Flow Rate Conversion Factors
The following multipliers must be used whenever a Filterworld filter housing is being used at a working pressure other than the reference figure stated in the price list.
The maximum working pressure for every Filterworld product is stated in the full price. The full price list contains other relevant technical and statutory information as well as a copy of Filterworld Limited terms and conditions of sale. Please contact Filterworld for a paper copy, pdf copy or CDROM copy of this price list and we shall make arrangements for this to be sent to you, either directly or via one of our distributors. Filterworld Limited expressly prohibits the use of any of its products for a duty that exceeds the stated working pressure, working temperature or other limits that may be imposed in the full price list or any other Filterworld technical publication.
Table 1: Standard Pressure Filtration with a reference flow rate of 7 barg
Actual pressure (barg) |
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0.5 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
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Multiplier |
0.18 |
0.25 |
0.38 |
0.5 |
0.63 |
0.75 |
0.88 |
1 |
1.12 |
1.25 |
1.37 |
1.49 |
1.62 |
1.74 |
1.86 |
1.98 |
2.1 |
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Table 2: High Pressure Filtration with a reference flow rate of 350 barg
Actual pressure (barg) |
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17 |
18 |
19 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
150 |
200 |
250 |
300 |
350 |
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Multiplier |
0.11 |
0.12 |
0.13 |
0.14 |
0.2 |
0.26 |
0.32 |
0.37 |
0.43 |
0.48 |
0.53 |
0.58 |
0.77 |
0.9 |
0.98 |
1 |
1 |
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Table 3: Vacuum Filtration with a reference flow rate of atmospheric pressure
Absolute Pressure (millibar) |
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10 |
50 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
1000 |
1013 |
|
Multiplier |
0.01 |
0.05 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1 |
1 |
Examples:
A standard ported aluminium filter type 01FW17 has a stated flow capacity of 102 Cu.M/hr at 7 barg. What can the filter flow at 5 barg?
From table 1 we can see that the multiplier for 5 barg will be 0.75. This means that the maximum recommended flow through this housing at 5 barg will be 102 x 0.75 which is 76.5 Cu.M/hr.
A vacuum protection filter type VPFW85 has a stated flow capacity of 163 scfm at atmospheric pressure. What can the filter flow at a working pressure of 100 millibar?
From table 3 we can see that the multiplier for 100 millibar is 0.1. This means that the maximum recommended flow through this housing whilst it is operating at 100 millibar is 0.1 x 163 scfm which is 16.3 scfm.
A high pressure filter type 01H3575 has a stated flow capacity of 265 scfm at 30 barg, What can the filter flow at 40 barg?
From table 2 we can see that the multiplier for 40 barg will be 0.26. This means that the maximum recommended flow through this housing at 40 barg will be 265 scfm x 0.26 which is 68.9 scfm.