The Strela filters were a series of box filters based on the MO-2 that were manufactured in the Soviet Union and formed part of early post-war industrial kits and setups. They were first made in the 1950s and probably saw use up until the late 1960s or 1970s.
Overview[]
Unlike later Soviet box filters, the Strela filters use a plastic plug to seal the intake rather than a rubber plug. The intake on Strela filters is also slightly smaller than later Soviet filters.
Some Strela filters are stamped with 'GOST 10182-62'. This was a Soviet industrial technical standard which these filters conform to. This standard possibly came into effect in 1962 (hence the end number '62'), this explains why pre-1962 Strela filters do not have this GOST stamp on them: because the standard did not exist at the time.
Kit[]
When used in conjunction with a Type 'A' bag, ShM-41 or MM-1 and hose, this filter formed an industrial kit. This kit was given the designation 'Д2гу' (D2gu).
List of the filters[]
|
Type |
Colour |
Protective effect |
Modern protection level |
|---|---|---|---|
| A (A) | brown | against vapors of organic compounds (gasoline, kerosene, acetone, benzene, toluene, xylene, carbon disulfide, alcohols, ethers, aniline, organohalogen compounds, nitro compounds of benzene and its homologues, tetraethyl lead), phosphorus and organochlorine toxic chemicals | A |
| A (A) | brown with vertical white line | the same as A but with a particle filtration layer | A P3 |
| V (B) | yellow | against acid gases and vapors (sulfur dioxide, chlorine, hydrogen sulfide, hydrocyanic acid, nitrogen oxides, hydrogen chloride, phosgene), organophosphorus and organochlorine pesticides | B |
| V (B) | yellow with vertical white line | the same as V but with a particle filtration layer | B P3 |
| G (Г) | veritcal black - yellow | against mercury vapors, organic mercury, toxic chemicals based on ethylmercuric chloride | Hg |
| G (Г) | veritcal black - yellow with vertical white line | the same as G but with a particle filtration layer | Hg P3 |
| E (E) | black | against arsenic and phosphorous hydrogen | B |
| E (E) | black with vertical white line | the same as E but with a particle filtration layer | B P3 |
| KD (КД) | gray | against ammonia, hydrogen sulfide and their mixture | BK |
| KD (КД) | gray with vertical white line | the same as KD but with a particle filtration layer | BK P3 |
| M (M) | red | against carbon monoxide in the presence of organic vapors (except for practically non-sorbed substances, for example, methane, butane, ethane, ethylene, etc.), acid gases, ammonia, arsenous and phosphorous hydrogen | ABEK CO |
| SO (CO) | white | against carbon monoxide | CO |
| BKF (БКФ) | olive green with veritcal white line | against acid gases and vapors, organic vapors, arsenous and phosphorous hydrogen, dust, smoke and fog | ABE P3 |