three months

## How much air is in a SCBA bottle?

The cylinders contain about 1240 litres of compressed air at 200 atmosphere pressure. This gives the wearer around 31 minutes of air supply for full usage or about 21 minutes for working conditions (person breathes heavily during work hence there is more consumption of air and that is why the time is lesser)

## What are the safety precautions taken when using an SCBA?

Before donning a SCBA, make certain that all the connections are secure and the cylinder is fully charged. Always pick up a SCBA by its carrying harness or frame. If you pick it up by the facepiece or regulator assembly, you may damage the lens, the breathing hoses or the regulator components.

## What are some limitations of SCBA devices?

Limitations: SCBA units are expensive to purchase and maintain; require the wearer to carry 20 to 30 pounds of equipment on their backs, and provide no more than 40 minutes of continuous use. Personnel with facial hair which comes between the respirator sealing surface and the wearer’s face cannot use SCBA equipment.

## What are the limitations of using SCBA devices?

General Limitations – All SCBA

• Use only for temperatures above the temperature listed on the approval label.
• Approved only when compressed air reservoir is fully charged with air meeting the requirements of the Compressed Gas Association specification G-7.1 for Type 1, Grade D air, or equivalent specifications.

## What is the difference between SCBA and Eebd?

An EEBD is a supplied air or oxygen device only used for escape from a compartment that has a hazardous atmosphere and Shall not be used for fighting fires, entering oxygen deficient voids or tanks, or worn by firefighters. In these events, a self contained breathing apparatus (SCBA) shall be used.

10 to 20 minutes

15 minutes

## How is SCBA calculated?

Calculation

1. 1 – Multiply the water capacity by the pressure to establish Total Volume (TV): e.g. 6.8ltr Cylinder X 300 Bar = 2,040 ltr (TV)
2. 2 – Divide TV (total volume) by breathing rate to establish ‘Total Duration’ (TD)
3. 3 – Calculation of Safety Factor & Working Duration (WD)

## How long a 200 bar pressurized SCBA set can work?

A 6 litre 200 bar steel cylinder offering a cost effective way to contain air for use with a Drager breathing apparatus. CE marked in accordance with the Pressure Equipment Directive (PED). This cylinder provides 30 minutes of on-demand breathing air.