Coalescing filters remove liquid contaminants from compressed air and gas processes. They should be preceded by general-purpose filters in order to keep their clogging up too rapidly.
They typically have a lower initial pressure drop as well as higher flow rates than particulate filters. They also have faster performance and take up smaller space to install.
Difference
One of the main differences between the oil separator filter and coalescing filter filters is that the latter removes liquid droplets from gas streams. Filters that coalesce use several layers of fibers to capture the oil mist and combine with larger droplets which can be affected by gravity, and then flow into the sump at lower end of the device.
The droplets can be stored in a drainage system or collected by a lines that scavenge them and return them to the compressor system to be recirculated. Oil scavenging is an important component that increases the efficiency of the compressor and decreases the chance of contamination within the compressed air system.
When you are deciding on the dimensions of the coalescing oil filter you need to take into account factors such as volume of flow, pressure and the type of contaminants you want to be removed, as well as ability to hold dirt. Also, you should consider the fixed and incremental pressure drop across the coalescing filter element. Fixed pressure loss is caused by the newly constructed housing and element The incremental pressure drop is caused by a dirty filter element which must struggle harder to overcome the force of drag caused by liquid droplets.
Comparison
Coalescing filters are used to remove liquid pollutants as well as gas particles that are emitted from compressed air. They work by screening on the difference between different substances’ molecular weights and density. When it comes to separation of water and oil, baffle walls in the coalescing filter divert heavier oils to a drain point, while allowing water vapor to enter the element. The resultant vapor and water droplets then coalesce into large drops which drain by gravity.
Filter elements made of coalescent can be hydrophilic or oleophilic in accordance with your demands. If you decide to utilize the hydrophilic type of material that is oleophilic, it speeds up the amalgamation of the tiny droplets and will improve the drainage values.
It is vital to pick the correct housing for your coalescing filter element. It should be constructed of materials that are able to stand up to high pressures and flows. The material should also be chemically compatible to the contaminants it’s going to remove. This will ensure that the filter is efficient and effective for a long time.
Functions
Contrary to filters for oil separation, coalescing filters do NOT use the separation process to remove the oil. This sort of filter makes use of coalescence as a method to eliminate contaminating liquid aerosols in air and gas streams. This process is achieved by combining smaller droplets into bigger ones. This means that the heavier droplets fall to drain out of the system. The filter type is designed to assess its pressure and flow rates, and types and the amount of contaminants to be removed. It also includes an inlet partition to stop solid particles from entering the filtering unit.
Additionally, it has several layers of fibrous materials to hold liquid droplets and mist. As the droplets combine, they get large enough to withstand gravity. They fall to an extraction chamber located at the base of the filter. This makes it easy to get these drops removed from the gas stream, and then eliminate these from your system. It is vital because it minimizes the danger of contaminating other parts of the system. It also increases drainage rates.
Choosing the Right Compressed Air Filter
Filters for air compressors must be capable of removing aerosol and liquid droplets as well as particles. They should also be able to deal with gases, vapors and smells. The coalescing elements of filters work by making small drops of water and oil stick together (coalesce) and form bigger drops of water that are large enough to slide towards the bottom of filter where they are drained away.
Air filters are available in various dimensions and levels of filtration. It is essential to pick the appropriate loc tach nhot may nen khi filter to suit your business needs.
Making the wrong decision about your air filter is a sure way to cause problems for your business. If you choose the wrong type of filter, it is not able to remove the contaminants required by your business and will lead to a expensive waste of energy. As an example, using a charcoal filter for removing gas and odors can result in the oil being too saturated the filter and take it off in the shortest amount of period of time. It is necessary for the system to be shut off in order to replace the filter.