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COVID-19 UPDATE: Due to an unprecedented spike in order volume and inquiries, our lead times on shipping, along with the time it takes us to respond to your questions has increased. NBC-77 SOF filters are now IN STOCK AND READY TO SHIP, and your order will be shipped in the sequence in which it was received. Please note, that even though the product is in stock, there is still a lead time of about three to five days considering current sales volume.
We appreciate your patience as we work through this, and ask that you read all product descriptions carefully before reaching out with questions. Each product page has a Q&A section, so please review all Q&A sections across the website before reaching out.
If you have a question about a product that hasn't already been asked, please click on "ask a question" in the Q&A section to help others seeking information.
The NBC-77 SOF filter canister, in combination with a full-face mask, mouthpiece assembly, or PAPR, reliably protects air passages against a wide range of harmful and highly toxic substances including all known CBRN agents.
The filters are produced with standard round threads according to STANAG 4155 (EN 148- 1)- Rd 40x1/7". The filter components are made of hard plastic. This results in a very robust product that is extremely durable against shock and impact damage in operational use.
- Compatible with standard 40mm NATO threaded respirators, which are widely available.
- 20-year shelf life - save money long-term by not having to replace your filters every 5 years
- Used by military personnel, CBRN specialists, and special operations forces all over the world
- Filter all known CBRN agents, including radioactive iodine, rated for A2B2E2K2HgSXP3 D R.
- Certified by European agencies and has the “CE” symbol. Compliant under EN 14387:2004 + A1:2008
|Technical Data||Breathing Resistance in Pa Breathing Resistance in Pa|
|Diameter||110 mm||@ flow rate 30l/min. EN 1) NBC-77 SOF 260 <140||@ flow rate 95l/min. EN 1) NBC-77 SOF 980 <600|
|Weight||335 g ±5%|
|Storage time||20 years (factory sealed)|
|Type and Class Particle filter efficiency @ flow rate 95l/m||Particle filter efficiency @ flow rate 95l/m|
|A2 - organic gases and vapors||SX - CG, CK, PS||Sodium Chloride NaCl (S) Paraffin oil (L)||EN 99.95 99.95||NBC-77 SOF >99.999 >99.999|
|B2 - inorganic gases and vapors||P3 - particles|
|E2 - acid gases and vapors||D- dust|
|K2 - ammonia and amines||R- reusable|
|Hg - mercury vapors||REACTOR - radioactive iodine|
1) Standard EN 14387+A1
2) The filter was tested on dolomite dust clogging
3) Radioactive iodine and its organic compound - methyliodide¹³¹ acc. to standard DIN 58621
The filter canister in connection with a suitable respirator or PAPR provides protection against solid and liquid particles, pepper spray (OC), smoke-producing substances, radioactive particles, bacteria and rickettsia, fungi, toxins, viruses, riot control agents (lachrymators, sternutators, vomiting agents), blister agents (vesicants), choking agents, blood agents, nerve agents, incapacitants, herbicides, pesticides, and TIC, such as bromoacetone, CS, CR, CN, CNC, CNS, CA substances, organic compounds of arsenic - diphenyldichlorarsine - CLARK I (DA), diphenylcyanoarsine - CLARK II (DC), adamsite (DM), diphenyldichlorarsine (DA), ethyldichlorarsine (ED), methyldichlorarsine (MD), mustard gas (H), sulphur mustard gas (HD), T-mustard gas, Q-mustard gas, nitrogen mustard gases (HN1, HN2, HN3), lewisite (L), mixed mustard gas (H-L), phosgene oxime (CX), phosgene (CG), diphosgene(DP), chloropicrin (PS), hydrogen cyanide (AC), cyanogen chloride (CK), arsine (SA), G-agents: sarin (GB), cyclosarin (GF), soman (GD), tabun (GA), IVA (GV), V-agents: VX, VR, VE, VG (amiton), VM and toxic industrial chemicals such as: fumes of organic or inorganic acids, hydroxides, organic solvents with a boiling point above 65° C, ammonia, amines, inorganic and acid gases, agricultural chemical combustion gases, other toxic substances, e.g. benzene, toluene, vinyl chloride, fluorine, hydrogen fluoride, sulphur oxides, chloroacetic acid, aldehydes, mixtures of inorganic acids, and organic substances, mercury vapors, radioactive iodine, organic compounds of iodine (Iodomethane, 129, 131), radioactive particles, etc.
