rotary joints
swivel union is a fluid dynamic sealing device that transports fluid medium from a fixed pipeline to a pipeline or equipment that rotates or swings at a certain angle. Its core function is to establish a reliable connection between the stationary supply channel and the dynamically rotating components, achieving 360° continuous and leak-free transmission of various media such as gas, liquid, and oil
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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DN large-diameter rotary joints are heavy-duty industrial rotary connectors designed for high-flow fluid transmission systems. Featuring oversized flow passages, excellent pressure-bearing capacity, stable low-torque rotation and enhanced integral sealing structure, these professional rotary joints support high-volume, uninterrupted delivery of water, oil and gas media, meeting large-flow operational demands of heavy industrial rotating equipment.
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QS-Y type rotary joint is a specialized fluid conveying component designed for the printing and dyeing industry and papermaking enterprises, mainly used for steam and hot water medium transmission in standard drying cylinders and other equipment
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SN steam rotary joints are professional high-temperature resistant rotary connection components specially designed for steam heat transmission systems. Featuring high temperature resistance, pressure durability, low friction rotation and reliable high-temperature sealing performance, these standard SN series rotary joints achieve stable, leak-free steam medium transmission, supporting continuous and efficient operation of various steam heating and industrial thermal equipment.
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The rotary joint of a wind turbine, commonly referred to as a hydraulic slip ring or fluid transmission joint in the wind energy industry, is a key precision component in wind power generation systems that enables continuous transmission of fluid media (such as hydraulic oil, coolant) and electrical signals between the stationary and rotating parts
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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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Hydraulic Rotary Joint is a crucial fluid transmission component in the fields of industrial automation and precision machining
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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
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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