Filter Pressure Test (FPT)

The OCS Filter Pressure Test (FPT) determines the Filter Pressure Value (FPV), i.e. the pressure rise measured over time upstream of the screen filter as an indication of the melt purity or dispersibility of added colour pigments. The OCS Measuring Extruder (ME) melts and homogenises the test material, which is then delivered to the filter via a melt pump at a defined and constant volume flow. The increasing pressure of the polymer melt is displayed, continuously recorded and finally evaluated.

Testable Raw Materials

  • Pellets


  • Pressure and melting temperature measurement
  • Simple sieve change
  • Data recording and evaluation using OCS Filter Test Software
  • Fulfilment of DIN EN 13900-5

Compatible with

  • OCS Measuring Extruder (ME)

Sales Team

T +49 2302 95622-0
F +49 2302 95622-33


OCS Optical Control Systems GmbH
Wullener Feld 24
58454 Witten

Technical Details

Barrel diameter
20, 25, 30 mm (3 heating zones with thermocouples for barrel, 4 additional heating zones for melt pump and adapter, 3 cooling zones with low-pressure blower)
Screw compression
1:1, 2:1, 3:1, 4:1, with and without mixing zone (others on request)
0–150 rpm

Similar Products