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Newly Available Multipass Test Bench for Hydraulic and Lubricating Oil Filtration: ISO-Compliant with Cyclic Flow and Vibration Testing

IFTS, Research and Testing Center, located in France, has launched a new version of a multipass test bench to qualify fluid power, lubricating oil and fuel filters in terms of filtration efficiency and dirt holding capacity. This version is designed to be as close as possible to the working conditions of filters (cf. figure 1).

IFTS proposes to combine cyclic flow variation, mechanical vibration and on-line particle counting from 1.5 to 70 µm(c) (using 2 light scattering and 2 light obscuration APCs in total). The principle of the bench is to clog the filter under test with standardized silica test dust (Arizona test dust as specified as per ISO 12103-1) up to a given ∆P increase in steady or cyclic flow conditions under vibrational fatigue and to monitor on line the instantaneous particulate filtration efficiencies.

These combinations of working conditions will allow the users to discriminate filters from each other’s. The cyclic flow variation has usually a negative impact upon filtration efficiency (cf. figure 2) but the mechanical vibration could exhibit a significant filtration efficiency decay of the filter (cf. figure 3).

The vibration could generate particles release on preloaded filter which leads to negative filtration efficiency (See enclosed Table 1 based on Figure 3).

The outstanding working capacities of the bench that IFTS allows to meet conditions often found in fuel applications (5 L/min and 1 Bar of P) but also those exceptionally found in fluid power applications (200 L/min – and up to 60 Bar of P) (see table 2).

www.ifts-sls.com