Sundström gas filters range

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Sundström offers a range of gas filters that can be interchangeably used with the Sundström SR100 half-mask and SR200 full-face respirator by simply fitting into the filter attachment. The SR510 particle filter can be snapped onto the front of the gas filter.

It is important to change the filter before it becomes saturated, and the filtering function ceases and the user breathes unfiltered contaminated air. Several factors affect the use time of a gas filter, including the filter type, filter size, ambient humidity and temperature, work intensity and pollutant concentration.

A type A filter consists of pure activated carbon, while all other types consist of carbon with various types of impregnations. Filters have varying abilities to absorb chemicals outside these chemical groups.

Gas filters are divided into three classes based on their capacity and test concentration: Class 1: 0.1% by volume = 1000 parts per million (ppm); Class 2: 0.5% by volume = 5000 ppm; and Class 3: 1.0% by volume = 10,000 ppm.

Sundström gas filters fall into two main categories: class 1 and 2. A class 2 filter has a higher absorption capacity than a class 1 filter, but at the expense of higher weight and greater breathing resistance.

The higher the ambient humidity, the shorter the useful life of the filter is. Impregnated carbon filters (B, E, K filters) do not have such sensitivity. The temperature also affects the useful life of the filter.

Increased work intensity increases the pulse and breathing rates. A larger volume of air flows through the filter during a given period, and the useful life of the filter is directly proportional to the air flow.

All these factors must be considered when selecting a gas filter and/or a combination filter.

For more information: https://www.sea.com.au/product-range/sundstrom/filters-negative-pressure-respirators/.