General information
- Half masks cover the nose, mouth and chin.
- They are supplied in different shapes and sizes.
- This type relies on the wearer's breathing to pull the air through the filter.
- These masks have inlet and outlet valves, which must be in good condition.
- Reusable half masks are usually made from a flexible rubber or silicone material.
- Half-mask respirators are uncomfortable to wear continuously for more than 1 hour.
- The respirators can be cleaned and used many times, as recommended by the manufacturer.
- A reusable half-mask can be fitted with particle filters, gas filters, vapour filters or a combination of gas, vapour and particle filters.
- They are all right for light work (work activity when seated) and medium work rate (work activity involving sustained hand and arm movements, or similar to brisk walking).
Do
- Fit the straps as recommended.
- Train users to use the RPE correctly.
- Select the right size mask for each wearer.
- Always fit two identical filters to a twin-filter mask.
- Change used filters at the manufacturer's recommended frequency.
- Fit-testing for each wearer is required when using this RPE for the first time.
- Ensure you have the right filter(s) for the substance – particle, gas or vapour, or the required combination.
- Ensure that wearers check the RPE fits correctly every time, as recommended by the manufacturer.
Don't
- Store in dirty areas between uses.
- Make DIY modifications to the RPE.
- Damage or deform the mask when putting it away.
- Use a damaged respirator – mask, filters, straps or valves.
- Use in oxygen-deficient atmospheres, for example confined spaces.
- Use a P1 filter against fume unless recommended by the manufacturer.
- Get dirt inside the mask, or use solvents to clean the mask, straps or filters.