Fine dosing

Rotodoser is the solution designed for accurate dosing. It consists of two concentric rotors of different volumes individually driven that determine the flow and dosage of the product. The main rotor guarantees a continuous product flow, while the secondary rotor guarantees a high precision dosage. Rotodoser by Sterivalves is a valve designed to guarantee high versatility, in fact rotors are also customizable.


Actuation: Outer rotor

Pneumatic actuator for feeding

Actuation: Inner rotor

Electric or pneumatic gearbox for fine dosing


Quick Release System

Body & Rotor material

Stainless steel EN 1.4404 (AISI 316L)*


Internal mirror polish Ra <0.5 μm

External sanding Ra <1.2 μm


ND 100, 150, 200, 250, 300

Gasket material

Translucid silicone, white EPDM, conductive EPDM, FKM (Viton ®), PTFE

Body Material

Stainless Steel EN 1.4404 (AISI 316L)

Hastelloy® C22/C276

Low δ-ferrite Stainless Steel

Other types of stainless steel and resins available upon request

Gasket Material

Translucid silicone

White EPDM

FKM Viton ®

Inlet & Outlet Connections

Tri-clamp flange

SteriFlange with aseptic gasket

SteriFlange for Bayonet

*Available upon request

Body Style

Clamped body assembly

Motion Drive

Pneumatic actuator

Pneumatic motor

Electric motor

ATEX Rating


A = 1/2D, 1/2G

B = 1/3D, 1/3G

C = 2GD

D = 2/3GD

E = 3GD


Standard Internal Ra<0.5μm, External Ra<1.2μm


Welds: grounded and polished

Other finishing upon request

Control System

Inductive sensor switches

Position Cam

PLC Control Panel *

Certificates & Declarations

Material certificate EN 10204-3.1 for metallic parts

FDA 21 CFR 177.2600 or FDA 21 CFR 177.1550 for polymeric parts

Torque measurement test*

Traceability report *

Gas tightness test to EN12266-1, test P12*

Roughness test map *

USP class VI biocompatibility declaration*

CE declaration of incorporation as per Directive 2006/42/EC

Declaration BSE/TSE free for elastomers

Declaration Bisphenols/Phthalates free for elastomers*

ATEX 2014/34/EU *


Our valves are designed for each component to interlock with one another perfectly, creating a gapless match, and preventing the product from storing within, therefore averting product cross-contamination.

From metal powder to the delivery of the final product, we trace and document all events associated with each part and component, to provide full traceability for all our products. This is particularly important in the pharmaceutical and food industry, to assure the quality of production lines and trace down possible issues to quickly intervene and solve related problems.



Easy assembly and disassembly

No-tool installation and assembly

Reduces risks of external contamination

Reduces cleaning time




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