ISO 19438:2023 PDF

Diesel fuel and petrol filters for internal combustion engines — Filtration efficiency using particle counting and contaminant retention capacity

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Title (English):

ISO 19438:2023

Diesel fuel and petrol filters for internal combustion engines — Filtration efficiency using particle counting and contaminant retention capacity

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 28
Publication date:: February 8, 2023
Edition:: ISO IS 19438 edition 2 version 1
ICS:: 43.060.40

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Description (English):

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.

Technical details

Technical committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
SKU: ISO 19438:2023

Abstract

Overview

ISO 19438:2023 specifies a standardized multi-pass filtration test for diesel fuel and petrol filters used on internal combustion engines. The procedure uses continuous contaminant injection and an on-line particle counting method at a constant test liquid flow rate to determine a filter’s filtration efficiency, contaminant retention capacity, and differential pressure. The standard applies to filter elements with rated flows between 50 l/h and 800 l/h (with possible agreement-based modification for higher flows).

Key topics and technical requirements

Test method: Multi-pass recirculation with continuous contaminant injection and online particle counting to monitor upstream/downstream particle counts.
Measured parameters:
- Filtration efficiency (initial, overall and particle-size-based efficiencies).
- Retained contaminant mass (filter capacity).
- Differential pressure vs. flow characteristics.
- Gravimetric contamination levels and system conductivity (initial and final).
Test rig components: Separate filter test circuit and contaminant injection circuit, reservoir designs, pumps that do not alter particle size distribution, clean-up filters, turbulent mixing piping, sampling valves for online counting and gravimetric sampling.
Instrumentation and validation: Accuracy and calibration requirements for particle counters (referencing ISO 11171), validation of dilution/counting systems, contaminant injection, and overall test rig.
Test materials: Specified test contaminants and test fluid (Annex A), plus guidance on injection flow (recommended 0.25 l/min, with constraints to avoid affecting capacity).
Reporting and calculations: Detailed methods for calculating efficiencies, filter ratings (µm(c) based on ISO 11171 calibration), injected/non-retained mass, and retained capacity. Annexes include test report templates and example calculations.

Practical applications - who uses ISO 19438:2023

Fuel filter manufacturers - product development, quality control, and validating filter design performance.
Automotive OEMs and suppliers - component specification, supplier acceptance testing, and comparative evaluation of diesel/petrol filters.
Independent test laboratories - accreditation and consistency in filter performance testing using particle counting and gravimetric methods.
R&D teams - benchmarking filtration efficiency, studying dust-cake effects (Annex D), and optimizing media and constructions.
Aftermarket and maintenance organizations - performance verification and selection of replacement filters.

Related standards

ISO 19438 references and aligns with other standards used in test setup and measurement, including:

ISO 11171 (automatic particle counter calibration)
ISO 4405 (gravimetric contamination analysis)
ISO 4021, ISO 3968, ISO 12103-1, ISO 11841 series

ISO 19438:2023 is a steady-state, laboratory classification test - useful for comparative and design evaluations, but not a direct simulation of transient field operating conditions.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Test method: Multi-pass recirculation with continuous contaminant injection and online particle counting to monitor upstream/downstream particle counts.
Measured parameters:
- Filtration efficiency (initial, overall and particle-size-based efficiencies).
- Retained contaminant mass (filter capacity).
- Differential pressure vs. flow characteristics.
- Gravimetric contamination levels and system conductivity (initial and final).
Test rig components: Separate filter test circuit and contaminant injection circuit, reservoir designs, pumps that do not alter particle size distribution, clean-up filters, turbulent mixing piping, sampling valves for online counting and gravimetric sampling.
Instrumentation and validation: Accuracy and calibration requirements for particle counters (referencing ISO 11171), validation of dilution/counting systems, contaminant injection, and overall test rig.
Test materials: Specified test contaminants and test fluid (Annex A), plus guidance on injection flow (recommended 0.25 l/min, with constraints to avoid affecting capacity).
Reporting and calculations: Detailed methods for calculating efficiencies, filter ratings (µm(c) based on ISO 11171 calibration), injected/non-retained mass, and retained capacity. Annexes include test report templates and example calculations.

Practical applications - who uses ISO 19438:2023

Fuel filter manufacturers - product development, quality control, and validating filter design performance.
Automotive OEMs and suppliers - component specification, supplier acceptance testing, and comparative evaluation of diesel/petrol filters.
Independent test laboratories - accreditation and consistency in filter performance testing using particle counting and gravimetric methods.
R&D teams - benchmarking filtration efficiency, studying dust-cake effects (Annex D), and optimizing media and constructions.
Aftermarket and maintenance organizations - performance verification and selection of replacement filters.

Related standards

ISO 19438 references and aligns with other standards used in test setup and measurement, including:

ISO 11171 (automatic particle counter calibration)
ISO 4405 (gravimetric contamination analysis)
ISO 4021, ISO 3968, ISO 12103-1, ISO 11841 series

ISO 19438:2023 is a steady-state, laboratory classification test - useful for comparative and design evaluations, but not a direct simulation of transient field operating conditions.

ISO 19438:2023 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses ISO 19438:2023

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses ISO 19438:2023

Related standards

Related standards

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