Preeflow® eco-DUO is a rotating and perfectly pressure-tight displacement system.Self-sealing rotor/stator design. Conveyance action by medium displacement in the stator through controlled rotor movement.

Safe conveyance without any modification of the medium. With its suck back option, preeflow® ensures clean and controlled material or medium cut-off while preventing post-dripping effects.



On-the-dot dosage with maximum volumetric precision – dot-and-bead application with application speeds adaptable to track speeds – joint sealing technology.



  • Electronic packaging • semiconductor • LCD/LED/OLED
  • Photovoltaic • medical • biological chemistry
  • Laboratory • optics and photonics • SMD/SMT



  • Genuine volumetric dosing • suck back effect
  • Viscosity-independent dosing • easy to clean
  • Primary pressure-independent dosing • controllable dosing flow
  • Pressure-tight no valve • range of dosing pressures up to 40 bar

About ViscoTec Asia

ViscoTec Asia Pte Ltd, a subsidiary of ViscoTec Pumpen – und Dosiertechnik Gmbh, is a sales office providing sales and technical support for dosing applications and solutions for the Asia market region. Established in 1997 and located in Germany,

Our Products in Action

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Video on 3D printing