Products > MONTZ Structured Packings > Fabric Packing Type A3
Wednesday, 26-09-2018

MONTZ Fabric Packing Type A3

Special-fabric packing for separation of thermally unstable substances under vacuum

MONTZ-Pak Type A3 satisfies particularly the special demands posed by the separation of thermally unstable substances under vacuum conditions.  This becomes possible primarily through a special fabric with excellent wetting characteristics by capillary effect, which form the packing layers in the shape of rippled disks.  This packing type also works very well for very small quantities of liquid loads due to low pressure losses and high separation efficiencies.


  • Particularly suitable for vacuum columns
  • Very small liquid loads (< 100 l/m²h) are possible
  • Lowest pressure drop per theoretical separation step
  • High separation performance through good wettability of packing surface
  • Capillary effect of special fabric


Areas of application are mainly in the separation of thermally unstable substances, which can be fractionated in vacuum of e.g. 0.5 mbar.

  • Distilled oils
  • Isomer mixes
  • Fatty acids
  • Fatty alcohols
  • Deodorizing of salad oils
  • De-gassing of transformer oil
  • Pilot columns
  • Vitamins

Separation steps:

  • Depending on packing surface 5 up to 20 theoretical separation steps per meter can be achieved when using well-wetted mixes in technical columns.

Available packing types:

Pak Type Specific surface
A3-500 500 m²/m³
A3-750 750 m²/m³
A3-1000 1000 m²/m³
A3-1200 1200 m²/m³
A3-1500 1500 m²/m³
A3-1900 1900 m²/m³

Additional packing types / surfaces are available upon request

Column data:

  • Diameter from app. 20 mm up to 7 m and wider
  • Very low liquid loads (e.g. 20 l/m²h)
  • Very low operating pressures (e.g. 0.5 mbar)
  • Minimum liquid hold-up

Inclination angles of wave channels:

  • Standard version at 60°
  • 45° or other angles upon request


  • Stainless steels such as 1.4306, 1.4404, 1.4571, 1.4435, 1.4539, and others
  • Hastelloy C4, C22, C276, etc.
  • Aluminium, Copper, Titanium, Monel
  • Additional materials are available upon request


  • Packing layers are manufactured individually or in segments. Packing installation is done through column shell flanges or manholes, as desired.

Separation performance curves and pressure drop curves:


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