Analysis of pressure difference changes in respirator filters while dusting

Cheberiachko, Serhii; Yavorska, Olena; Cheberiachko, Yurii; Yavorskyi, Andrii

doi:10.1051/e3sconf/20186000012

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…Aspirator 6 was used to take air with the rate of 95 l/min from the under-mask area of a dummy; further, the air was sent to spectrophotometer Selmi С-115Е (7) to determine its concentration and penetration coefficient of a half-mask. As a result of device 8 operation, special software was used to calculated coefficient of protection and suction as a ratio of test-aerosol concentrations before and after CIPD application [14,16].…”

Section: Methods Of the Researchmentioning

confidence: 99%

Studying the efficiency of a complex individual protective device

Cheberiachko

Yavorska

Hridiaiev³

et al. 2019

E3S Web Conf.

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Objective is to study efficiency of a complex protective device including coefficients of penetration and suction of aerosols for dust half-masks of various designs. The half-masks were tested experimentally on specially designed laboratory stands with the help of volunteer-testees; the tests included specifications according to EN 149, EN 352-1, ISO 6942. The studies have demonstrated that a complex protective device for workers is rather efficient providing average coefficient of suction being 1.5% that is almost by 30% less than the values of standard filtering respirators of similar protection class. Noise attenuation within the range of 4000 – 8000 Hz is from 19 to 26.7 dB; within the range of speech frequency (0.5÷2.0 kHz), acoustic efficiency is up to 8÷16 dB helping preserve the possibility of communication and timely reaction to warning signals. Use of thermal protecting elements makes it possible to reduce temperature of head heating by 80% comparing to the results obtained without the protective device application. The developed balaclava with the built-in dust respirator and hearing protection devices may be used in the context of the corresponding filter class up to 12 MAC in terms of the most hazardous aerosols, when noise level is up to 14 dB within 2000 – 8000 Hz frequency range; moreover, it provides slow temperature rise up to 2 ºС per minute.

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Section: Methods Of the Researchmentioning

confidence: 99%

Studying the efficiency of a complex individual protective device

Cheberiachko

Yavorska

Hridiaiev³

et al. 2019

E3S Web Conf.

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“…Due to the required movements, talks, and unmasking, some gaps arise behind obturation line deteriorating protection of employees against harmful matters getting into their respiratory organs [1]. Within the last, year respiratory protection became a very important and necessary condition of health care of users, thus tightness test of fi ltering half-masks of respirators moves to the forefront [2,3].…”

Section: Originality According To the Requirements Of Technicalmentioning

confidence: 99%

“…In the process of the calculations, the averaged values of half-mask adhesion, concerning each tester, were registered in the proper cell (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) of the two-parametric table. Fig.…”

Section: Originality According To the Requirements Of Technicalmentioning

confidence: 99%

Determination of tightness of the filtering half-mask adhesion to a user’s face

ГОЛІНЬКО¹,

Pavlychenko²,

Cheberiachko³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To determine the correlation between adhesion tightness of filtering half-masks and anthropometric indices of employees faces. Methodology. To study tightness of the half-mask adhesion to a users face, a coefficient of NaCl aerosol test was determined in accordance with the requirements by DSTU EN 149:2017 (EN 149:2001+A1:2009, IDT). Volunteers took part in the testing selected in keeping with the parametric table divided into 12 settings along the face length and across its width. The tests were carried out using Respi and Standart respirators produced in lots by SPE Standart ltd. Findings. It has been identified that the tested filtering half-masks correspond to the standards by DSTU EN 149:2017 (EN 149:2001+A1:2009, IDT) and provide adequate protection of respiratory organs of users against harmful aerosols. It has been demonstrated that the required half-mask adhesion to a face depends upon the obturator design, half-mask geometry, and stretching force of a headband. It has been proved that employees with small faces require the instrumental verification of the preferred half-mask while selecting respiratory protective equipment. In turn, for users with large faces quality control is quite sufficient by means of any suitable method described by DSTU EN 529:2006 (EN 529:2005, IDT). Individuals with large faces have demonstrated the greatest values of the tightness coefficient of filtering half-mask adhesion. Originality. It is represented by the scientific substantiation of the tightness coefficient of filtering half-mask adhesion upon the length and width of users faces. Practical value. Mathematical expressions have been derived making it possible to calculate the tightness coefficient of the half-mask adhesion relying upon the face size. The abovementioned will help assess preliminarily protective characteristics of respirators without specific laboratory equipment.

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“…As we can see, the consequences of coal dust getting into the workers' lungs are rather drastic anyway. That is confi rmed by the number of studies as for the occurrence of lung diseases caused by entrance of hazardous aerosols [1][2][3][4][5]. For instance, paper [2] indicates that within the period of 1970-2004, 69,277 miners died in the USA while in China up to 5,000 cases of respiratory diseases had been re-corded annually up to 2010.…”

Section: Introductionmentioning

confidence: 96%

A risk of pulmonary diseases in miners while using dust respirators

Cheberiachko¹,

Yavorska²,

Yavorskyi³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To determine magnitudes of the occupational risks of respiratory disease (pneumoconiosis) occurrence in miners while using filter respirators on the basis of an exposure dust dose with the consideration of work experience. Methodology. To assess occupational risks, a new approach proposed by the Research Institute of Complex Hygiene and Occupational Diseases is used. The approach is based on determining an exposure dose of a hazardous substance entering the workers lungs during their professional contact with it taking into account the volume of pulmonary ventilation, the number of shifts, and work experience. Findings. Use of dust respirators reduces the risk of occupational respiratory diseases but does not eliminate it completely. It has been established that with more than three-year work experience and coal dust concentrations of more than 50 mg/m3, use of dust filter respirators does not ensure a minimal degree of the occupational disease risks. At the same time, it has been identified that if work experience is less than 3 years with the use of filter respirators, the risk of occupational diseases will be minimal. It has been proved that the risk assessment should involve using the minimal value of a protection factor of a respirator, which is fixed in the production environment. It has been shown that working within the areas with dust concentrations higher than 100 mg/m3 is dangerous for miners; over time, with the accumulation of sufficient dust in the lungs it will lead to the development of silicosis. Originality. It consists in scientific substantiation of the magnitude of occupational risk of respiratory diseases in miners, taking into account a real protection factor of respirators, which is determined at the workplace based on the calculation of an exposure dose and time of professional contact with hazardous substances. Practical value. The experience of safe operation in mine workings with and without using filter respirators has been substantiated, basing on a safe value of coal dust concentration, at which a low level of occupational risk of respiratory diseases is recorded. Recommendations for determining the dust load taking into account a protection factor of respirators at the workplace have been developed.

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Analysis of pressure difference changes in respirator filters while dusting

Cited by 5 publications

References 10 publications

Studying the efficiency of a complex individual protective device

Studying the efficiency of a complex individual protective device

Determination of tightness of the filtering half-mask adhesion to a user’s face

A risk of pulmonary diseases in miners while using dust respirators

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