3M 4251+ Half Mask

• Effective and comfortable protection against organic vapours and hazardous particles
• A newly improved valve design helps to reduce exhalation resistance for greater breathing comfort
• Lightweight, well-balanced, low-profile design
• Integrated cartridge and filters make it ready to use and maintenance-free
• Soft, close-fitting face seal made of textured, non-allergenic material
• Adjustable head cradle and easy-to-fasten neck straps
• Centrally positioned exhalation valve helps to reduce heat and moisture build-up in hot and humid conditions
• FFA1P2 R D protects against organic vapours with a boiling point above 65 °C, up to 10 x Workplace Exposure Limit (WEL*) or 1000 ppm (whichever is lower), and 10 x WEL* for particulates
• Includes a resealable bag for hygienic storage and transport

* WELs are limits on the quantity of substances that may be present in the air in the workplace.

This product helps to protect against certain gases and vapours in concentrations up to 10 x the Workplace Exposure Limit (WEL) or 1000 ppm (whichever is lower) and particulate concentrations up to 10 x WEL. Users must be trained and must have read all user instructions. Misuse may cause injury or serious, life-threatening illness. Contains no natural rubber latex components.

More information can be found at: 3M ™ Maintenance-Free Half Mask, FFA1P2 R D Filters, 4251+

Important additional information for all types of masks and filters

How do I know when the filters are exhausted?

1) If an odour still comes through the gas mask – from the product it is meant to protect against, or from a similar product with a strong odour. Tip: for most gas masks, a good test is whether you can smell thinner.

This does not, of course, apply to dust masks, which are generally not designed to filter out gases.

2) If breathing through the mask becomes noticeably harder, the filter is too clogged and must be replaced. This applies to both gas masks and dust masks.

3) If the filter or mask becomes visibly dirty, this is often accompanied by more difficult breathing. 

How do I extend the service life?

1) Where possible, avoid using gas masks in dusty environments or as a dust mask, as the gas filter will then clog more quickly.

2) Even when wearing a gas mask, continue to work with good extraction or ventilation.

3) After use, store the mask and/or filters in a zip-lock bag, resealable box or similar to prevent dust and reactions with gases.

Use of masks and filters

1) Write the date of first use on the bag or box in which the filters and mask are stored. This gives you an indication of how old the filter is and how often it has been used.

2) Only use masks that fit closely over the nose and mouth, so that no false sense of security can arise. Choose the right size and make sure the nose clips on the mask are pressed firmly into place.