Rotary Unions

Rotary Union

Rotary Union is a fluid dynamic sealing device that transports fluid media (such as liquids, gases, steam, etc.) from fixed pipelines to rotating or swinging pipelines and equipment at a certain angle. Its core function is to ensure continuous transmission of the medium while preventing medium leakage, series connection, or external pollution, achieving a closed connection under 360 ° unrestricted rotation.

Rotary Union
Precision Rotary Joints & Unions for Industrial Fluid Transfer

Choose any application — steam, water, oil, air, or chemical — and we’ll engineer the perfect rotary joint solution for you.

Below are our most trusted rotary joint series, available for standard or custom-engineered orders. As a manufacturer specializing in precision rotary sealing technology, SD SWIVELES Engineering Co., Ltd. brings together a dedicated team of certified mechanical engineers, application specialists, and production experts, each with decades of hands-on experience in the R&D of fluid transfer systems for paper, steel, rubber, plastic, and chemical processing industries.

2620-500-252 rotary joint

2620-500-252 rotary joint

The 2620 series high-speed rotary joint is a reliable dual channel rotary joint designed specifically for high-speed rotating machine tool...

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967-950 swivel union

967-950 swivel union

High speed spindle center water outlet rotary joint: a fluid medium conveying product developed using a "detachable seal" structure, deep...

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2620-042-940 swivel unions

2620-042-940 swivel unions

2620-042-940 is a dual channel high-speed gas/liquid rotary adapter designed specifically for cold operation and dual channel same medium transmission...

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2620-000-157 swivel unions

2620-000-157 swivel unions

Optimize your machinery with 2620-000-157 swivel unions for efficient fluid power transmission. Connects with hydraulic and hose fittings for versatile,...

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Hydraulic swivel unions

Hydraulic swivel unions

Hydraulic rotary joint is a rotary sealing device used to transmit fluid media in low-speed and high-pressure hydraulic systems. It...

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Cooling water swivel unions

Cooling water swivel unions

Designed for assemblies that require smooth rotation and dependable connection performance, the a10-1772-05l swivel union helps reduce hose stress, simplify...

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A10-1772-05L swivel unions

A10-1772-05L swivel unions

the a10-1772-05l swivel union helps reduce hose stress, simplify installation, and support consistent fluid or air transfer in compatible systems

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high speed swivel union

high speed swivel union

High speed rotary joints, whose "high-speed type" mainly refers to high-speed rotary joints that are suitable for CNC spindle center...

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B10-1717-05L swivel unions

B10-1717-05L swivel unions

B10-1717-05L is a B-series high-speed, dry running rotary joint designed specifically for machine tool spindle coolant/air transmission. It supports automatic...

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Why SD-SWIVELES

Precision Rotary Joints · Quality Driven Innovation

From precision machining to seal testing, every step follows international standards (ISO 9001, CE, ATEX) — delivering reliable fluid transfer solutions for paper, steel, chemical, rubber, and plastics industries.

Precision Machining · Micron Tolerances

High-precision CNC machining centers with micron-level tolerances ensure rotational stability and seal integrity, even at high speeds and demanding operating conditions.

High-Performance Materials · Corrosion Resistant

316L stainless steel, alloy steels, silicon carbide, and carbon graphite — selected for maximum corrosion resistance, wear resistance, and compatibility with steam, hot oil, water, and air.

Advanced Sealing · Low Leakage · Long Life

Balanced seal design with silicon carbide/graphite seal rings delivers ultra-low leakage rates under high-temperature and high-pressure conditions, ensuring extended service life and reduced maintenance.

Engineering Experts · Custom Solutions

20+ years of rotary joint engineering experience — offering customized design, sizing guidance, material selection, and on-site technical support for your specific application.

Production Excellence

Production Excellence & Quality Assurance

SDSWIVELES integrates 20 years of engineering experience with German-inspired quality management systems to form a standardized production process for precision rotary joints.

Standardized Production Process

Every rotary joint undergoes a documented manufacturing sequence: precision CNC machining, seal face lapping, assembly, and final inspection. Each unit is traceable with individual quality records and serialized documentation.

Independent Quality Inspection

Our quality department operates with full independence and authority to halt production if standards are not met. Dimensional tolerances are verified to ±0.01mm, and all units are pressure-tested to 1.5x working pressure before shipment.

Batch Consistency & Reliability

Triple validation: "dimensional reports + material certifications + performance test records." Product qualification rates remain stable above 99%, eliminating performance variations and ensuring long-term operational reliability.

Tailored Solutions

Solutions for Every Industry & Application

In the dynamic world of industrial manufacturing, every operation faces unique challenges. At SDSWIVELES, we tailor our engineering expertise to empower your success.

Established Manufacturers

We help you optimize existing equipment with upgraded rotary joint solutions that reduce downtime, improve energy efficiency, and lower maintenance costs. Whether you need to replace aging components, enhance performance while meeting stricter industry standards, or adapt to evolving production demands — we deliver solutions that keep your operations running.

OEM & Machine Builders

Stand out in a competitive market with custom-engineered rotary joint solutions that integrate seamlessly with your equipment designs. We support custom connection configurations, material specifications, compact form factors, and performance validation — helping you deliver reliable machinery to your customers.

Startups & New Ventures

Turn your engineering concept into reliable, production-ready hardware with our end-to-end partnership. From application analysis, material selection, prototyping, manufacturing oversight, to compliance testing — we guide you through every step of your journey from idea to implementation.

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