rotating unions
rotating unions Refers to a mechanical device that allows fluid to be transmitted between rotating components, such as the rotary joint in a hydraulic system, which can prevent pipeline entanglement.
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.
The water-cooled rotary joint of the converter is a key sealing connection device used in the steelmaking converter in the steel smelting industry, mainly installed at the ear shaft of the converter. Its core function is to safely and continuously transfer fluid media (such as cooling water, argon gas, nitrogen gas, etc.) from static pipelines to the dynamically rotating converter system
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A flange type rotatable joint is a critical fluid dynamic sealing device used to transport fluid media (such as gas, liquid, oil, steam, etc.) from fixed pipelines to rotating or swinging equipment
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SD-G rotary joint is a mechanical sealing device used to transport fluid media (such as steam, water, thermal oil, air, etc.) from fixed pipelines to rotating or swinging equipment
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SH-G rotary joint (usually referring to the HS-G type in the H-series, which is a bi-directional flow, inner tube fixed rotary joint) is a precision sealing device designed specifically for industrial cooling and fluid transmission systems
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In the process of machine tool transformation and performance upgrade, the rotary union, as a key sealing device connecting the fixed fluid source and rotating components, directly determines the cooling efficiency, machining accuracy, and equipment life through its selection and application
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In the automatic fixture system of a vertical lathe, the Rotary Joint/Swivel Joint is a key sealing component that connects the stationary hydraulic/pneumatic source with the rotating worktable
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The "three liquid one gas" rotary joint belongs to a specific configuration form of multi-path fluid rotary connectors, usually referring to the integration of three independent liquid channels and one independent gas channel inside a compact joint housing
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Gap labyrinth rotary joint is a fluid transmission device that adopts non-contact sealing principle. It forms flow resistance through carefully designed multi-stage tortuous micro gaps between the rotating and stationary parts
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F90 swivel union is a DN90 dual-pass rotary joint with siphon structure. It transfers thermal media from stationary pipelines to rotating rollers, supporting continuous 360° rotation without pipe twisting.
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G25 swivel union is DN25 single-pass rotary joint. It connects stationary pipelines and rotating machinery, allowing 360° continuous rotation while transferring fluid and preventing hose twisting.
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Q32 swivel union is DN32 single-pass rotary joint. It connects stationary pipelines and rotating equipment, enabling 360° continuous rotation while conveying fluid without hose twisting.
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FF125 rotary union is a large DN125 dual-flow rotary joint, developed for heavy-duty heating roller systems. It delivers heat transfer media from stationary piping to rotating rollers while allowing continuous 360° rotation without line twisting.
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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