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The TBMA M-AX en R-AX drop-through valves are specially designed for standard applications with limited differential pressure.  These valves are used for dosing of non-abrasive materials under cyclones or filters and in low-pressure pneumatic transport systems.

The M-AX valves are available in six sizes and are equipped with round connecting flanges.

The R-AX are equipped with a round and a square connecting flange. This allows the valve to be used as a transition piece from round to square or vice versa. This is favourable for the installation height and saves any mounting parts. The R-AX valves are available in five sizes.

Are you looking for a rotary valve? Use our Rotary Valve Specification Form as a guide to ask for a quotation and send it to We will contact you asap.


TBMA industry applications M-AX R-AX drop through rotary valves

In brief

  • Dosing of powders and granules
  • For standard applications with limited differential pressure
  • Closed bearings, dust-tight and sealed for life
  • Suitable as transition piece from round to square and vice versa (R-AX)
  • Differential pressure 1 barg
  • ATEX 2014/34/EU certified (optional)


  • Flange sizes: DN150 - DN350
  • Flanges: drilled in accordance with PN10
  • Rotor volume M-AX: 2,5 tot 58 ltr/rev
  • Rotor volume R-AX: 2,5 tot 34 ltr/rev
  • Differential pressure: 1 barg
  • Standard design temperature: 80 °C


  • Corrosion resistant version for chemically aggressive products (3C/3N)
  • Abrasion resistant version for abrasive products (4C/4TCO)

More info

Brochure Rotary Valves View

Dimensions M-AX View

Dimensions R-AX View

Air leakage diagram M-AX | R-AX View

Rotary Valve Specification Form View


Curious when to use the above system? Have a look at our selection of industries for a suitable application of this system and of our other products.

Looking for a more specific industry and/or application? We are happy to take on the challenge! Contact us at



TBMA are specialists in the design and supply of components and systems for bulk solids handling. Our extensive range of high quality processing equipment is suitable for handling powders and granules with proven reliability in practice in a variety of processing industries. The highly qualified and experienced TBMA staff are well able to translate your requirements into the right execution and application of our components. We also offer the design and execution of complete projects, thus providing you with an efficient, reliable and sustainable solution for your process.

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