allowing for continuous production processes.

Enhanced Efficiency

By maintaining a consistent flow of air or coolant, these rotary unions contribute significantly to the efficiency of pneumatic systems. Resulting in improved productivity across applications.

Customizable Solutions

We offer a range of customizable options within the 2620 Series to meet specific application needs. Whether you require different rotor connections, the expert team is ready to assist.
The Dublin 2620 Series Air Rotary Union is the perfect solution for industries requiring reliable and efficient fluid transfer systems. With its advanced design, durable construction, and versatility across multiple media types, this rotary union ensures optimal performance in any application.

❓ FAQ

Q1: Can your product replace the Dublin 2620 Series directly?

Yes, it is designed for full interchangeability and equivalent performance.

Q2: What is the advantage of dual-passage rotary unions?

They allow simultaneous transfer of two different media, improving efficiency.

Q3: Do you support customization?

Yes, including multi-passage and high-performance upgrades.

Q4: What industries use this product?

CNC machining, automation, and precision manufacturing.

Q5: How do you ensure reliability?

Through strict testing and engineering optimization.