Rotary Unions
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.
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.
High pressure rotary joint for CNC machining center, rated speed 3000r/min, 21MPa, suitable for hydraulic oil, working temp -20℃~+80℃. Precision rotary union for spindle hydraulic transmission, leak-proof, stable for high-speed machine tool operation.
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Discover high-voltage quick connectors designed for EVs and industrial machinery. Features IP67 waterproofing, up to 500A current capacity, and HVIL safety mechanisms. Ensure reliable, spark-free power transmission in harsh environments.
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High speed split rotary joint for machine tool coolant, high pressure & high speed rotating union, separate shaft and housing structure, reliable sealing for spindle cooling applications.
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The high-speed rotary joint of a centrifugal pump is a single pass high-speed rotary joint with an anodized blue aluminum alloy shell. It is mainly used to match the centrifugal pump and high-speed spindle, and is used to deliver cooling/lubricating media to the rotating pump shaft.
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Central outlet high-speed rotary joint for CNC machine spindle coolant & MQL. Balanced mechanical seal, anodized aluminum housing, stable at high RPM, low leakage. Custom thread sizes available for deep hole drilling & machining centers.
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High speed pneumatic rotary joint rated at 3000 rpm. Reliable rotary union for compressed air, stable sealing under medium-high speed rotation. Compact structure, easy installation for automated machinery and rotary workstations.
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BT50 special rotary joint for machine tool spindle. High-speed rotary union delivers coolant through BT50 spindle. Stable sealing, long service life, suitable for CNC lathe and machining center through-coolant spindle.
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Custom rotary joint matched with gap sealing oil cylinder. Multi-channel hydraulic rotary union, stable sealing under high pressure, transmits hydraulic oil while rotating. Suitable for heavy machinery hydraulic cylinder rotary connection.
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Premium asphalt distributor rotary joints for bitumen spreader trucks. Heavy-duty swivel union with reliable dynamic seals, handles high temp asphalt & heat transfer oil. Reduce pipeline torsion and leakage for road construction equipment.
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High-speed multi-path rotary joint enables multi-channel fluid transfer. High RPM up to 8000r/min, working pressure up to 10MPa. Works with water, hydraulic oil, air and coolant. Flange type rotary union for industrial rotating machinery.
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90 degree universal rotating flange elbow, double flange flexible joint elbow, adjustable 360 ° rotation, carbon steel welding, pressure resistant and leak proof. Used for water supply and drainage, sewage treatment, and chemical pipeline turning, with complete specifications and support for customization. Directly supplied by the manufacturer
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979-890 swivel union, high-speed rotary joint for coolant & MQL applications. Precision mechanical seal, compact structure, stable leak-free performance for machine tool spindle cooling.
detailFrom 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.
High-precision CNC machining centers with micron-level tolerances ensure rotational stability and seal integrity, even at high speeds and demanding operating conditions.
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.
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.
20+ years of rotary joint engineering experience — offering customized design, sizing guidance, material selection, and on-site technical support for your specific application.
SDSWIVELES integrates 20 years of engineering experience with German-inspired quality management systems to form a standardized production process for precision rotary joints.
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.
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.
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.
In the dynamic world of industrial manufacturing, every operation faces unique challenges. At SDSWIVELES, we tailor our engineering expertise to empower your success.
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.
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.
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.
Get expert guidance on the right formulation for your brand — standard or custom-engineered, with low MOQ and free sample support.
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