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A rotary union may have only one bearing, but multiple bearing are much more common.

The manufacturing of plastic materials encompasses a wide variety of applications including cast film, blown film, foam, flexible and rigid sheet extrusion, single and multi-layer co-extrusion, blow molding, thermoforming, pelletizing, wire and cable, injection molding and winding.

In addition, rotary unions for air and hydraulic service are used in winding and injection molding applications.

Deublin Rotating Unions – Norman G Clark

Retrieved from ” https: Veublin processing equipment that use rotary unions include cooling conveyors, flaking mills, shredders, steam cookers, starch dryers, rotary cutters and roll-forming. Rotary unions may be used to transmit coolant, cutting oil, MQL, pressurized air in a bearingless or bearing supported configuration. Your deublih has been taken into account. In many cases the shaft will turn with the drum or roll. Your answer has been taken into account.

Coil is further converted in processing centers that require hydraulic unions for actuation of mandrels.

Rotating Unions are used in many manufacturing processes to cool, heat or transfer fluid pneumatic or hydraulic power. Roller bearings; such as ball bearings and tapered roller bearings; or non-roller bearings, like graphite bearings and bronze brushings, may be used in a rotary union.


Responding to ever-increasing speeds and pressures, Deublin Pioneered Extended Life Sealing ELS rotating unions offering outstanding performance under the toughest conditions, and can extend service life two to four times, depending on the severity of the application.

Rotary unions are used in all types of converting for water, steam, thermal oil, air or hydraulics. This stainless steel rotor is housed in forged brass and comes with 3 vent holes. Electro-hydraulic equipment used in mining operations employ rotary unions including shuttle cars and coal cars, drill heads, backhoes, clam shell cranes and drag lines. Rubber extrusion is similar to plastic extrusion, with rotary unions used to cool the extruder screw. Water unions are used to flush mud from the drill tip, and must withstand shock and vibration in this severe application.

DEUBLIN brass rotary unions

Prices are indicative only and may vary by country, with changes in raw materials prices or exchange rates. Seal types can vary from pusher-type end face mechanical seal, non-pusher type end face mechanical seal, lip seals, and o-ring seals. The Online Industrial Exhibition.

Designed with a monoflow structure, the unit has 3 vent holes within its forged brass housing. A rotary union will lock onto an input valve while rotating to meet an outlet. In smaller rotary unions the housing is stationary.

Rotating Unions

deublih Many assembly lines incorporate multiple rotary unions, because they are highly versatile and take up less space than other devices designed for a similar purpose. From Wikipedia, the free rotarj. Typical rotating unions feature deep groove ball bearings to support the rotating component against the stationary component and balanced, precision-engineered mechanical seals to seal the media flow.


Brakes, for example, use rotary unions to maintain a constant supply of pressurized brake fluid. The slab is formed into coil or sheet. Web offset and sheet printing equipment use many rotary unions on the ink vibrator and chill rolls.

Rotary unions also appear in automobiles and other machines that require constant supplies of lubrication, air, or other liquids in order for moving parts to run smoothly. This type of rotary rottary is often used in the manufacture of plastics and other petroleum products, for which multiple inputs may need to be streamlined, but kept separate.

Rubber tire plants use industrial mixersextruders, calendar train cooling stacks and rayon slashers to make tire cord. Our sales team are well placed to help you with your rotating union requirements, contact us with your enquiry via our contacts page.

In the case of a rotary union with multiple inputs, chambers separated by seals keep the materials from inadvertently mixing. Oil and petrochemical refineries use batch mixers, flaking mills, blenders and drying rolls that each require rotary unions.

Most rotary unions have more than one seal.