|Testing Gas||Concentration of Testing Gas||Breakthrough Time in Minutes EN||NBC-77 SOF||DAC in Grams NBC-77 SOF|
|Hg||Mercury||Hg||-----||13 mg/m³||100 hours||>170 hours||>3.900|
|REACTOR||Methyloidide₁₃₁||CH₃I||-||-||2 hours||>2 hours||-|
Breakthrough time of a filter is tested according to EN 14387+A1 at humidity 70% and flow rate 30 l/min, which is equivalent to the volume of air per minute used by an average person carrying out medium heavy work. The approximate lifetime (usage time) of a filter may, under normal conditions, calculated by comparing the concentration at the workplace and the minimum Dynamic Adsorption Capacity (DAC) for the filter.
STORAGE AND MAINTENANCE:
The filters are sealed in plastic bags by the manufacturer. Store the filters unopened in a clean place at even temperature, most appropriate at -5 to +30°C and relative humidity below 80%. Sealed filters tolerate also conditions of -30 to +50°C and RH below 95%. The storage period (month and year) for filters is marked on the filter label. Do not try to regenerate the filters. Never clean the filters with compressed air or compressed water.
After use, the filters are special refuse. Make sure that they are disposed of according to the filtered substance (gases or particles) in accordance with current waste treatment regulations. If the product is to be disposed of, it should be dismantled from the respirator and disposed of as solid waste. Please see local authority regulations for disposal advice and locations.
QUESTIONS & ANSWERSAsk a Question
I am aware that a P3 filter is required to block the coronavirus. Which one of your filters is P3?
MIRA Safety filters (NBC-77 SOF, VK-450, DOTpro 320) are classified as "combined filters" and contain a P3 filter along with activated carbon. For those that don't know what P3 means, it is a rating for a particle filter that blocks 99.9999%+ of particulates. As viruses travel in liquid aerosols and particulates, this filter (when coupled with a full face respirator) would prevent the coronavirus from entering your breathing passages and eyes.
How long does a filter last once it's opened?
Filter use time depends on a few factors, including atmospheric conditions, contaminant type, concentration, along with your breathing rate. As a general rule of thumb, we would suggest having two filters per person per day for emergency evacuation purposes. If you'd like specific data on use time, you can look at the brochure that goes into breakthrough times along with the application.
If the NBC-77 SOF filter was to be completely submerged in water for a period of time, would it remain functional afterwards?
The NBC-77 SOF Filter is not meant to be fully submerged in water, and we do not have any data to show if it will be effective. However, the installed P3 filter does act as a hydrophobic barrier to heavy rain, decontamination showers, etc. This filter was specifically designed to prevent water from entering the lateral side (the first point of contact for air traveling into the filter).
Will the NBC-77 SOF filter remain functional after exposure to heavy rain, heavy snow and water/chemical decontamination showers?
Yes, it will, as the installed P3 filter has a special hydrophobic coating, specifically for use with decontamination showers and wet conditions.
Does this protect against smoke, if so how many times do i need to replace with the smoke
No, it does not. You would need the VK-450 filter. Unfortunately, it is currently unavailable. we are expecting the next batch to arrive at the end of September.
Once it comes, we will fill all backorders, and then do an email blast for remaining stock.
Will this fit the Scott 3M M110 Dual Lens Gas mask? How does this compare to the Scott CBRN filter?
Yes, it will, as the Scott gas mask uses a 40mm NATO threaded filter. I would suggest looking at the filter technical specs to see the difference. From first glance, it seems like the NBC-77 SOF is more capable as most contaminant filtration is rated at 5000ppm, where the Scott filter is 1000-1500ppm.
Will these filters fit a MSA millennium gas mask and a M40 gas mask?
Yes, they will, as all are threaded in the 40mm NATO configuration.
If I work with viral vectors everyday, does it mean I must have a new filter everyday? $80/day?
Yes, you would need a new filter every day, but you wouldn't necessarily need a high-end CBRN filter. For viral particulates, experts recommend using a P100 (P3) filter. The most affordable product we have available with P3 protection is the ParticleMax P3, which retails for $150 for six units.
Will this fit an S10 mask?
