This is an expansion of the Scott C420 Powered Air-Purifying Respirator (PAPR) web page.
Mask, Chemical-Biological, Field M17 SeriesThe M17 Gas Mask (Wiki) was issued designed and introduced in 1959 for protection from chemical and biological agents. It was used up till the 1980s.
Canteen 1 QT with NBC M-1 Cap
Filter Element Set, Chemical-Biological Mask M13A2, NSN: 4240-00-165-5026, Contract: DAAA09-85-C-1276, Mine Safety Appliances Co, MSA p/n: 303924
M256A1 chemical detection kit
Mark I NAAK "Nerve Agent Antidote Kit"
convulsive antidote for nerve agents
M-258A1 decontamination kit
2800901 Protective hood, Randolph Monro, US Government, Jul 30, 1957, 128/201.15, 128/201.29, 2/202 -
Filtered then Exhaled air is circulated under hood to greatly improve overall protection. Works with M17 mask.
2821192 Leakproof Gas Mask, Randolph Monro, US Government, Jan 28, 1958, 128/201.15, 128/201.25 - includes hood
2910979 Canisterless gas mask, Brumfield Richard S, Frank Shanty, Secretary of the Army, Nov 3, 1959, 128/201.15, 128/206.12 -
The filter contains: Glass fibers, Organic fibers, ASC whetlerite Charcoal or filters made using patents:
2741246 Gas masks, Litchfield George R, Secretary of the Army, Apr 10, 1956, 128/201.13, 128/206.15 -
2775967 Respirator, Eugene Sovinsky, Secretary of the Army, Jan 1, 1957, 128/206.12, 128/207.11 -
3486730 Quick disconnect coupling and valve combination, Potash Norman, Us Army, Dec 30, 1969, 251/149.7, 285/244, 141/346, 285/148.21, 128/202.27 - for use in aircraft with pressurized feed
3513840 Mask inlet valve cap assembly, Potash Norman, Us Army, May 26, 1970, 128/207.12 - improved design
3635217 Drinking and resuscitation mask, Potash Norman, Us Army, Jan 18, 1972, 128/201.19, 128/202.13 -
T-84 Russian 40mm Gas Mask Set - GP-5 FilterThese were on eBay late 2017 as New Old Stock.
The Wiki page for GP-5 Gas Mask (Wiki) lists the components:
SHM-62, SHM-62u or SHN-62mu Face Piece,
Anti Fogging Lenses
The hose is mentioned in relation to a tall can type filter that would be carried in the haversack.
Fig 1 Mask
Fig 2 GP-5 Filter
Fig 3 40 mm hose
Fig 4 anti fog lenses
Fig 5 Carry Bag
Fig 9 Spare Lens kit
Fig 10 Spare Lens Kit w/Cyrillic Instructions I can not read.
It's not obvious how to change the lenses.
Soviet/Chinese Model B 40 mm Respirator Paint Spraying Mask
There are many filters available that fit the standard 40mm masks and powered breathing units designed to remove different things. No one filter will remove everything.
The activated charcoal filter (Wiki) "Active charcoal carbon filters are most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water. They are not effective at removing minerals, salts, and dissolved inorganic compounds."
BS EN 14387:2004+A1:2008 Respiratory protective devices. Gas filter(s) and combined filter(s). Requirements, testing, marking
BS: British Standard
EN: European Norm
UK Health and Safety Executive - Appendix 4 European Standards and Markings for Respiratory Protection -
Organic gases and vapor with boiling point greater than 65 deg C
Inorganic gases and vapor, e.g. Chlorine, Hydrogen Sulfide, Hydrogen Cyanide, but not Carbon Monoxide
Sulfur Dioxide, Hydrogen Chloride and other acid gases
Ammonia and organic ammonia derivatives
PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale