The S-3V Alpha S valved face mask has a unique inner face seal designed to maintain a close and snug fit around the chin area. Thia mask offers protection against fine / very fine toxic dusts, mists and fumes, metal fume and oil/water based particulates to the FFP3 NR* standard.
*NR stands for Non-Reusable. Suitable for use in a single shift of upto 8 hours
**APF is the Assigned Protection Factor allocated to each type of Respiratory Protective Equipment (RPE). Workplace Exposure Limits (WEP) are levels of contamination, set by the Health & Safety Executive, of the concentration of an airbourne substance, above which level precautions must be taken if exposure takes place. The APF number rating indicates how much protection the RPE is able to offer.
For more information on how to calculate the Assigned Protection Factor that you need and for general information about using Respiratory Protective Equipment at work, see the HSE website. You can also find information on substances with Work Exposure Limits.