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Del-Monox Meets OSHA and CSA Breathing Air Standards

Del-Monox Breathing Air Systems by Deltech

Del-Monox purifiers are designed to reduce the concentration of selected contaminants in conventional compressed air used for breathing. When used as directed, Del-Monox purifiers supply air that meets OSHA Grade D and CSA maximum allowable contaminants for compressed breathing air.

The two most important breathing air standards are the Occupational Safety and Health Administration (OSHA) and the Canadian Standards Association (CSA).

In its published requirements [29CFR1910.134(d)(1)], OSHA states that compressed "breathing air shall meet at least the requirements of the specification for Grade D air as described in the ANSI Compressed Gas Association Commodity Specification for Air, G-7.1-1989.”

In 1989, the Compressed Gas Association revised G-7.1. In the 1989 version, the allowable carbon monoxide level for Grade D air was reduced from 20 to 10 ppm. See the table below for the maximum allowable levels. You should check with your local OSHA office to verify its interpretation on this point. The CSA standard, Compressed Breathing Air Systems CAN3-Z180.1-00, also contains specification for the quality of compressed breathing air.

Contaminant and maximum allowable limit required by OSHA in the U.S. and CSA in Canada.

Contaminant	OSHA	CSA
Oxygen	19.5-23.5%	20-22%
Carbon Monoxide (ppm v/v)	10	<5m L/m³
Carbon Dioxide (ppm v/v)	1,000	500m L/m³
Oil (Condensed Hydrocarbons) mg/m³	5	1mg/m³
Odor	"lack of noticeable odor"	"free of any detectable odor"

Del-Monox purifiers are designed to reduce the concentration of selected contaminants in conventional compressed air used for breathing. When used as directed, Del-Monox purifiers supply air that meets OSHA Grade D and Canadian Standards Association (CSA) maximum allowable contaminant levels for compressed breathing air.

Gross contamination of the inlet air to the compressor will affect the efficiency of the purifiers.

Air entering the purifier must not be oxygen deficient.
The compressor intake must be located in a clean air environment so that the inlet air to the compressor contains the oxygen concentration normally present in atmospheric air.
The purifier will efficiently convert concentrations of carbon monoxide up to 600 ppm at the purifier inlet. However, in order to meet OSHA standards, carbon monoxide concentration at the inlet must not exceed 200 ppm, and to meet CSA standards, it must not exceed 100 ppm.

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