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Membrane Filter Elements
20 Operating Manual Status: 06/2001/01
Example 1 for calculating the closing forces:
Filter element type KMZ 470 bloc-PP/PP
Size 470 mm x 470 mm
• Values:
- Filtering surface A
F
= 0.324 m² (from data sheet)
1
- Total area A
G
= 0.47 m x 0.47 m = 0.2209 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
- Actual, maximum operating pressure
p = p
N
= 12.6 bar
- Closing force from Graph 1 (page 52).
F
min
= approx. 260 kN
F
max
= approx. 300 kN
• Calculation of the closing forces:
F
min
= 0.5 x 0.324 m² x 12.6 x 100 x 1.3 = 265.4 kN
F
max
= 265.4 kN + (0.2209 m² - 0.5 x 0.324 m²) x 0.5 x 12.6 bar x 100
F
max
= 302.5 kN
1
You can obtain the relevant data sheets from LENSER.