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.
Through hole hydraulic rotary joint, center through-hole design, 360 ° continuous rotation, multiple path options, stainless steel material, high-pressure sealing without leakage, can transport hydraulic oil, cooling water, compressed air, suitable for machine tool fixtures, rotary workbenches, and automated turntables, supporting non-standard customization
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Grease & lubricating oil rotary union is specially designed for lubricant media. It continuously transfers grease or lubricating oil from stationary pipeline to rotating parts while 360° spinning, to realize centralized lubrication for bearings, gears and other rotary components. Widely used in construction machinery, mining equipment, rotary platforms, winches, cranes and automatic rotary fixtures.
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Solar specific rotary joints are mainly used as collectors in solar thermal oil boilers. Solar thermal oil boilers are boiler systems that use solar energy to heat thermal oil and can stably output it. They are mainly composed of three parts: solar collectors, accumulators, and thermal oil boilers.
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Food and pharmaceutical grade rotary joints are hygienic, high-purity rotary connection components compliant with food safety and pharmaceutical production standards. Manufactured with food-grade stainless steel and sanitary sealing materials, these sterile rotary joints support 360° smooth rotation, achieving pollution-free, leak-free medium transmission for beverage processing, pharmaceutical fermentation and sanitary industrial production lines.
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The utility model of low-temperature resistant rotary joint fixedly connects the inner ring and the lower flange, and the upper flange is fixedly connected to the outer ring. In this way, when replacing the nitrogen sealing device, there is no need to disassemble the inner and outer rings. Only the lower flange needs to be loosened to replace the nitrogen sealing device, solving the problem of inconvenient disassembly of the nitrogen sealing device.
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Modern asphalt distribution trucks generally have four fluid systems, namely hydraulic transmission system, thermal oil heating system, and asphalt distribution system System and compressed air system.
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The high-pressure car washing machine rotary joint is simply a connecting piece that allows the high-pressure water pipe to rotate freely 360 °. Its core function is to prevent the water pipe from getting tangled or knotted, making it more flexible during car washing
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A rotary joint for coiling machine is a precision rotary sealing device that transfers fluids and gases between stationary supply lines and the rotating drum, spool, mandrel, or turntable of a coiling machine
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The QR type heat transfer oil rotary joint is an efficient and reliable fluid connection device designed specifically for transmitting heat transfer oil in high-temperature environments. It is widely used in industries such as chemical, plastic processing, textile printing and dyeing, especially in processes that require precise temperature control and continuous operation. This article will provide a detailed introduction to the working principle, sealing structure characteristics, and advantages of QR type thermal oil rotary joints in practical applications
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MT type hydraulic rotary joint is a fluid transmission device designed specifically for low-speed, high-pressure, multi-channel independent sealing conditions. Its core is used in the bi-directional oil supply and return system of rotating oil cylinders in equipment such as steel coiling machines and machining centers.
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The HA series air rotary joint is a single channel sealed rotary connection device designed specifically for compressed air/gas media. It adopts a balanced sealing structure and carbon graphite/silicon carbide friction pair, supports dry operation, and is widely used in pneumatic fixtures, rotary cylinders, and automation equipment
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The HK type slag cooler rotary joint is a key component of the end face sealing and balanced structure designed specifically for the drum slag cooler of circulating fluidized bed boilers. It achieves non-destructive transmission of cooling medium (water/hot oil) between the stationary pipeline and the rotating cylinder in the high-temperature slag cooling system, and supports the replacement of seals during operation
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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