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  2. Respirator fit test - Wikipedia

    en.wikipedia.org/wiki/Respirator_fit_test

    U.S. law requires employers to offer employees a mask with large enough fit factor. For half face-piece masks (used when the concentration of harmful substances is not more than 10 PEL), the fit factor should not be less than 100; and for full face masks (not more than 50 PEL), the fit factor should not be less than 500. The safety factor of 10 ...

  3. FM12 NBC Respirator - Wikipedia

    en.wikipedia.org/wiki/FM12_NBC_Respirator

    The FM12 has an overall lower profile than the S10 and sits closer to the wearer's face. The FM12's drinking tube is also longer than that of the S10, making drinking easier while wearing the mask. The FM12 also has an inner mask to prevent fogging of the lenses. The 'ridge' present around the edge of the S10 is absent from the FM12.

  4. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    An open circuit SCBA typically has three main components: a high-pressure gas storage cylinder, (e.g., 2,216 to 5,500 psi (15,280 to 37,920 kPa), about 150 to 374 atmospheres), a pressure regulator, and a respiratory interface, which may be a mouthpiece, half mask or full-face mask, assembled and mounted on a framed carrying harness.

  5. Gas mask - Wikipedia

    en.wikipedia.org/wiki/Gas_mask

    A World War I British P Helmet, c. 1915 Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo) Indian muleteers and mule wearing gas masks, France, February 21, 1940 A Polish SzM-41M KF gas mask, used from the 1950s through to the 1980s

  6. PMK gas mask - Wikipedia

    en.wikipedia.org/wiki/PMK_gas_mask

    The PMK gas mask contains a drinking tube, allowing soldiers wearing the mask to rehydrate without removing the mask itself. The system consists of a special canteen cap, which will only allow water to flow through when connected to the tube leading to the mask. This system is compatible with standard type M drinking systems.

  7. Escape breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Escape_breathing_apparatus

    Polish Au-2 escape respirator. Escape breathing apparatus, also called escape respirators, escape sets, self-rescuer masks, emergency life saving apparatus (ELSA), emergency escape breathing devices (EEBD), and Respiratory Protective Smoke Escape Devices (RPED), [1] [2] are portable breathing apparatus that provide the wearer with respiratory protection for a limited period, intended for ...

  8. M40 field protective mask - Wikipedia

    en.wikipedia.org/wiki/M40_Field_Protective_Mask

    The M40 field protective mask is currently being replaced by the M50 joint service general purpose mask. [ 1 ] [ 2 ] On September 2, 2017, the Philippine Marine Corps received 1,000 M40 gas masks and C2 filters through the U.S. Embassy 's Mutual Logistics Support Agreement program.

  9. GP-4u - Wikipedia

    en.wikipedia.org/wiki/GP-4u

    The GP-4u gas mask in the Yekaterinburg school. The GP-4u (Russian: Гражда́нский Противога́з-4у, Grazhdanskii Protivogaz-4u) gas mask was one of the most widely produced gas masks in the USSR. The civilian GP-4u gas mask consists of the facepiece, the hose and a cylinder-shaped filter, which is screwed onto the end of ...

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