Different Types of Head Masks
Breathing Apparatus Holder
1.3.1.3 Self Contained Breathing Apparatus (SCBA) Self Contained Breathing Apparatus (SCBA) respirators are units that allow the wearer to carry his / her own supply of breathable air which is independent of the surrounding atmosphere; providing protection against oxygen deficiency and toxic atmospheres. The chief limitations of these units are: They do not afford protection against contaminants that can be absorbed through or are extremely irritating to the skin; such as ammonia, hydrochloric acid, hydrogen cyanide, etc., or unknown toxic waste. They are heavy and bulky and cumbersome to use in confined spaces. They have a short service life; as little as 15 minutes under some circumstances. Specifications: Self contained breathing apparatus respirators vary in scope and design of operation. The following outlines the specifications that are required or desirable in those units that we have in service:
Panorama Nova Respirator
Panorama Nova RA
Whistle
Panorama Nova P
Kareta Nova
Resistance warning device
Positive Pressure Demand Valve. The demand valve reduces the pressure of the air from that of the tank at 155 kg / cm2 (2216 psig) to that of a breathable pressure. A positive pressure demand valve ensures that the pressure in the face mask is always above the external atmospheric pressure and therefore any leakage due to a poorly fitting face mask will be outward. The use of "Negative Pressure Demand Valves" (whereby air is drawn into the facepiece by the negative pressure created when the wearer inhales) is PROHIBITED.
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