Method for in-line control of the integrity of a filtering system
First Claim
1. A method for in-line control of the integrity of a filtering system implemented in an industrial process involving the filtration of a gas through said filtering system, wherein the industrial process is an industrial process for which said filtration is a sterilizing filtration, said filtering system (F1;
- F2) comprising at least one filtering cartridge, the method comprising at least the following steps;
a measuring step (S1) during which a pressure difference Δ
P, representative of the pressure loss generated by the filtering system (F1;
F2), is measured,a testing step (S2, S3) during which said measurement (S1) is compared to a predetermined upper threshold (Sh) and a predetermined lower threshold (Sb), in such a way as to consider said at least one filtering cartridge to be non-compliant when the pressure difference measured in the measuring step (S1) falls outside a range located between said upper threshold (Sh) and said lower threshold (Sb)said method comprising a preliminary step (S01) for measuring the pressure difference Δ
P0 representative of the pressure loss generated by the filtering system when said at least one filtering cartridge is new, and a calibration step during which a calculation is notably used to determine said upper threshold (Sh) and the lower threshold (Sb) depending on said pressure difference Δ
P0 measured,wherein the measurement of the pressure difference made during the measuring step (S1) is performed by means of a pressure difference measuring device having sensitivity of 5% or less of the value Δ
P0 representative of the pressure loss generated by the filtering system when said at least one filtering cartridge is new,Wherein Δ
P0 being the pressure loss generated by the filtering system when said at least one cartridge is new, and wherein the value of the lower threshold (Sb) is between 0.7*Δ
P0 and 0.95*Δ
P0 and wherein the value of the upper threshold (Sh) is between 1.3*Δ
P0 and 3*Δ
P0, and wherein the state of integrity of said at least cartridge in the sense that the filtered gas are considered sterile is implemented by monitoring only pressure difference Δ
P, representative of the pressure loss generated by the filtering system (F1;
F2).
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Abstract
A method for in-line control of the integrity of a filtering system implemented during an industrial process including the filtering of a gas through the filtering system, the filtering system including at least one filtering cartridge, the method including at least the following steps: —a measurement step (S1) which involves measuring a pressure difference ΔP representative of the pressure loss caused by the filtering system (F1; F2), —a testing step (S2, S3) which involves comparing the measurement (S1) with a predefined high threshold (Sh) and a predefined low threshold (Sb), in such a way as to consider the at least one filtering cartridge to be non-compliant when the pressure difference measured in the measurement step (S1) falls outside a range located between the high threshold (Sh) and the low threshold (Sb).
4 Citations
13 Claims
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1. A method for in-line control of the integrity of a filtering system implemented in an industrial process involving the filtration of a gas through said filtering system, wherein the industrial process is an industrial process for which said filtration is a sterilizing filtration, said filtering system (F1;
- F2) comprising at least one filtering cartridge, the method comprising at least the following steps;
a measuring step (S1) during which a pressure difference Δ
P, representative of the pressure loss generated by the filtering system (F1;
F2), is measured,a testing step (S2, S3) during which said measurement (S1) is compared to a predetermined upper threshold (Sh) and a predetermined lower threshold (Sb), in such a way as to consider said at least one filtering cartridge to be non-compliant when the pressure difference measured in the measuring step (S1) falls outside a range located between said upper threshold (Sh) and said lower threshold (Sb) said method comprising a preliminary step (S01) for measuring the pressure difference Δ
P0 representative of the pressure loss generated by the filtering system when said at least one filtering cartridge is new, and a calibration step during which a calculation is notably used to determine said upper threshold (Sh) and the lower threshold (Sb) depending on said pressure difference Δ
P0 measured,wherein the measurement of the pressure difference made during the measuring step (S1) is performed by means of a pressure difference measuring device having sensitivity of 5% or less of the value Δ
P0 representative of the pressure loss generated by the filtering system when said at least one filtering cartridge is new,Wherein Δ
P0 being the pressure loss generated by the filtering system when said at least one cartridge is new, and wherein the value of the lower threshold (Sb) is between 0.7*Δ
P0 and 0.95*Δ
P0 and wherein the value of the upper threshold (Sh) is between 1.3*Δ
P0 and 3*Δ
P0, and wherein the state of integrity of said at least cartridge in the sense that the filtered gas are considered sterile is implemented by monitoring only pressure difference Δ
P, representative of the pressure loss generated by the filtering system (F1;
F2).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- F2) comprising at least one filtering cartridge, the method comprising at least the following steps;
Specification