Rotoflux S Series Large Capacity Universal Rotary Unions For Printing Machines

Description

The Rotoflux S Series rotary unions are specifically engineered for large-capacity fluid transfer in high-speed printing machines and industrial rotating systems. These rotary unions are designed to handle high flow rates while maintaining stable sealing performance, making them ideal for applications requiring continuous cooling, lubrication, or temperature control.

As a professional Chinese manufacturer specializing in rotary union alternatives, we provide high-performance replacement solutions for Rotoflux S Series rotary unions, offering equivalent operational reliability with faster delivery, flexible OEM customization, and competitive pricing.

Our products are widely used in flexographic printing machines, gravure printing lines, and other industrial equipment where large flow capacity and stable rotation are critical.

What Are Rotoflux S Series Rotary Unions

Rotoflux S Series rotary unions are large-capacity multi-passage or high-flow rotary joints designed to transfer fluids such as water, air, oil, or thermal media from stationary pipelines into rotating cylinders.

Key Functions:

• Deliver high-volume fluid flow to rotating rollers
• Maintain stable pressure and temperature control
• Enable continuous operation in printing systems
• Improve production efficiency and print quality

Specification	Details
Max Rotation Speed	Up to 100,000 RPM
Max Pressure	Up to 140 bar (2,030 PSI)
Media Compatibility	Emulsion, Oil, Water, Air, Oil-Air Mix
Seal Material	Silicon Carbide (hydrostatically released)
Housing Material	Precision Steel
Bearing System	Spindle or hybrid ball bearings
Flow Rate per Channel	15 - 50 L/min (depending on model)
Nominal Diameter	3.5 mm to 10 mm
Operating Temperature	Up to 265°C (509°F)

Key Technical Features

• Large flow capacity design for industrial applications
• Stable sealing system under continuous operation
• Optimized internal flow channels for reduced pressure loss
• High-speed rotation compatibility
• Modular structure for easy maintenance and replacement

You can pass air through the unit at a pressure of 10 kg and a speed of 4000 rpm; the system classifies it as either N-type or D-type.
You can also pass a vacuum at a pressure of 6.7 kg and the same speed of 4000 rpm, with options available in both N-type and D-type configurations.
For hydraulic oil, the unit handles a pressure of 50 kg at 4000 rpm and is also available in N-type and D-type variants.

RotoFlux equips the system with a graphite seal (standard seal) for vacuum and air cooling applications.
For hydraulic oil cooling, RotoFlux uses a D-type tungsten carbide seal designed specifically for heavy-load conditions.

Engineering Design & Performance Benchmark

Our S Series rotary unions are engineered to match the performance of original Rotoflux products:

• Fully interchangeable with Rotoflux S Series
• High-efficiency internal flow structure
• Reduced turbulence and energy loss
• Durable sealing system for long service life

👉 Designed for demanding industrial environments where reliability is critical.

OEM Manufacturing Capability

Professional Rotary Union Manufacturer in China

We are a direct factory specializing in rotary unions and rotary joints, with over 10 years of industry experience.

Our OEM Strength:

• Custom design based on drawings or samples
• Full compatibility with Rotoflux, Deublin, and other global brands
• Engineering support for application optimization
• Rapid prototyping and small-batch production

Production Facilities:

• Advanced CNC machining centers
• Precision grinding and surface finishing equipment
• Dedicated assembly lines
• Independent testing laboratory

Production Capacity:

• Monthly output: 5,000+ units
• Fast lead time: 3–7 days for standard models
• Custom orders: 7–15 days

👉 We support global OEM customers, distributors, and industrial end-users.

Full Lifecycle Quality Control System

Strict Quality Assurance from Raw Materials to Final Delivery

1. Incoming Material Inspection

• Certified alloy steel materials
• Imported bearings (SKF / FAG)
• High-performance sealing materials

All materials are tested and recorded for traceability.

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2. Precision Manufacturing

• CNC machining tolerance up to ±0.005 mm
• Surface roughness control for sealing faces
• Dynamic balancing for stable rotation
• Assembly accuracy verification

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3. 100% Final Testing

Each rotary union undergoes:

• Pressure testing
• Leak and sealing performance testing
• Rotational speed simulation
• Torque and friction testing
• Temperature rise monitoring

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4. Traceability System

• Batch tracking for all products
• Inspection records archived
• Test reports available upon request

👉 Ensures consistent quality and reliability across all deliveries.

Applications

Rotoflux S Series rotary unions are widely used in:

• Flexographic printing machines
• Gravure printing lines
• Laminating machines
• Paper and packaging equipment
• Textile and coating machinery

These applications require high flow capacity and stable fluid transfer during continuous operation.

Why Choose Our Rotoflux Replacement

Equivalent Performance – Better Value

• Same installation dimensions and performance
• 30–50% lower cost
• Faster delivery time
• OEM customization support
• Direct factory supply

👉 Reliable performance without the premium price

FAQ

Can this replace Rotoflux S Series rotary unions?

Yes, it is fully compatible in design and performance.

What industries use this product?

Mainly printing, packaging, paper, and coating industries.

What is the delivery time?

Standard models are available within 3–7 days.

Do you support OEM customization?

Yes, we provide full OEM and custom solutions.

Conclusion​

The Rotoflux s-serien Rotary Union is more than a component – it’s a strategic investment in operational excellence. With unmatched precision, rugged durability, and endless customization possibilities, it empowers industries to push the boundaries of what’s possible in fluid transfer. Trust the choice of leading engineers worldwide – choose the S Series for performance that never compromises.