ISO 19438:2023
Diesel fuel and petrol filters for internal combustion engines — Filtration efficiency using particle counting and contaminant retention capacity
This document specifies a multi-pass filtration test, with continuous contaminant injection and using the on line particle counting method, to evaluate the performance of diesel fuel and petrol filters for internal combustion engines submitted to a constant flow rate of test liquid. The test procedure determines the contaminant capacity of a filter, its particulate removal characteristics and differential pressure. This document is applicable to filter elements having a rated flow between 50 l/h and 800 l/h; however, by agreement between the filter manufacturer and customer, and with some modifications, the procedure is permitted for application to fuel filters with higher flow rates.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test apparatus and materials
5.1 Test apparatus
5.1.1 Test rig
5.1.2 On line dilution and particle counting system
5.2 Test materials
5.2.1 Test contaminant
5.2.2 Test fluid
6 Accuracy of measuring instruments and test conditions
7 Test rig validation
7.1 General
7.2 Validation of the on line dilution and particle counting system
7.3 Validation of filter test circuit
7.4 Validation of contaminant injection circuit
8 Preliminary preparation
8.1 Test filter assembly
8.2 Contaminant injection circuit
8.3 Filter test circuit
9 Test procedure
9.1 Initial procedure
9.2 Filter test
10 Calculation and reporting of test results
10.1 Test report
10.2 Calculation
10.2.1 General
10.2.2 Gravimetric levels
10.2.3 Filtration efficiencies
10.2.4 Filter ratings
10.2.5 Injected mass of contaminant
10.2.6 Non-retained mass of contaminant
10.2.7 Retained filter capacity
Annex A (normative) Specification of test fluid for filter test
Annex B (informative) Typical filter test report, presentation of test results
Annex C (normative) Example filter efficiency calculations
Annex D (informative) Effect of dust cake filtration on filter capacity
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test apparatus and materials
5.1 Test apparatus
5.1.1 Test rig
5.1.2 On line dilution and particle counting system
5.2 Test materials
5.2.1 Test contaminant
5.2.2 Test fluid
6 Accuracy of measuring instruments and test conditions
7 Test rig validation
7.1 General
7.2 Validation of the on line dilution and particle counting system
7.3 Validation of filter test circuit
7.4 Validation of contaminant injection circuit
8 Preliminary preparation
8.1 Test filter assembly
8.2 Contaminant injection circuit
8.3 Filter test circuit
9 Test procedure
9.1 Initial procedure
9.2 Filter test
10 Calculation and reporting of test results
10.1 Test report
10.2 Calculation
10.2.1 General
10.2.2 Gravimetric levels
10.2.3 Filtration efficiencies
10.2.4 Filter ratings
10.2.5 Injected mass of contaminant
10.2.6 Non-retained mass of contaminant
10.2.7 Retained filter capacity
Annex A (normative) Specification of test fluid for filter test
Annex B (informative) Typical filter test report, presentation of test results
Annex C (normative) Example filter efficiency calculations
Annex D (informative) Effect of dust cake filtration on filter capacity
Bibliography