Air Vacuum Rotary Unions
Air Vacuum Rotary Unions

AIR VACUUM ROTARY UNIONS

RT-401-Series

  • 1 & 2-ports and tandem design
  • Self supported rotary union
  • Radial and axial housing connection
  • Aluminium housing available
  • Hard chrome plated steel shaft
  • Olite bearing for low speeds
  • BSP, Metric, UNF, NPT rotor thread available

Description

The Type RT-401 series is air and vacuum service rotary union generally used in automation industries. It has single, dual or tandem passages without mixing of media. It’s a special design having rotor of SS 316 and hardened with chrome. Provision with ball bearing in combination of micro lapped faces and composite bronze bearing in combination with Teflon bush design is available. They are provided with low rotation speed against high pressure and vice versa. They may remain inactive for long periods without seizing. Two or three passages can be applied without mixing of medias. Contamination of media do not take place in this rotary union.

We also manufacture and supply  Coolant Rotary Union, Multi Passage Rotary Union and Water Rotary Union as being topmost Rotary Union manufacturers in Mumbai as well as known as one of the most precise rotary Union manufacturing companies in India.

FAQ

An air vacuum rotary union is a rotary sealing device designed to transfer compressed air, vacuum, or other compatible media between a stationary supply and a rotating component without leakage. It is commonly used in CNC machinery, automation equipment, indexing systems, packaging machines, printing machinery, textile equipment, and other rotating applications where reliable air or vacuum transfer is required.

The correct air vacuum rotary union depends on factors such as media type, operating pressure or vacuum level, rotational speed, port size, connection type, shaft size, temperature, and mounting arrangement. For a proper selection, provide your machine details and existing rotary union specifications so the required size, sealing arrangement, and performance can be matched accurately.

Yes. Air vacuum rotary unions can often be manufactured or supplied as replacement alternatives for existing brands, provided the application and dimensions are compatible. If you share the existing rotary union model, drawing, dimensions, photographs, or machine details, a suitable replacement can be evaluated for fitting and operating requirements.

The pressure, vacuum capacity, and maximum rotational speed depend on the specific rotary union design, sealing system, size, media, temperature, and application conditions. Therefore, there is no single pressure or speed rating for every air vacuum rotary union. We recommend selecting the unit according to the actual operating conditions of your machine to ensure reliable sealing and service life.

Buying from an experienced rotary union manufacturer or supplier can help you obtain a unit matched to your machine rather than choosing only by nominal size. Application-based selection can help address leakage, premature seal wear, improper fitting, and compatibility issues. For replacement or new applications, technical details such as pressure, vacuum, RPM, port configuration, shaft dimensions, and operating environment should be considered before final selection.

Size

  • 1/8″ (DN06) to 1 1/2″ (DN40)

Parameter

  • Max. Pressure (air): 10 bar
  • Max. Pressure (vacuuum): 0.07 bar or 7 kPa
  • Max. Temperature: 120ºC
  • Max. Speed: 250 RPM
  • Note: Do not work with max. pressure at max. speed.

Seal Faces : Cabon, SiC and TC
Elastomer : Viton, Neoprene, EPDM, NBR and Buna-N
MOC : SS 316, Brass, Aluminium, Carbon Steel.

Low speed and low pressure application
Low speed and high pressure application
High speed and moderate pressure application