Fine Dosing Valves

Rotodosers & Steridosers

Rotodoser is a Fine Dosing Valve designed for accurate DosingFine Dosing Valve - Rotodoser and consists of two concentric rotors of different volume individually operated, which determine product flow and dosing.

The main rotor ensures continuous product flow while the secondary rotor ensures accurate dosing. (Rotors can be customized)

Manufactured according to cGMP guidelines

Typical Applications

Feeding of packaging machines, drum and bag filling systems, dispensing



– Body Main rotor and secondary: Stainless steel EN 1.4404 (AISI 316L)
– Seals: Translucent Silicone, EPDM, FKM (Viton®)

Motion Drive:
– Pneumatic actuator (main rotor)
– Pneumatic or electric motor (secondary rotor)
– Pneumatic actuator (secondary rotor)

Ra 0.5 μm internal, 1.2 μm external

Declarations and Certifications
– FDA Certification (CFR § 177.2600),
– Material Certificate 3.1 as per EN10204

100-150-200-250-300 mm

Rotometering Valve

The Rotometering valve is a Fine Dosing Valve. It consists of two Rotometer - Fine Dosing Valvecoaxial dosing parts (independently actuated), which determine flow of the product and its dosage.

The  Rotometering  valve  is  particularly  suitable  for  process  where product does not flow easily: the auger screw movement allows the product to be physically transferred, favouring dosing.

This valve is an alternative to the Rotodoser valve (our fast feed and fine dosing valve), which shares with Rotometering an important part of its design: it consists of two coaxial dosing parts (actuated independently), which determine flow of the product and its dosage.



  • Parts in contact with product Stainless steel EN 1.4404 (AISI 316L)
  • Parts not in contact with product Stainless steel EN 1.4301 (AISI 304)Rotometer Rotor - Fine Dosing

Gasket Material

  • Silicone
  • EPDM
  • FKM
  • Conductive EPDM

Valves Sizes

  • 150mm
  • 200 mm

Declarations and Certifications

  • Material certificate EN 10204-3.1 for metallic parts
  • FDA 21 CFR 177.2600
  • Rotometer MainUSP class VI biocompatibility declaration (*)
  • Traceability report (*)
  • Roughness test map (*)
  • ATEX 2014/34/EU (*)

upon request


  • Parts in contact with product: Ra<0,5μm.
  • Other parts: Ra<1,2μm
  • Welds: completely grounded and polished
  • Electropolishing upon request
  • Other finishing upon request

Typical application
Weighing and packaging machines,  fine dosing in process machines.