The ViscoTec eco-PEN450 dispensing system is a rotating and perfectly pressure-tight displacement system ideally suited for dispensing precise volumes of low- to medium-viscosity materials. This dispensing pen has a self-sealing, rotor/stator design. Conveyance is by medium displacement in the stator through tightly controlled rotor rotation, assuring accurate dispensing without any changes to the dispense material. The progressive cavity mechanism exhibits minimal shear stress upon the medium compared to alternative positive displacement platforms such as gear pumps, auger pumps, and rod driven metering systems. In addition, the suck-back feature of the eco-PEN450 ensures clean and controlled material or medium cut-off, while preventing post-dripping. It offers maximum volumetric precision for both dot and bead applications. Application speeds are adaptable to track speeds provide precise joint sealing.

Suitable to dispense low to medium viscosity materials including UV light-curable adhesives, greases, inks, medical fluids. Typical applications include microdots, dots, beads, and potting. 



  • Genuine volumetric dosing
  • Viscosity-autonomous dosing
  • Primary pressure-independent dosing
  • Pressure-tight without valve
  • Suck-back feature for clean shut-off
  • Easy to clean
  • Controllable dosing flow
  • Range of dosing pressures 16 – 20 bar

System Specifications

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Property Specifications
Dimensions Length 210 mm, 29 x 29 mm, ∅ 33 mm
Weight Approximately 410 gram
Material infeed 1/8 in cylindrical whitworth pipe thread DIN/ISO 228
Material outfeed Luer lock with o-ring, patented
Minimum operating pressure 0 bar, self-leveling fluid
Maximum operating pressure 0 to 6 bar input pressure, non-self-leveling fluid
Maximum dosing pressure 16 to 20 bar
Intrinsic Tightness¹ Approx. 2 bar (reference medium approx. 10 mPas at 20°C)
Parts in contact with the media HD-POM / stainless steel
Seals High-molecular PE, Vischem
Static seals Viton o-ring (medium) NBR (dust)
Motor 18 – 24 V DC, incremental encoder, planetary gears
Operating conditions +10°C to +40°C, air pressure 1 bar
Medium temperature +10°C to +40°C
Storage environment Dry & dust-free, -10°C to +40°C
Approximately dosing volume per revolution 0.05 milliliters per revolution
Accuracy of dosing² ± 1%
Repeat accuracy > 99%
Minimum dosing quantity 0.004 millilitres
Volume flow³ 0.5 to 6.0 milliliters per minute
¹ Max. dosing pressure and intrinsic tightness will decrease in direct proportion to a decrease in viscosity and increase in direct proportion to an increase in viscosity. Please contact Dymax Application Engineering for more information.
² Volumetric dosing as absolute deviation in relation to one dispenser revolution. This depends on the viscosity of the dosing medium.
³ Volume flow depends on viscosity and primary pressure.

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eco-PEN450 dispensing valve

Global (CE Marked)

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