Flowrate and Pressure Drop

Flow rate and Pressure Drop

Flow rates of liquids and drop in pressure of gases are functions of:

  • diameter of the filter
  • porosity of the filter
  • relation of pressure/vacuum in the apparatus
  • physical properties of the medium to be filtered.

To determine the possible application of glass filter-products and to choose the best apparatus for the work intended, it is necessary to know the flow rates of liquids and gases. Please use our diagrams 1 and 2 which are shown for water and air. The data applies to filter discs of 30 mm diameter with average properties and effective filter area according to thicknesses, as well as poresizes. The flow rates for other diameters can be easily calculated by multiplying this factor by the conversion factor. Minor deviations with very limited tolerances are possible. Strict control is recommended, especially when filtering bacteria using porosity 5.

 

Flow rates

 

Filter disc ø mm

10

20

30

40

50

60

90

120

175

Conversion factor   

0,13

0,55

1,00

1,50

2,50

4,30

 6,80

9,70

15,00

 

 

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