Alfa Laval

Membranes planes UF

The selection of ultrafiltration flat sheet membranes from Alfa Laval covers a broad spectrum of flux properties and molecular weight cut-off values. The membranes are used in an extensive range of processes applied in the food, beverage, dairy, biotech and pharmaceutical industries

ultrafiltration flat sheet membranes

Alfa Laval offers a wide range of flat sheet membranes for ultrafiltration (UF) with various molecular weight cut-off (MWCO) values and flux properties. The membranes are available in different series characterized by the nature of the membrane. Common for all series is the unique construction on either polypropylene (PP) or polyester (PE) suppport material which provides optimum cleaning conditions.

PP series

The PP series of flat sheet Alfa Laval membranes for ultrafiltration covers the membrane types GR, FS, RC, ETNA and UFX10pHt.

  • The GR membrane types are made of either polysulphone or polyethersulphone with MWCO values ranging from 100,000 to 2,000.
  • The FS membrane is made of fluoro polymer and has a MWCO value of 100,000.
  • The RC membrane is made of regenerated cellulose acetate with a MWCO value of 10,000.
  • The ETNA membrane types are made of composite fluoro polymer with 1,000 and 10,000 MWCO values.
  • The UFX10pHt membrane is characterized by being resistant to high pH values and temperatures. It is made of polysulphone, permanently hydrophilic and has a MWCO value of 10,000.

PE series

In the PE series of flat sheet Alfa Laval membranes for ultrafiltration you will find the RC10PE membrane which is made of regenerated cellulose acetate. This membrane has a MWCO value of 10,000.

UF Dairy series

The series of Alfa Laval flat sheet ultrafiltration membranes for the dairy industry is made of either polysulphone or polyethersulphone with MWCO values ranging from 20,000 to 5,000.

Avantages

  • Couvrent un large éventail de propriétés de flux, de tailles de pores, de valeurs de coupure de poids moléculaire et de capacités de rejet
  • Disponibles au mètre, sous forme de feuilles standard de 20 x 20 cm ou découpées en sections plates pour s'adapter à toutes les configurations de modules à plaques et cadres Alfa Laval
  • Livrées avec les anneaux de verrouillage et de passage nécessaires
  • Conviennent à une large gamme de processus
  • Fabriquées par le centre de membranes d'Alfa Laval

Fonctionnement

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Reverse osmosis (RO)

RO uses the tightest possible membrane in liquid separation. In principle, water is the only material that can permeate the membrane. All other materials (salts, sugars, etc.) will be unable to pass through.

Nanofiltration (NF)

NF is not as fine a separation process as reverse osmosis, and uses membranes that are slightly more open. Nanofiltration allows small ions to pass through while excluding larger ions and most organic components.

Ultrafiltration (UF)

UF involves using membranes in which the pores are larger and the pressure is relatively low. Salts, sugars, organic acids and smaller peptides are allowed to pass, while proteins, fats and polysaccharides are not.

Microfiltration (MF)

In MF, suspended solids, bacteria and fat globules are normally the only substances not allowed to pass through.