Portwest - Size Chart and Colour Guide

EN STANDARDS: RESPIRATORY PROTECTIVE DEVICES

PS11

P441

Class 1: Low capacity, up to 1000ppm Class 2: Medium capacity, up to 5000ppm Class 3: High capacity, up to 10,000ppm

EN136:1998 Full Face Mask Facepieces

Class 1: Light Duty Class 2: General Use Class 3: Special Use (Heavy Duty/Firefighters)

EN143:2007: Particulate Filters​

PARTICULATE FILTER CLASSES: P1 - Low filter performance (80% efficiency) P2 - Medium filter performance (94% efficiency) P3 - High filter performance (99.95% efficiency) ​ EN148-1: Standard Threads for Facepieces ​ EN405:2001+A1:2009 Valved Filtering Half Mask with Fixed Gas Filters and/or Particulates Filters

EN140:1998 Half Mask Facepieces

EN14387:2008 Gas Filters and Combination Filters MAIN GAS FILTER TYPES: A - Organic gases and vapours with a boiling point >65°C​ B - Inorganic gases and vapours E - Sulphur dioxide and other acid gases and vapours K - Ammonia and organic ammonia derivatives

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GAS FILTER CLASSES

Gas and Vapours Filters

Type Colour Code A B E K

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