US 7,320,760 B2 | ||
Cleaning efficiency testing method and apparatus for a filter in a filtering system | ||
Stefan Hedström, Helsingborg (Sweden); Harald Hermansson, Lund (Sweden); and Jeanette Lindau, Södra Sandby (Sweden) | ||
Assigned to Tetra Laval Holdings & Finance S.A., Pully (Switzerland) | ||
Appl. No. 10/496,672 PCT Filed Nov. 26, 2002, PCT No. PCT/SE02/02162 § 371(c)(1), (2), (4) Date May 26, 2004, PCT Pub. No. WO03/045530, PCT Pub. Date Jun. 05, 2003. |
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Claims priority of application No. 0104020 (SE), filed on Nov. 30, 2001. | ||
Prior Publication US 2005/0000894 A1, Jan. 06, 2005 | ||
Int. Cl. B01D 41/00 (2006.01) |
U.S. Cl. 210—741 [210/791; 210/108; 210/143; 73/38; 73/40] | 14 Claims |
1. A method for testing the efficiency of a cleaning procedure for a filter in a filtering system, said filter being provided
with pores, comprising the steps of:
performing said cleaning procedure for said filter,
wetting said filter,
pressurizing the filtering system,
measuring a pressure decay in said filtering system over a predetermined time period, and
determining, based on the pressure decay, whether or not the cleaning procedure has been effective, wherein a pressure decay
smaller than a predetermined threshold value indicates that the cleaning procedure has not been effective.
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