Emission Control
American Environmental
Fabrication & Supply, LLC
Natural Gas Conditioning
Gas Separation Systems
VOC Biofiltration Systems
Granulated Carbon Systems
VOC Concentrators
Automated PLC Controls
Equipment Inspections - Installation - Rebuilds
Low NOx Burners
PSA Systems
Benefits of Renting vs. Owning Air Pollution Control Equipment
We have a ready to use air pollution control fleet or can design a specialized system for your plant operations. Some of the available systems include:
Granulated Activated Carbon (GAC) Systems, Biological Oxidation Systems, Wet Scrubbers, Regenerative, Catalytic and Direct Fired
Thermal Oxidizers
. Rentals range from 6 months to 5 years with flexible options.
VOC Monitoring
Lower Explosive Limit Equipment
At gas vapor concentration in air below the LEL there is not enough fuel to continue an explosion or
flame. Concentrations lower than LEL are "too lean" to burn on their own. Methane gas has a LEL
of 5% (at any concentration below this limit, if a source of ignition is present it is not enough
concentration to cause an explosion).

When methane (CH4) concentration reaches over the 5% an explosion can occur if there is an
ignition source. Each combustible gas has its own LEL concentration. These percentages should
not be confused with LEL instrumentation readings. Instruments designed and calibrated to read
LEL also read as percent values. A 5% displayed LEL reading for methane for example would be
equivalent to 5% divided by 5.1% methane by volume at 20 degrees C.

Thermal oxidation systems can release a significant quantity of energy during the oxidation process.
If the system is not designed properly, this energy release could result in harm to operating
personnel or damage to the thermal oxidizer.

In regenerative thermal oxidizers (RTO) safety issues relate primarily to the potential of fire or
explosion from auxiliary fuels or from waste streams with high VOC loadings. Common causes of
accidents include condensation and collection of VOC's in the ductwork, process upsets resulting in
unexpected high concentrations VOC's, inadequate or missing safety-related detectors or safety
interlocks, improper placement of detectors, reduction in ventilation air and equipment or
instrumentation failures.

Listed are some of the LEL for more common gases:

Acetone: 2.6% - Benzene: 1.2% - n-Butane: 1.6% - Butyl Alcohol: 1%, - Cyclohexane: 1.3%
Diesel Fuel: 0.6% - Ethane: 3% - Ethylene Glycol: 3% - Gasoline: 1.4% - Hydrogen Sulfide: 4.3%
Isopropyl Alcohol: 2% - Methyl Alcohol: 6% - Mineral Spirits: 0.7% - Styrene: 1.1% - Xylenes: 1%
(RTO) controls, regulates and continually
monitors gas vapor concentrations to be
maintained outside the lower explosive limits on
all thermal oxidizer equipment (Biological
Systems N/A). This is a major consideration
when purchasing your thermal oxidizer system
as it relates to occupational safety and health.

Lower Explosive Limit (LEL): The explosive limit
of a gas or a vapor is the limiting concentration
(in air) that is needed for the gas to ignite and
explode. The lowest concentration (percentage)
of a gas or a vapor in air capable of producing a
flash of fire in presence of an ignition
source(arch, flame, heat).
Toll Free: +1 (866) 467 - 9374
Main: +1 (918) 708-1253
© 2009 All Rights Reserved.   Visit our sitemap page for more information or contact the Webmaster.

American Environmental Fabrication & Supply Logo
Product Inquiry

Treatment Information
Helpful Equipment Information
Helpful Links
Implement proven equipment designs with
chemical, thermal and biological reactions
that achieves the required process result.
Results shall be based on reaction rates
and proper control logic.
Our Corporate goal is to implement the
correct design criteria with the use of
proper metals, instruments and controls to
achieve the required result with the least
amount of maintenance and associated
energy costs.
We pride ourselves in going the extra mile
before it leaves the plant. It is our way of
knowing that you are receiving correctly
designed equipment to meet your specific