preeflow® eco-SPRAY High Precision Volumetric Dosing Unit, Spray Dispensing System

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About preeflow eco-SPRAY Spray Dispensing System

The preeflow eco-SPRAY spray dispensing system combines the reliable preeflow endless piston principle with a low-flow spray chamber, resulting in highly accurate spraying of low to high viscosity fluids with high edge definition. Based on preeflow’s proven rotor/stator dispensing technology, the eco-SPRAY provides superior process control.

This dispenser offers flexibility thanks to viscosity independence and a variable spraying pattern, as well as cost savings due to reduced waste and altogether higher process reliability than standard spraying technology.

The eco-SPRAY is capable of precisely nebulizing and spraying on either a continuous or intermittent basis. It offers a constant amount dispensed per area, uniform coating, and controllable round spray alongside technical features including defined quantity spraying, viscosity and primary pressure independent spraying and a controllable spray area.

preeflow eco-SPRAY set up with controllers

We can integrate the preeflow eco-SPRAY into any robotic dispensing system.

Features & Benefits

  • eco-SPRAY PCB board conformal coating applicationViscosity-independent spraying
  • Spraying of defined quantity, regardless of primary pressure
  • Controllable round spray area, with little overspray and high edge definition
  • Constant amount/area and consistent spray-image results in uniform coating
  • High chemical resistance allows a variety of media from low to high viscosity: grease, adhesives, ink, silicones, abrasive media, highly filled media, activators/primers
  • Low maintenance system which is easy to clean


  • Dosing
  • Greasing
  • Coating
  • Marking
  • Micro-nebulisation



Dimensions 228mm high, 35mm diameter
Spray accuracy ± 1%
Repeat accuracy > 99%
Min. spray quantity 0.05ml
Volume flow 0.5ml to 6ml per minute
Diameter 0.2mm, 0.3mm, 0.5mm
Material infeed 1/8″ cylindrical whitworth pipe thread DIN/ISO 228
Parts with medium contact HD-POM/Stainless Steel/PEEK
Min. operating pressure 0 bar, self-levelling fluid
Max. operating pressure 0 to 6 bar input pressure, non-self-levelling fluid
Intrinsic tightness Approx. 2 bar (reference medium approx. 10 mPas at 20° C)
Seals High-molecular PE, VisChem
Motor 18 to 24 V/DC, incremental encoder, planetary gears
Switching frequency Over 100 cycles/min
Operating conditions +10°C to +40°C, air pressure 1 bar
Medium temperature +10°C to +40°C, air pressure 1 bar
Medium viscosity Low to high viscosity media
Atomizer air 0.1 to 6 bar
Atomizer supply Hose connector external diameter 4mm (connection to the process M5)
Spray image Round spray (adjustable)
Spray angle 15 to 30°

Other Information

See also our Technical Articles and White papers page to download “The “Endless Piston” Pump – Technology for Precision Dispensing” – a whitepaper about this technology.

All Downloads

Filename Size Download
preeflow® eco-SPRAY Product Data Sheet 2.08MB
preeflow Microdispensing Brochure cover 2.42MB
The Endless Piston Pump Technology for Precision Dispensing 0.37MB

Ordering Information

Part number Description
VIS21448 preeflow eco-SPRAY
VIS21499 preeflow eco-SPRAY controller


Let’s start by talking about your application

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  • Last updated: November 2022
  • Version: 2.4

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.