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EN 135-2

Respiratory protection in the style of a full-face mask.

What is EN 135-2 standard?

This standard specifies the minimum requirements for full face mask respiratory protective devices.


EN 135-2 explained

Full-face masks for diving apparatuses are not included in the scope of this standard. Laboratory and practical performance tests are included in these requirements' compliance assessments. A mask is a full-face piece that covers the eyes, nose, mouth, and chin and that provides the wearer with respiratory protection in the form of an appropriate seal against specific atmospheric conditions and airborne hazards. Respirators and masks are manufactured in natural rubber, EPDM, and silicone and are available in designs and with filters that conform to a variety of safety standards (e.g., EN 141, EN 143, and EN 371).

This standard covers three types of full-face masks, all provide the same level of respiratory protection but have differences in terms of their applications:

• CL 1: Full mask for light duty
• CL 2: Full mask general use
• CL 3: Full mask for special use

Requirements include temperature stability, impermeability, the concentration of carbon monoxide, breathing resistance, speech diaphragms, and field of vision.


• Materials
• Resistance to temperature
• Inflammability
• Resistance to thermal radiation
• Finished pieces
• Replaceable components
• Headband
• Connectors
• Speech diaphragm
• Eye and viewers
• Inhalation valves and exhalation valves
• Airtightness
• Skin compatibility
• Carbon dioxide content in the air inhaled
• Breathing resistance
• Inward leakage
• Field of View

Marking package:

• Manufacturer
• Type and Class
• Standard
• CE marking
• Reference to user instructions
• Size notation (if more sizes are available)
• Country of origin

Marking on face mask:

• Manufacturer
• Type and Class
• Standard
• CE marking
• Size notation (if more sizes are available)
• Country of origin
• Production year (clock notation)
• The marking signs need to be clear and durable