3M™ Maintenance Free Half Mask Respirator 4251
Part of the 4000 series the 3M 4251 reusable half face respirator mask helps to provide protection against particles and vapours when used with an integrated cartridge and filters. 3M are one of the best to ensure you uphold your safety and health.
The 4251 respirator mask features integrated filters, which then enables the field of view to be undisturbed when being used. An adjustable head cradle helps fit a large variety of head sizes, with neck straps for a more secure fitting. An exhalation valve that helps to direct exhaled breath and moisture downwards to avoid fogging up glasses or face shields.
An Integrated cartridge and filters offer convenience, protecting against many gases, vapours and combination particle hazards. With two large inhalation valves that allow for reduced breathing resistance, and the simply use until your change out schedule indicates a replacement. The half face mask is made with a strong body construction and stable silicone face seal, which when secured it provides a leak free seal. The 4251 (FFA1P2 R D) has a protection against organic vapours and hazardous particles. Vapours up to 10 x Threshold Limit Value (TLV) or 1000 ppm, whichever is lower and 12 x TLV for particulates.
Features & Benefits
Ready-to-use half mask designed for effective and comfortable protection against organic vapour and particulate hazards Respirators can be used until damaged, particulate filters clog, gas filters become saturated or after one month
Exhalation valve centrally positioned for effective removal of heat and moisture
Low profile design for better peripheral vision
Adjustable head cradle and easy to fasten neck straps
Soft, non-allergenic material with textured face seal
Lightweight, well balanced design
How long do particle filters last?
As particle filters load up with the contaminant they actually become a better filter. However, they become a harder filter to breathe through. The user will notice breathing becoming too hard and will then need to change the filter.