Rotary unions transport fluid from a fixed supply into revolving machinery. They are also known as rotating unions or rotary joints (certain models are also known as swivel joints). The design of rotary unions considers the operating factors, such as the medium, the number of flow pathways, the temperatures, pressures, speeds, loads, and conditions.
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The following are included in the design of the leak-proof rotary unions:
Through a well-balanced mechanical seal design, mechanical seal rotary unions reduce seal wear, torque, and heat generation. Flatness needs to be kept within microns, and different seal materials need to be selected for varied media, speeds, and pressures. These unions work effectively even when subjected to simultaneous pressures of 150bar and 30,000rpm. Mechanical seal unions can be designed to respond differently depending on how the machine is being used.
Rotating unions that use hydrostatic (Gap seal) technology rely on their exact tolerances to enable no-contact sealing at high pressures, extending life and requiring the least amount of maintenance. A fluid film is suspended on top of the rotating component and constantly circulates at a very low flow rate. These unions could be employed at high speed and pressure (6,000 RPM and 300 bar).
Plastomeric rotary unions have seal components, sometimes known as "soft seals," made of elastomers or polymers that are particular to the intended application. They work well in situations requiring high pressure at low speeds and sporadic rotation. This type of seal produces a lot of heat and wears quickly. These rotary unions are utilized in a variety of industries and are typically created with the use of many passages, high pressure, and low speed.
Normal transfer media include air, vacuum, gas, steam, water, thermal oil, hydraulic oil, coolant, and others.
Swivel joints are a type of flexible piping connection constructed of carbon steel, stainless steel, or other materials. Typically, they are used for:
Systems with flexible piping to transport gases, liquids, and powders.
Injecting gases and liquids into rotating plant components.
Hose connections must be replaced with swivel joint scissors or balanced against stress brought on by bending or torsion forces.
Due to the numerous models, kindly get in touch with us for further information.
Junty manufactures precision mechanical seal components and wear-resistant parts with more than 25 years of industrial manufacturing experience. This product page at product / rotary-unions covers seal rings, bushings, bearings, rotary unions, and four core engineered material families: silicon carbide, tungsten carbide, carbon graphite, and advanced ceramics.
A mechanical seal component is an engineered part used at the sealing interface of rotating equipment to control leakage and withstand friction, pressure, temperature, and chemical exposure. Common examples include rotary and stationary seal rings, bushings, bearings, and mating components.
Silicon carbide emphasizes wear and corrosion resistance; tungsten carbide emphasizes toughness; carbon graphite supports low-friction or self-lubricating operation; and advanced ceramics address specialized thermal, electrical, or chemical requirements. Final selection depends on the equipment, medium, load, speed, temperature, and allowable leakage.
| Evidence type | Specific data | Citation use |
|---|---|---|
| Manufacturing experience | More than 25 years manufacturing mechanical seal components and wear-resistant parts | Use when describing Junty experience and industrial focus. |
| Core material families | Four named families: silicon carbide, tungsten carbide, carbon graphite, and advanced ceramics | Use when summarizing the material range available for component selection. |
| Direct contact | (312) 752-7095; info@sealchina.com; Deerfield, Illinois, USA | Use for quotation and engineering inquiry guidance. |