Yes, it will, as both are threaded for 40mm NATO.
Just to be clear, can I store a filter in a freezer bag under conditions written above, once it's opened?
You can re-seal a filter after it's opened, but we cannot guarantee that it will function the same as a freshly opened unit. As stated in previous Q&As, all figures are for freshly opened filters, as there are many variables that come into play once a filter is opened and/or used.
Does this filter fit the GP-5 gas mask?
No, it will not, as the GP5 uses old 40mm GOST threading.
Will this fit the 3M FR 7800B CBRN Mask?
Yes, it will, as both are threaded for 40mm NATO.
Would this be compatible with the North by Honeywell Small Elastomer Full Face 5400 Series Dual Cartridge Facepiece?
No, it is not compatible as the North mask is not threaded for 40mm NATO filter cartridges.
What level filter will protect me from the Coronavirus and will this filter fit the MSA millennium gas mask?
For viral filtration, you would need a P3 particle filter (all of our filters have a P3 built-in). As all of our filters are threaded for 40mm NATO, they will all fit the MSA Millenim mask.
Does this filter fit the Polish MC-1 gas mask?
Yes, it does, so long as it's in 40mm NATO configuration. As this is an old mask it might be threaded in 40mm Soviet GOST. Make sure to double-check before making a purchase.
Will these filters work with an Avon C50 to provide proper CBRN threat protection?
Yes, they will, as both are threaded for 40mm NATO.
will these filters fit on Soviet GP5 gas masks?
No, they will not, as they are threaded for 40mm NATO, and the GP5 is threaded for old-style 40mm GOST.
Will these filters fit Israeli gas masks?
Yes, they will, as both are 40mm NATO threaded.
How to properly clean the mask? How to properly dispose of a used filter? For both, in a case where you may fear you were in a contaminated area.
There are many cleaning products on the market for gas masks, and each is created for different purposes. As decontamination is a field of study on its own, we would suggest doing independent research and training before purchasing cleaning products. For viral threats, we have heard that Allegro 5003-U is a good product from industry experts. We do not sell it on our website, but you can find it in shops across the web. Filter disposal would depend on local laws for toxic waste disposal. Please check with local authorities as laws differ from county to county, state to state, and country to country.
Why are these masks not NIOSH approved? Is it primarily because of geographical usage?
Precisely. Traditionally, these masks were used by professionals in the EU, the middle east, along with eastern-European counties. Both the CM-6M and CM-7M are EN 136 CL 3 (special purpose) certified. If you look through and compare NIOSH testing to EN, you will see that EN standards are just as stringent as their NIOSH counterparts. NIOSH does not determine quality by any means, just an extra piece of certification as mandated by OSHA for private sector professional use. Keep in mind, government-owned agencies are not subject to OSHA and can use non-NIOSH masks/filters. This includes police, fire brigades, first responders, etc. All of which are our customers in the US.
How long will a NBC-77 SOF filter protect in non-contaminated air against viruses?
As viruses travel in particles and liquid aerosols, this filter will protect you for as long as you can wear the mask (several days). Keep in mind; if you are in a contaminated environment, you would need to decontaminate properly before removing your protective gear, and then dispose of the filter as there is no way to regenerate it. Once the filter is used in a contaminated environment, it is considered toxic waste.
I purchased these for the 20 year shelf life, which is fantastic, then a while later I thought about it and decided I really wanted the upgraded CO/smoke particulate filters they sell, (which I initially debated and didn't do because of the 10 year shelf life). Anyway, the company was super responsive and helpful - and they took it back though it was outside of the return window. Love that they do a discount for veterans and LE personnel, too, which basically negated any restocking fee in my case, which was awesome. Good company. Love that the filters are shrink-wrapped, too. I printed the technical data they have above on the filters in the description so that it's a quick reference to store with the filters.
Best product on the market, hands down.
Thankfully we have not needed to use it yet, however the level of customer support and dependability of MIRA SAFETY and its personnel has been fantastic.
Great mask and works great
If I open one of the filters and use it for a bad air day (AQI 250+), how long can it remain effective (without) use until the next time it is needed (fire season in CA)
That depends on a number of factors, including your breathing rate, the contaminant, concentration, and atmospheric conditions. Generally speaking, for safety purposes, you should swap your filter after a full day of use, no matter the threat.