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What Is a Rotary Union?

What Is a Rotary Union?
A rotary union unit is an mechanical part which allows transfer fluid(under pressure or vacuum) from a stationary structure to a rotating interface, preserving and isolating the fluid connetion. Rotary unions can be used in any mechanical system which requires unrestrained, intermittent or continuous rotation while transmitting gas, air, hydraulic, hot oil, MQL etc. They are available in a variety of configurations, connection types and materials to meet most applications. It also can improve mechanical performance, simplify operation system. In case you're interested in rotary unions, click here.

Primary Components Of Rotary Unions
what is a rotary union


Media Type
what is a rotary union

  • +Water
  • +Steam
  • +Oil
  • +Coolant
  • +Gas
  • +MQL
  • +Vacuum
  • +Chemical

Rotary Union Applications
Typical application include construction machinery industry, electronics industry, machine tool industry, packaging industry, rubber/plastics machinery, food/health/chemicals industry and etc.

Operating Parameters
Operating Speed: In general, speeds range from 0 to 1000rpm, some special high speed rotary union can top to 8000rpm.
Temperature: The temperature of application for rotary union from -40┬░ C to 220┬░ C.
Pressure: Normal pressures range from 0 to 700 BAR, and some slecial rotary union pushing the extremes of 2000 BAR.