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| What is the neomask material made of? |
The neomask outside material is made of high quality neoprene. Neoprene is a
hypo-allergenic and resiliently stretchable material.
The inside material is an activated carbon cloth filter (ACC). ACC was originally developed by the British Chemical
Defense Establishment (United Kingdom) as a highly efficient filter medium for protection against nerve gas and other
highly toxic vapors that might be used in chemical warfare.
The ACC Activated Carbon Cloth as been assessed and registered to meet the quality requirements of ISO 9001, EN 46001, and ISO 13485.
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| Is the neomask washable? |
| Yes. You can detach the carbon filter and place the neoprene neomask into a washing machine. To dry it, place in a dry cool place to let air dry. |
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| How do you detach the ACC Activated Carbon Cloth filter from the neomask? |
 First, turn the neomask inside out. Detach the buttons on either wings of the filter. Then from the inside of the ACC filter, turn the valve
counter-clockwise while pulling away at the other end of the valve until the two valve pieces pull apart. Repeat the same process for the other valve. Now the ACC Carbon
Activated Cloth is ready to be washed or replaced. |
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| How long do I wait to replace the ACC Carbon Activated Cloth? |
| The ACC Carbon Activated Cloth typically lasts about 6 months under normal wear-and-tear conditions. 4-6 weeks under more
harsh/polluted/dusty conditions. |
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| Where or how can I buy replacement filters? |
You may purchase replacement filters from NeoMask or their distributors and retailers.
Give us a call and we'll be happy to help you!
T: 818.993.8730
F: 818.998.2472
E: sales@neomask.net
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| What is activated carbon made from? |
| Activated carbon can be manufactured from any organic material containing carbon. Commercial carbons are made from sawdust, wood, charcoal, peat, lignite, petroleum coke, bituminous coal, and coconut shells. Activated carbon products are made from bituminous coal, coconut shell, and wood. We choose these raw materials in order to provide the best activated carbon to our customers.
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| How is activated carbon produced? |
The coal is pulverized to a very fine particle, about the size of talcum powder. The powdered coal is mixed with a binder to "glue" it back together and pressed into briquettes. These in turn are crushed and classified to the size of the desired end product. This process, called reagglomeration, creates an activated carbon that is harder and less dusty than a direct activation process. Reagglomeration also assures that the activation occurs through the granule to the core. Some direct activation processes only activate the exterior of the granule.
The sized material is heated in an oxygen void environment to avoid burning and to remove the volatile components of the coal. The carbon is activated by additional heating in a controlled environment of oxygen and steam. The activation process creates a highly porous graphitic plate structure with tremendous surface area.
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| How much surface area does activated carbon have? |
| A single pound of activated carbon has the surface area equal to 125 acres.
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| How much does it weigh? |
| Pure carbon weighs about 130 pounds per cubic foot. It is much denser than activated carbon. During the manufacturing process the structure is "opened up," creating porosity (pore volume) inside the granule. The finished product has a density between 25 to 40 pounds per cubic foot.
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| How much void space is in carbon? |
| A container of carbon is roughly 20% carbon, 40% interstitial space (the volume between the carbon granules), and 40% pore volume (the volume inside the carbon granules). Another way to visualize this is: If you had a 55 gallon drum full of dry carbon, you could add 44 gallons of water to the drum before it would overflow. Therefore, 80 percent of the drum volume is air.
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| How does the carbon remove the contaminant? |
| Once the contaminant enters the carbon, it diffuses into the carbon matrix until it enters the smaller pores where the adsorptive forces begin to take effect. Once it reaches a higher-energy area, it can no longer migrate (or diffuse) because the adsorptive force is stronger than the diffusional force. The contaminant is adsorbed to the carbon surface by the adsorptive forces (the Van der Waals forces). In this state, the contaminant is referred to as the adsorbate.
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| How much adsorbate can the carbon adsorb? |
| The amount that the carbon can adsorb is dependent upon the type and concentration of the adsorbate. Generally, the higher the concentration and the larger the molecule, the greater the amount adsorbed. The typical range experienced is about 1 to 35 weight percent. That is, one hundred pounds of carbon will adsorb 1 to 35 pounds of contaminant. When the maximum amount of adsorbate is on the carbon, the carbon is referred to as being spent or exhausted.
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| What happens when the carbon is spent? |
| The concentration of the adsorbate in the outlet from the carbon column increases as the carbon becomes loaded with adsorbate. The adsorbate concentration increases until the outlet concentration is equal to the inlet concentration because the adsorption pores are filled with contaminant.
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| How do I tell if my carbon is spent? |
| The only sure way to tell when the carbon is spent is to test the outlet of the carbon column for the contaminant being removed. Once the concentration of the contaminant is above the acceptable emission or discharge limits, the activated carbon is considered spent. The activated carbon does not change color or shape as it adsorbs contaminants. Therefore, no visual inspection will tell you if the carbon is spent. Also, you cannot "test" the carbon for being spent using commercially available "carbon testers", as each situation is unique based upon the type and concentration of contaminants. The only way to determine if the carbon is spent is to detect the contaminant in the outlet of the carbon column.
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| What types of applications are right for activated carbon? |
Activated carbon is principally used to remove low-levels (ppm or ppb level) of organic species from water, process liquids, or air.
The following is a list of activated carbon applications:
- Air stripper off-gas
- >Amine purification
- Aquarium water treatment
- Amine purification
- Carbon dioxide purification
- Catalyst protection
- Catalyst support
- Chloramines from drinking water
- Citric acid purification
- Corn syrup decolorization
- Decaffeination of coffee
- Dechlorination of drinking water
- Gasoline vapor recovery
- Glycerin purification
- Glycol purification
- Gold recovery
- Groundwater remediation
- High-purity hydrogen
- Hydrogen sulfide from drinking water
- Incinerator flue gas
- Indoor air filtration for HVAC systems
- Iron from drinking water
- Mercury removal from liquid hydrocarbons
- Organics from drinking water
- Personnel protection respirators
- Process water treatment
- Product purification
- Soil/sludge stabilization
- Soil vapor extraction treatment
- Tank venting
- Taste and odor control for municipal water
- Ultrapure water treatment
- VOC's from drinking water
- Wastewater treatment
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