Articles
About determination of the dust mask protective efficiency by the test aerosol „Paraffin Oil“
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- Category: Environmental safety, labour protection
- Last Updated on 14 July 2013
- Published on 14 November 2012
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Authors:
S.I. Cheberiachko, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Institution “National Mining University”, Senior Lecturer of the Department of Aerology and Labour Protection, Dnepropetrovsk, Ukraine
M.M. Naumov, State Higher Educational Institution “National Mining University”, postgraduate student of the Department of Aerology and Labour Protection, Dnepropetrovsk, Ukraine
D.I. Radchuk, State Higher Educational Institution “National Mining University”, Assistant Lecturer of the Department of Aerology and Labour Protection, Dnepropetrovsk, Ukraine
Abstract:
Purpose. To study of the influence of the main features of the new test aerosol introduced according to the harmonized European standards on the penetration coefficient of respirators and filtering materials. Now the paraffin oil should be used and its influence on penetration coefficient of the equipment has not been researched yet.
Methodology. Methods described in DSTU EN 149:2003 “Respiratory Protective Devices. Filtering Half Mask for Protection from Particulate Pollutants. Requirements, Testing, Marking” have been applied for testing of the penetration coefficient and leakage coefficient by means of the testing model and then by testers.
Findings. It was established that decreasing of the heating temperature and pressure in the atomizer leads to decreasing of the test aerosol particle diameter therefore the nature of the penetration process changes as well. Test results have shown that the saturation of the filtering material by the test aerosol lasts during the first 3 minutes thereafter penetration coefficient becomes stable. The penetration coefficient grows with the air flow increase because the electrostatic mechanism of the aerosol particles capture decreases. The penetration coefficient of the test-aerosol does not depend on its concentration in the testing box.
Originality. The protective efficiency dependence on testing time, temperature and pressure has been determined. This allows simulating different test aerosols during testing of new types of protective half mask.
Practical value. The procedure of respirator protective efficiency determination has been established.
References:
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3. ДСТУ EN 149:2003. „Засоби індивідуального захисту органів дихання. Півмаски фільтрувальні для захисту від аерозолів. Вимоги, випробування, маркування“. Введ. 01.10.2004. – К.: Держспоживстандарт, 2003. – 26 с.
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