Every Thing You Should Know about Self-Cleaning Filters

For how long do you clean your obstructed filter? Do you find it time-efficient and effective to clean obstructed filters? If your answer to these two questions is no, then you have come to the right place. This article will act as a guide to help you understand what an automatic self-cleaning filter system is, how it works, its benefits why you should start using one.

What Is an Automatic Self-Cleaning Filter?

Automatic Self Cleaning Filter System

Self-Cleaning filters are devices that eliminate the obstructed particles or dirt from its self after a period. In other words, when the filter holds unwanted materials, they are placed in such a way that they are flushed out or removed after a while. Self-cleaning filters come in different forms and serve different functions. They are sometimes referred to as auto-cleaning filters.

Why Should You Consider Self-Cleaning Filters?

Are you thinking of switching your filter but still in doubt? Allow me to give you five major reasons, among others, to solidify your decision.

  • Economical and efficient:

If you compare filters, self-cleaning filters are cheap and more effective than other filters. Maintaining this filter takes little to no stress. You get the value for money spent when you purchase this.

  • Market availability:

Self-cleaning filters are readily available in the market. You will find them in various sizes and different brands. The filter is designed in such a way that manufacturers make them suit your need. So, you are allowed to choose a filter with varying degrees of filtration that suit the jobs you want it for.

  • Non-stop filtering:

Filtration of the self-cleaning filter is a continuous thing. The filter continuously cleans itself while you work. In cases where you have to work for a long period, the self-cleaning filter takes the burdening of removing clog off you.

  • Contaminant holding area:

When you use a filtering device, you will need to always dispose of the contaminant regularly. The self-cleaning filter saves you that stress because it comes with a contaminant where these entities are stored. It saves you time, and you can continue working for longer hours.

  • You don’t need to be a guru to use one:

Using a self-cleaning filter doesn’t require much knowledge. They usually come with manuals that give simple step by step installation, removal, and maintenance method.

Where Are Applications of Self-Cleaning Filters Systems?

You can use self-cleaning filters for different functions. The choice of which filter you want to use will depend on the kind of work it will be doing. The following are some of the most popular cases where self-cleaning filters are used.

  • Food Processing Industry

You may use a self-cleaning filter to eliminate toxins from your food to ensure the protection of food during processing. Various foods require various filters that you can use to ensure that pollutants are removed.

Self-cleaning filters are used here for their functions and also because they can store some viable fouls that can be used in other parts and for other functions.

  • Power Generation

There are various power generation areas in which a self-cleaning filter may be used. For example, a self-cleaning filter is required in turbines to ensure effective and efficient fluid flow. Also, a self-cleaning filter is required for removing pollutants from the oil in the electric generators. You can produce electricity continuously because the filter allows steady work.

  • Water Treatment

For our consumption and other household tasks, we all need clean water. This calls for us to handle the water we use until we drink it. You can eliminate pollutants, including unwanted particles, from the water by using a self-cleaning filter. Different unwanted particles may be extracted from the water, making them safe to use depending on the size of the filter product. Using a self-cleaning filter in water treatment plants ensures that water treatment stays uninterrupted. This is due to its ability to clean itself.

  • Sewage Treatment

We all know how precious water is and how necessary it is to be stored and recycled, if possible. One method is by wastewater treatment. Sewage water treatment requires many measures that function successfully with the use of a self-cleaning filter. The benefit is that sewage water is constantly treated. Sewage water treatment facilitates water use in a variety of applications; an example is the provision of water for irrigation in farms.

  • Farming

It is very important to circulate water on your farm, and this is typically required at a continuous flow rate. The need to constantly have this water flowing is why the filter capable of self-cleaning is commonly used in the farm’s water system. A typical example, the animals on your farm will have to drink clean water. This water might have been polluted and might pose health risks to them. You will have to use a filter, and, in this case, it must be a filter that can allow a long process of work while it stores the pollutant. The irrigation of your farm is another field of use. You will need plenty of water to irrigate your farm, which can often be polluted like rivers. Therefore, before the water flows into the farm, you must eliminate the pollutants. This can be done using a self-cleaning filter that removes impurities and allows clean water flow to your farm. The size of the filter used will depend on the size of the pollutants you wish to eliminate.

Common Self-Cleaning Filter Terminologies 

You will agree that there is no understanding of a self-cleaning filter if one does not understand its basic terminologies. These terminologies are terms or phrases that you sometimes use when you speak about a filter.

  • Mesh

A mesh refers to an object that may be either wires or threads with pores that allows fluid to pass through them. They are sometimes welded, intertwined, or interwoven wires or threads. Depending on the result you like, there are different mesh sizes for your filters.

  • Effective Area of Filtration

The region of the self-cleaning filter that filtrates your liquid is the effective area of filtration. There are various areas of filtration based on the size of the filtration part. You have a wider filtering area by selecting a larger filtering device. You can also have a smaller filtration area by selecting a small filter device.

  • Screen

The screen is a cylindrical body, primarily made of metal that houses the contaminants as they are filtered. There are two types of screens —wedge-wire screens and weave-wire screens. Wedge wire screens contain steel wires with a trapezoidal cross-section. These cross-sections are parallel and have a slight distance between the steel. So, you find they have long slots of nominal filter width. These panel styles are helpful to extract 3D particles from the fluid, and they are trapped in this cross-section during filtration. On the other hand, there are discreet openings to a weave-wire screen. The 2D square-weave basically has rectangular openings, which form a weave-wire screen when joined in pairs. Depending on the size of the rectangular openings, you can have different openings of screens. They are especially important when you want to extract scaly contaminants from the fluid.

