![]() Because of their short protection time those were designed to be one-time use only. Small filters were sealed with a plastic "pop-it" cover and a wax paper on the bottom. ![]() The main difference was mounting system - those were mounted directly to the mask - and their protection time which ranged from 12 minutes up to 240 minutes. Similarly to their large counterpart they lacked a particulate layer. Small filters were marked with a "M" symbol (M - mały, small) and their design has not been seen in Poland before. The filters were sealed with a plastic cap on top and a rubber plug on the bottom. Because of their size and weight those were carried in a bag and were connected to the mask with a corrugated hose. It's protection time ranged from 40 minutes for ammonia filters up to 8 hours for mercury vapor filters. ![]() Large filters were marked with a "D" symbol (D - duży, large) and were based on Polish E-014 canister but lacked a particulate protection layer - entirety of the volume was occupied by compressed activated carbon impregnated with helper substances. Industrial non-combined (no particulate protection) filters produced by FASER and WSK "DELTA" in Poland between around 1960-1980. User needs to keep track of use time, substance and it's concentration. Mix of acrylonitrile and methyl acrylateĪfter the first use the filter can be used only for protection against the initial substance.Notable substances against which the P-22/1-W was tested: Like any other filter the oxygen level must be at least 17% by volume. ![]() It cannot be used when more than one mentioned substance is present in the atmosphere or the concentration of the substance exceeds the limit set by the producer. The filter protects from 66 gaseous substances. Old P-22/1-W's are Rd40x4 (GOST) threaded, while those from late 90's and early 00's are Rd40x1/7" (STANAG) threaded. Interestingly on older versions the "E-014" symbol was still embossed on the canister.īecause of a large time span of their usage and production the changes of the thread have occured. These filters were based on Polish E-014 but were shorter. There were at least five variants of this filter, in chronological order: grey (70's), red (80's), raspberry and cherry red (90's), silver (90's and early 00's). – Flow ability of drinking device = 200 cm3/min.Industrial non-combined (no particulate protection) filters produced by Wytwórnia Sprzętu Komunikacyjnego and later by PSO MASKPOL. – Weight of complete gas mask (facepiece with – Exhalation resistance in continuous air flow – Inhalation resistance in continuous air flow with
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