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Membrane Filter Elements
22 Operating Manual Status: 06/2001/01
Example 2 for calculating the closing forces:
Filter element type KMZ 1200 bloc-PP/PP
Size 1200 mm x 1200 mm
• Values:
- Filtering surface A
F
= 2.397 m² (from data sheet)
1
- Total area A
G
= 1.2 m x 1.2 m = 1.44 m²
- Operating temperature 60 °C
- Maximum permissible filtration pressure from Graph 11 (page 62)
p
F
= 5.8 bar
- Maximum permissible squeeze pressure from Graph 14 (page 63)
p
N
= 12.6 bar
- Now a lower operating pressure is selected here
p = p
N
= 8 bar
- Closing force from the graph on page 56
F
min
= approx. 1210 kN
F
max
= approx. 1340 kN
• Calculation of the closing forces:
F
min
= 0.5 x 2.397 m² x 8 x 100 x 1.3 = 1246.5 kN
F
max
= 1246.5 kN + (1.44 m² - 0.5 x 2.397 m²) x 0.5 x 8 x 100
F
max
= 1343.0 kN
1
You can obtain the relevant data sheets from LENSER.