BS ISO 5011:2014 pdf free.Inlet air cleaning equipment for internal combustion engines and compressors – Performance testing.
BS ISO 5011 establishes and specifies uniform test procedures, conditions, equipment, and a performance report to permit the direct laboratory performance comparison of air cleaners.
The basic performance characteristics of greatest interest are air flow restriction or differential pressure, dust collection efficiency, dust capacity, and oil carry-over on oil bath air cleaners. This test code therefore deals with the measurement of these parameters.
This International Standard is applicable to air cleaners used on internal combustion engines and compressors generally used in automotive and industrial applications.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5 167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross- section conduits running full — Part 1: General principles and requirements
ISO 12103-1. Road vehicles — Test contaminants forfilterevaluation — Part 1: Arizona test dust
3 Terms and definitions
3.1 Terms, definitions, symbols and units
For the purposes of this International Standard, the following terms and definitions apply.
3.11 air filter air cleaner device which removes particles suspended in the fresh charge as it is drawn into the engine
3.1.2 filter element replaceable part of the air filter, consisting of the filter material and carrying frame
4 Measurement accuracy and standard conditions
4.1 Measurement accuracy
Measure the air tlow rate to within ± 2 ‘, ot the actual value, except tor the variable air now test wnen
accuracy may be ± 2 % of the maximum value of the cyclic flow rate through the cleaner.
Measure the differential pressure and restriction to within 25 Pa of the actual value.
Measure the temperature to within 0,5 °C of the actual value.
Measure the mass to within I % of the actual value except where noted.
Measure the relative humidity (RH) with an accuracy of ± 2 % RH.
Measure the barometric pressure to within 3 hPa.
The measurement equipment shall be calibrated at regular intervals to ensure the required accuracy.
4.2 Standard conditions
All airflow measurements shall be corrected to a standard condition of 20 °C at 1 013 hPa (1 013 mbar).
See Annex G.
5 Test materials and test conditions
5.1 Test dust
5.1.1 Grade
The test dust to be used shall be ISO 12103 – A2 (ISO Fine) or ISO 12103 – A4 (ISO Coarse), subject to agreement between the filter manufacturer and client. The chemical analysis and the particle size distribution shall conform to ISO 12103-1.
In the absence of an agreement on the dust
— for single-stage filters, use ISO Fine test dust, and
— for multistage filters, use ISO Coarse test dust.BS ISO 5011 pdf download.