3M 4251+ Maintenance Free Reusable FFA1P2 Half Mask Respirator

DATA SHEET

Compatible Filters

No replacement filters are required or available for this mask. The filters are permanently bonded to the mask body and cannot be replaced – which is why it is certified to EN 405 rather than EN 140. Once the filters are spent, the complete mask is discarded.

If you need a 3M mask with replaceable filters, see the 3M 6000 Series Reusable Half Mask.

Product Overview

The 3M™ 4000+ Series Reusable Half Face Masks are ready-to-use, maintenance-free half masks designed for effective and comfortable protection against many gases, vapours and combination particulate hazards. The 4251+ protects against organic vapours with a boiling point above 65°C and particulates.

Key Features

• Disposable, maintenance-free half mask – no assembly, maintenance or record keeping required
• Twin inhalation valves for reduced breathing resistance
• Large bonded carbon filters with permanently attached particulate filters
• Ready to use straight from the box
• Optional overspray guard (400+) available
• Face fit testing is required before use, as with all tight-fitting respirators

Technical Specifications

• Protection class: FFA1P2 R D
• Filters: Permanently attached – not replaceable
• Nominal Protection Factor (gas and vapour): 12
• UK/Ireland Assigned Protection Factor: 10
• Germany APF: 30
• Italy APF: 30 or 1000 ppm (whichever is lower)
• Protects against: organic vapours (b.pt. >65°C) with good warning properties, plus particulates

Safety Standards & Compliance

• EN 405:2001 +A1:2009 – valved filtering half masks for gases, vapours and particulate combinations

Typical Applications

• Spray painting where both vapour and overspray are present
• Chemical handling with airborne particulates
• Foundry, welding fume and solvent environments
• Multi-hazard work requiring combined gas and particulate protection

Why Buy From Expert Safety Supplies?

Expert Safety Supplies provides high-quality personal protective equipment designed for professional, industrial and commercial use. We offer fast UK delivery, competitive pricing and expert product support.

Expert Safety Supplies  |  sales@expertsafety.co.uk  |  01706 650 200