The classification of swivel unions includes: water type, steam type, oil type, pneumatic type, special medium type, and so on
Swivel Unions is a fluid dynamic sealing connection device, whose core function is to transport media (liquids, gases, steam, etc.) from fixed pipelines to equipment that rotates or swings continuously 360 ° without leakage.
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 high-speed rotating joint at the center of the machine tool spindle is a key sealing device that accurately delivers static high-pressure coolant to the interior of the high-speed rotating spindle. Its core function is to achieve fluid leak free transmission at high speeds, directly cooling the cutting point of the tool.
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High pressure direct hydraulic rotary joint is a precision mechanical sealing device used to transmit high-pressure fluid media (such as hydraulic oil, water, steam, etc.) between fixed pipelines and rotating equipment
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As a key equipment for precision hole machining, the core function of the vertical CNC hinge honing machine is to perform high-precision size correction and surface smoothness improvement on the inner hole of the workpiece through the composite action of rotation and reciprocating motion
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CNC vertical lathes, the clamping and releasing of automated fixtures usually rely on hydraulic or pneumatic system drive. Due to the need for high-speed rotation of the spindle while the external pipeline remains stationary, reliable transmission of fluid medium from the stationary part to the rotating part must be achieved through a rotary joint
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In industrial automation, heavy machinery, and precision machining equipment, hydraulic systems often need to achieve 360 ° continuous rotation or reciprocating swing, while delivering high-pressure fluid to multiple actuators (such as hydraulic cylinders). Traditional single channel rotary joints cannot meet the complex motion requirements
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Oil film sealed high-speed and high-pressure multi station rotary joint is an advanced fluid dynamic sealing device designed to solve the medium transmission problem between fixed pipelines and rotating equipment under extreme working conditions
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Gap sealed oil and gas multi station rotary joint is a high-precision fluid dynamic sealing device specifically used to transport fluid media (such as hydraulic oil, gas, coolant, etc.) from fixed pipelines to rotating or swinging components
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High Speed High Pressure Multi Channel Rotary Union is a precision mechanical sealing device used to transport fluid media (liquids, gases, steam, etc.) from fixed pipelines to rotating equipment under dynamic rotating conditions
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Due to the high rotational speed of the vertical spindle and the need to simultaneously transmit hydraulic oil (for clamping/loosening) and compressed air (for blowing chips or auxiliary actions), high-speed and high-pressure multi-path rotary joints have become key sealing devices for connecting fixed pipeline rotating components
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Rotary Union, commonly known as "hydraulic slip ring" or "fluid rotary connector" in the wind power industry, is a core and critical component in the pitch system of wind turbines. Its main function is to achieve continuous and leak free transmission of fluid media
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Machine tool fixture multi station rotary joint is a precision sealing component used to transfer fluids (such as hydraulic oil, coolant, compressed air) from stationary parts to moving parts during rotation or indexing processes
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Machine tool fixture rotary joint is a key fluid dynamic sealing device, mainly used to transport media such as hydraulic oil, compressed air or cutting fluid from the fixed pipeline of the machine tool to the rotating or swinging spindle and fixture components
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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