![]() The Chemical Filtered Rating – This is the letter designation and color-coded rating on the filter canister.A2 B1 E1 K2 P3… What does it all mean?įor CE certified gas masks and filters, there are 2 main components to determining which filter is right for you (visit for more information on NIOSH CBRN): When you select a 40mm filter (one that filters out the chemical or particulate you are needing protection from), you need to make sure it filters out high enough concentrates for the job or situation you may be in, and you need to know how long they last – both the shelf life for emergency use and duration of the canister. Some general guidelines on when selecting a 40mm gas filter Parcil Safety is currently testing to the EN / CE standards, so we will focus on that one for our 40mm filters. The most common rating systems are governed by the US (NIOSH) and European Standard (EN / CE). These filters typically have a particulate filter on one side and a gas and vapor filter on the other side, and are used when both types of protection are needed. Combination filters: Combination filters are designed to remove both particulates and gases/vapors from the air.These filters are typically classified according to the types of gases and vapors that they can remove, as well as their capacity for absorbing these substances. Gas and vapor filters: Gas and vapor filters are designed to remove specific gases and vapors from the air.They are typically classified according to their ability to filter out particulates, with classifications ranging from N95 (95% efficiency) to N100 (99.97% efficiency) or P1 (80% filtration) to P3 (99.9%). Particulate filters: Particulate filters are designed to remove solid particles from the air, such as dust and dirt.There are several common type of 40mm respirator filters, including: ![]() Read the differences between CBRN, NBC or CBA-RCA in our explainer article. CBRN, NBC or CBA-RCA rated filters are also typically NATO 40mm. NATO 40mm filters are often used in conjunction with other protective equipment, such as gas masks and protective suits, to provide a high level of protection against a wide range of hazards. These filters are typically used by military and law enforcement personnel to protect against a variety of hazardous substances, including chemical gases and particulates. NATO 40mm filters are protective filters that are designed to be used with gas masks and respirators that have 40mm filter threads, but they are also designed to meet the performance requirements of the North Atlantic Treaty Organization (NATO), which is a military alliance of 30 countries from Europe and North America. Is there a difference between NATO 40mm and a standard 40mm Canister? The activated carbon in the filter works to adsorb (not absorb) harmful chemical gases and particulates from the air, making it safer to breathe. These filters are typically made of activated carbon, which is a form of carbon that has been treated to be highly porous and able to absorb chemical compounds. In general, 40mm gas mask filters are protective filters that are designed to be used with gas masks and refers to the standard size of the filter threading, which allows the filter to be used with any gas mask that has 40mm filter threads. One potential situation may be WW3 ( check out our guide to surviving WW3 here). If you’re looking to protect you and your family in an emergency situation, biological or chemical attack, or in a survivalist or prepping situation, then you will most likely be looking for a gas mask that takes NATO 40mm threaded filters. Today, we will be just focusing on the 40mm filters. Proprietary filter attachments include using a threaded, snap-in, or push-to-connect design. There are three main filter attachment types – 40mm, industry standard bayonet, and manufacturer’s proprietary filter attachments. You have different filter attachment types, different chemical filtering capabilities, and different filtration ratings. In the respiratory protection industry, it can be difficult to determine what type of filter to go with.
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