powder coating

Efficient powder coating processing

Powder coatings are solvent-free coating substances which are used in the high-quality industrial coating of surfaces. Requirement: easy cleaning, constant particle size distribution!
The basic principle of operation has hardly changed since the 1960s. By optimising our grinding and classifying technologies, we have always kept pace with the increasing quality requirements.

Grinding powder coatings with classifier mills from the ACM product line

The classifier mills ACM were developed to do justice to the often-voiced demand for minimal cleaning times in the production of powder coatings. The ACM EC (Easy Clean) and EC-CL (Classifier Direct Drive) are tailored to exactly these requirements. The use of the new E3 beaters achieves throughput increases of up to 20 % when compared to your current ACM classifier mill. Energy savings mean you can reduce your production costs to a minimum.

  • For demanding special products: high-efficiency cyclone-classifier (HECC) makes change-over from cyclone to classifier operation possible
  • For the dedusting of powder coatings containing titanium dioxide: TSP fine separator ensures maximum selectivity and thorough cleaning
  • Increase capacity and reduce energy consumption: with the new ACM impact elements (E3 beaters)


Explore more:  Case Study about use of E3 beaters at Karl Bubenhofer AG

The performance factors at a glance

ACM 2/5 10/15 20/25 30/40 60/75
Nom. airflow [Nm³/min] (5,5)/8,5 (15)/22,5 (30)/37,5 (45)/60 (90)/112,5
Rotor drive [kW] 3/5,5 15 22 37 55
Nominal capacity [kg/h] Batch / 140 375 625 1.000 1.875
Larger systems available on request.

  • More than 600 systems installed worldwide
  • "Easy Clean": especially suitable in the case of frequent product changes
  • Processing for a host of different powder coating characteristics
  • Compaction of ultrafines: in-line recycling possible

ACM system for manufacturing powder coatings

with a cyclone-classifier (optional) and cyclone


particularly easy to clean

The ACM EC (Easy Clean) was developed to meet the demands for minimum cleaning times. The mill housing is designed as a double chamber system. This means that 70 % of the parts can be easily removed for mill loading without tools.

Advantages of the new design:

  • Easy and quick change of the parts of the mill equipment to be cleaned
  • 80 % time saving during cleaning
  • Maximum accessibility
  • Cooling zone to reduce product buildup
  • Sound reduction


with innovative protection concept for small-batch powder coating production

The new classifier mill ACM 5 NEX offers the numerous advantages of a simplified design - and is ATEX-compliant and tested for explosion protection

  • Pressureless design due to the avoidance of effective ignition sources
  • ATEX-compliant and tested for explosion protection
  • Tested by the European certification company Bureau Veritas: no ignition with standard powder coatings
  • Reduced inspection and maintenance effort
  • Easy cleaning and minimal downtime
  • High cost efficiency

The cyclone classifier for efficient dedusting

change easily and flexibly

Alpine Classifier HECC

The high-efficiency cyclone classifiers (HECC) unite maximum coarse yield at efficient dedusting in classifier mode as well as optimised collection rates in cyclone mode.

Advantages of cyclone classifiers

  • automated lifting-swivelling device
  • Simple change between classifier and cyclone mode
  • No internal fittings and thus easy and fast cleaning

Advantages of cyclone classifiers in operation

  • Stepless reduction of the fines portion
  • Narrow particle size distribution
  • High precision of cut

The ultrafine classifier for maximum dedusting quality

for powder coatings containing titanium dioxide

Alpine Air Classifiert TSP

The TSP air classifier was specially designed for demanding classifying tasks. In addition to the highest selectivity, the focus was on aspects such as handling, safety as well as operating and installation costs.

All benefits at a glance

  • The critical fine fraction of <10 µm is <1% after the classifing process with the TSP
  • Product flow without back-mixing ensures a high quality of dedusting
  • The hinged housing enables optimal accessibility

  • Quick and easy cleaning when changing products minimizes downtimes

  • Especially suitable for toner and pigment sifting as well as for dedusting powder coatings containing titanium dioxide

  • Maximum precision of cut

Brochure powder coating
Brochure ACM E3 Beater

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Planning the entire process

It’s not just building a machine – we support your projects from consulting to maintenance.