Assuming that a kidney loop or off-line filtration system is continuously processing a fuel tank, an ISO Cleanliness Code of 13/10/7 would clearly meet the specification. The exact ISO Cleanliness Code is open for discussion and debate. In this instance, the OEM does not want their equipment to exposed to any particles larger than 10 micron. I was recently asked how we might use ISO 4406 to report fuel cleanliness. Industrial filtration equipment manufacturers do not report cleanliness using ISO 4406 but ASTM D6217. The Parker iCount is useful in measuring contamination in distillate fuels. #ISO 4406 PARTICLE COUNT CHART HOW TO#Please see Machinery Lubrication for more details on how to use this information. Each gure denes a class within a size range. The ISO 4406 oil cleanliness classication system consists of 3 gures. Note that this does not provide wear metals analysis but only particle counts. International particle count standards ISO 4406 Particle contamination in oil is specied from particle count. Note that these instruments are not intended to replace ongoing oil sampling and analysis programs, but to enhance them and to alert the client when conditions might change. Very often we will add the Parker iCount to our equipment packages as an economical means to report particle counts in real time. Using the table below, the ISO code number to the left is used to represent the number of particles per ml. We will use this information to best recommend the filtration media we think will best result in achieving the specified ISO Cleanliness Codes. ISO 4406 measures the number of particles larger than 4µm, 6µm, and 14µm within the 100ml fluid sample. The data from Figure 5 shows the particle counts vs. Figure 4 shows a standard ISO 4406 report for a single sample tube measured three times. Examples of generated reports are shown in Figures 4 and 5. As filter specialists, we use the ISO Cleanliness Code along with High Purity filters to monitor the effectiveness of filtration we prescribe to solve a specific problem.Įquipment or component manufacturers will often specify the ISO Cleanliness Code to best protect their equipment. Automated reports providing particle concentration and ISO 4406 scale numbers are printed or sent to a LIMS system. These values are typically used to monitor the cleanliness of the oil. The example below (Table 1) shows the a typical ISO Cleanliness Code of 17/13/11 and how each number represents the quantity of particles of each size (and larger) per one milliliter. The table below shows the ISO Code and the quantity of particles of each size and larger as measured per milliliter(ml). The ISO Cleanliness Code correlates to the quantity of particles that are 4µm and larger, 6µm and larger, and 14µm and larger. #ISO 4406 PARTICLE COUNT CHART FULL#The full report shows the quantity of particles that are of the value and larger for each of the following particle size (in microns): 4µm, 6µm, 10µm, 14µm, 21µm, 38µm and 70µm. The laser counts the quantity and size of the particles it sees. Laser particle counting is the most common method used. The industry standard for reporting fluid cleanliness is ISO 4406:99, also known as ISO Cleanliness Code.
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