This document describes the features and characteristics of the 3M™ reusable respirators, including maintenance-free design, low breathing resistance, and comfortable facepiece material.
The 3M 4000 Series respirators are designed for maximum safety and simplicity with a maintenance‑free concept. They feature a low‑profile design for better peripheral vision, a low‑resistance parabolic valve to reduce heat build‑up, and soft, non‑allergenic face‑piece material. The respirators use two large bonded carbon filters that provide low breathing resistance and are CE marked (EN405:2001).
The catalogue lists several model variants (4251, 4255, 4277, 4279) with specific gas/vapour and particulate protection levels. Accessories such as an over‑spray guard, a soft carry case, and a face‑seal cleaner are offered to extend service life and improve comfort. Replacement is recommended after 28 days or when breathing resistance increases or breakthrough occurs.
| Filter type | 2 large bonded carbon filters |
|---|---|
| Replacement interval | Replace after 28 days or when breathing resistance increases or breakthrough occurs |
| Valve type | Low resistance parabolic valve |
| Face piece material | Soft/Non‑allergenic |
| Design profile | Low profile for better peripheral vision |
| Certification | EN405:2001/CE marked |
It should be replaced after 28 days or when breathing resistance increases or breakthrough occurs, whichever comes first.
They use two large bonded carbon filters that provide low breathing resistance.