The last home I purchased had an all-seasons room, but the sellers told me the air conditioner that controlled the room temperature wasn’t working. When I moved in and tested the unit, the sellers were correct that it did not run. I started breaking it down and thought that maybe it could use a good cleaning. During this I found the filter, black and covered with pet fur. It was a washable filter so I cleaned it and let it air dry as I continued to clean remaining areas of the unit. When I put the filter back in and tried running the unit it was a miracle, it was running and producing cool air. I did nothing other than clean and clear the filter, no replacement parts, no tweaking and no repairmen.
I tell this story to many people now as it also relates to appliances, cars, lawn mowers and now I emphasize filters for compressed air systems. Using auto drain filters and oil removal filters is imperative to keeping your air clean before it gets to your tooling and equipment. Keeping water condensate and particulates contained to your filters is critical to the operation and life of your tooling and equipment. Older compressed air lines can begin to rust or corrode inside, creating scale which can jam and cause inefficiencies. Sediment and other contaminants will build up and could cause damage to your compressed air systems.
EXAIR carries multiple sizes and types of compressed air filters available from stock. Our Particulate and Coalescing filters can be found in our catalog and online (use the link above). If you have an application and need help selecting and sizing the right filter for your needs please contact one of our application engineers by calling 800.903.9247.
I read a white paper from Parker Hannifin about compressed air filters. The idea behind the paper was to remember your filter replacements. Compressed air can be dirty with water, oil, pipe scale, etc. As the filters capture the contamination, it will start to build pressure drop. Remember, pressure drop is a waste of energy in your compressed air system.
Majority of EXAIR products use compressed air for cleaning, cooling, conveying, static elimination, coating and more. To help keep them running efficiently, it is important to supply them with clean, dry, pressurized air. EXAIR offers a line of Filter Separators and Oil Removal Filters to supply quality air to your equipment. In this blog, I will explain the two types of filters that we carry and the maintenance requirements. Filters and preventative measures can play an important part in your compressed air system.
Filter Separators are used to remove bulk liquid and contamination from the compressed air stream. They utilize a 5-micron filter with a mechanical separation to help remove large amounts of dirt and water. This type of filter would be considered the minimum requirement for filtration. Most of the Filter Separators come with an auto-drain to automatically dispense the collection of oil and water. EXAIR offers a variety of port sizes and flow ranges to meet your pneumatic flow requirement. For maintenance, the filter elements should be changed once a year or when the pressure drop reaches 10 PSID (0.7 bar), whichever comes first. I created a list in Table 1 below showing the correct replacement element kits for each model number. And for any reason, if the bowl or internal components get damaged, we also have Rebuild Kits as well. Just remember, the air quality is very important for longevity and functionality of your pneumatic systems and even for EXAIR products.
The Oil Removal Filters can make your compressed air even cleaner. They work great at removing very small particles of dirt and oil. They are made from glass fibers and can remove particles down to 0.03 micron. They are designed to collect small particles and to coalesce the liquid particles into a large droplet for gravity to remove. Because of the fine matrix, Oil Removal Filters are not great for bulk separation. If you have a system with lots of oil and water, I would recommend to use the Filter Separator upstream of the Oil Removal Filter. As with the Filter Separator, the filter element should be changed once a year or at a pressure drop of 10 PSID (0.7 bar). EXAIR also offers a variety of port sizes and flow ranges. Table 1 below shows the replacement Element Kits as well as the Rebuild Kits. If the application requires very clean compressed air, the Oil Removal Filter should be used.
By using EXAIR filters, they will clean your compressed air to prevent contamination on parts, performance issues, and premature failures. As an ounce of prevention, you should add the replacement elements in stock and enter them in your preventative maintenance program. With quality air, your pneumatic system and EXAIR products will provide you with effective, long-lasting performance without any maintenance downtime. If you would like to discuss the correct type of filters to use in your application, you can speak with an Application Engineer. We will be happy to help you.
When operating any of your Intelligent Compressed Air Products, something that often gets overlooked is the importance of delivering clean, dry air to those point-of-use products. Many of our products have very tight orifices to help reduce the volume of compressed air they consume. In addition, most have no moving parts to wear out and require no maintenance. That is, unless you’re using unfiltered compressed air.
Rust and scale are commonly found within the distribution system inside your facility. Old iron pipe and receiver tanks are the common culprits. A common misconception is that the air is already filtered as it exits the compressor. While this may be true, there’s still places in the distribution system that can cause issues downstream.
To eliminate the hassle of taking things apart to periodically clean, EXAIR recommends installing a point-of-use filter for all of our Intelligent Compressed Air Products. Kits are available for purchase that come with a properly sized filter to ensure your air is sufficiently clean. To see how quickly debris can clog your products, check out my video below demonstrating the difference between dirty and clean air with a Model 110006 6″ Super Air Knife.
If you’ve already purchased and installed products without filters, it’s never to late to go back and install one. Contact an EXAIR Application Engineer today and we’ll be happy to help you determine the proper size for the volume of air you’re products need.
Last week I pointed out the important locations for measuring your compressed air system pressure throughout your compressed air system. One of the critical points to measure system pressure was before and after each filter. This leads into another question that I receive every once in a while, “How do I tell when the filter needs to be changed?” The answer to this is easy, when you see more than a 5 PSIG pressure drop across the filter. This means that the element within the filter has become clogged with sediment or debris and is restricting the volume available to your downstream products.
This can lead to decreased performance, downtime, and even the possibility of passing contaminants through the filter to downstream point of use components. In order to maintain an optimal performance when using EXAIR filter separators and oil removal filters, monitoring the compressed air pressure before and after the unit is ideal.
Replacement filter elements are readily available from stock, as well as complete rebuild kits for the filter units. Changing the filters out can be done fairly easily and we even offer a video of how to do it.
The life expectancy of a filter element on the compressed air is directly related to the quality of air and the frequency of use, meaning it can vary greatly. If you tie a new filter onto the end of a compressed air drop that has not been used in years, you may get a surprise by the filter clogging rather quickly. However, if you maintain your compressor and your piping system properly then the filters should last a long time. Generally we recommend checking your filters every 6 months.
If you have questions about where and why to filter your compressed air contact us.