Home » Air Filters » Odor / Oil Vapor Removal Filters
Adsorbing filters are designed to remove vapors from the airline that a coalescing filter cannot remove. They produce air free of oil and hydrocarbons, as industries such as food processing, electronics, and instrumentation require.
Activated Carbon filters with max oil carry over of .oo3 microns
6-1500CFM Adsorbing Air Filter By Pneumatech
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Oil in liquid and vapor form is introduced into the air stream through the naturally occurring oil particles and the lubricant in a compressor. Unless the machine has been labeled as Oil-Free, the compressor will use oil as a lubricant to help remove heat from the air. As you’d expect, this causes some of the oil to mix with the air while it is hot and under pressure.
Oil needs to be removed for the same reasons as condensed water, especially in applications that work with food and pharmaceuticals. These industries have stringent standards because customers consume their products. So, if you didn’t know, you should not be ingesting oil in any way.
Proper filtration of these particulates requires planning and preparation to ensure that the particulate matter is removed without creating excess pressure drops. Pressure drops are a natural part of compressed air systems, but if the drop is too large, it can hurt the system or final product.
Some people need air that is so clean that it is better than the ambient air around us. Their process requires air that has nothing in it but clean, high-quality compressed air. There can be no oil, particulates, or even odor in the air stream. When this is the case, a little extra filtration is necessary.
An additional compressed air filter is indispensable to attain the filtration required for ultra-clean air. This is where our Activated Carbon filters come into play. With their ability to filter down to .003 Microns, they excel at removing oil vapors and odors from compressed air. Due to their size, these filters are ideally placed at the end of your compressed air filters.
If the activated carbon is the first or second filter in line, it can easily become clogged. The particulate and condensate-filled air would become stuck, causing pressure and flow rate to drop. Instead, the activated carbon should always be the last filter in line to avoid any unnecessary components in the air.
The size of your compressed air filter is determined by the size and type of particles being removed. You want to be able to remove the particles in descending size so that you do not clog the filter elements. The bigger particles will get caught as the air passes through, and smaller and smaller particles will make it through.
Consider a few things when you are looking to buy an air filter. These will be the guiding principles for selecting your compressed air filters.
This is the percentage of dust removed or extracted from the air. So, a filter sized to 1 micron would have a 99.8% extraction efficiency because .2% of the particles that size pass through the filter.
Flow rate is the air that passes through the filter in a given period, usually measured in Cubic Feet per Minute (CFM). Your filter size has to match your flow rate, so if you have a more significant flow, you will need larger compressed air filters. If your flow rate is too much or too low for your filter, it can cause unwanted pressure spikes and drops.
Flow resistance refers to the buildup of dust and debris in your filter over time. As this builds up, more dust will accumulate, causing pressure drops and restricting the flow of your compressed air. Stay on top of this by routinely replacing your filter elements and preventing extreme buildup.
These are the main concerns you should have when determining your filtration sizing. Beyond that, there really isn’t much else to keep in mind aside from pressure drops, and all that takes is a simple calculation.
Want to learn more about compressed air filters? Check out our guide on compressed air filters here.
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