  • Degree of Filtration

The degree of filtration refers to the number of pores in the filter that influences filtration. For your filtration, you should select from various pore sizes. The choice of the filtration degree depends on your intended filtration result. That is, the quality of the resulting fluid is largely affected by the degree of filtration.

  • Suction Scanning or Focused Back Clashing

This refers to suction arising from reversing the flow of fluid through a tiny section of the screen element that goes into a nozzle. The nozzle is normally at the tip of the scanning element, which is usually rotating.

  • Open Filtration Area

The open filtration area refers to the total area that your filter covers, which is usually in square inches or square centimeters. This area the filter covers is sometimes a result of the fluid volume that is being filtered by the device.

  • Filtration and Micro-filtration

Filtration means the elimination of harmful particles from solutions. What happens is that you pass the fluid through a porous material known as a filter. Once the filter exits, it holds undesirable particles and materials as the fluid flows. The type of filter to use depends on the particle size. There are three different filtration methods you can use — cold, hot, and vacuum. The choice of which technique you want to use depends on the performance expected from the filter. For example, if you wish to remove particles from hot fluid, hot filtration is the technique to use. This method of filtration is particularly suitable for preventing crystals from forming in the filter. Cold filtration requires the use of an ice bath that easily crystallizes the solvent. On the other hand, the use of a Büchner flask, Büchner funnel, and a rubber tube connecting the filter to the vacuum source is part of vacuum filtration.

Micro-filtration refers to a particular form of filtration procedure, where a particular pore sized membrane is used for the flow of fluids. Microorganisms and micro-particles are both retained by the pore from the fluid. The greatest constraint on microfiltration efficiency is fouling. This is the aggregation and deposition process of the micro-particles within the filtration membrane pores. This occurs when the fluid parameters like temperature and pressure during the operating phase are constant. The quality and efficiency of the micro-filter membrane are decreased as this happens. Although it is possible to minimize the amount of fouling happening, it is impossible to remove the whole thing.

This means that the membrane always needs to be replaced to make sure flow is efficient.

  • Direct Flushing in Self-Cleaning Filters

The method of removing contaminants from the self-cleaning filters is known as direct flushing. This method works as the fluid flows. The direct flushing valve would open as fluid fills the buffer, guiding the fluid flow to the drainage valve. As such, fluid pressures clean the filter and extract pollutants in the drainage valve from the filter part.

  • Back Flushing in Self-Cleaning Filters

The solids collect during filtration on the filtering membrane will remain there until you collect them. You can achieve this by using backflushing. The reverse filtration flow through a membrane is usually called backflushing. The process removes the particles that have been accumulated from the membrane. You will notice that the backflush is the reverse of a direct flush.

What Is the Classification of Self-Cleaning Filters?

You can classify your self-cleaning filter in different ways. The classification depends on where your self-cleaning filter will be used. The following are various self-cleaning filter classifications that we know.

  • Self-Cleaning Air Filters

This kind of filter is important for purifying the air we breathe in, especially in air cleaning applications. They are used to making the air breathable and to remove the toxins. They are used in the coupling of air conditioners, vents, masks, etc.

  • Self-Cleaning Oil Filters

You should use a self-cleaning oil filter to filter the oil you put into equipment that requires constant oil filtration. You may use a self-cleaning oil filter for different appliances and machinery. For example, using a self-cleaning oil filter ensures the continuous functioning of industrial machines and equipment. This requires consistent production and ensures clean oil. In addition, you need a self-cleaning oil filter to filter your oil in the automobile industry. This ensures the efficiency of vehicle engines.

  • Self-Cleaning Water Filters

Self-cleaning filters are a form of filter for the elimination of toxins in water. You will find them in water circulation systems like sewage processing stations and water treatment facilities. These types of filters use the disparity in water pressure to clean themselves. What occurs is the flow of water through the inlet to the filter part. The contaminant, which is greater than the pores of the filter element, is stuck with the filter. This process continues until the water pressure differs. Air-operated ventilations open up, which redirect water flow back to the pores of the filter elements. This is usually referred to as backwash. In this way, the water will flush the contaminants on the element. In this method, the self-cleaning filter can be cleaned up repeatedly. Self-cleaning water filters consume below 1% of the water, making them efficient.

What Are the Components of an Automatic Self-Cleaning Filter?

It is important that you know the components of a self-cleaning filter if you are going to be using one. This knowledge comes in handy when you need to get a replacement part or fix the filter due to blockage or temporary delays. The parts of a self-cleaning filter are briefly explained below.

  • Motor

There must be an energy force that pushes the fluid forward to ensure that the filter functions properly. This energy is generated by the motor to clean the filter. You have to be careful about the size of your filter and the application when picking an engine for your self-cleaning filter. The motor must be able to guarantee enough energy to pump your fluid and not interrupt your application.

  • Inlet and Outlet Valve

The inlet valve is that part of the self- cleaning filter that lets in fluid during filtration. Depending on the scale of your application, there are different sizes of inlets one can have. You can ensure that the flow of fluid is maintained with respect to pressure by selecting the correct inlet scale. In contrast, the outlet is the self-cleaning filter part, which allows the fluid to flow from the filter. The fluid flows out from this point after filtration is done.

  • Suction Nozzle

The suction nozzle dumps the dirt in the dirt collector. Depending on the filter form you choose, there are various types of suction nozzles. The air suction nozzle, the water suction nozzle, and the oil suction nozzle are all in the market.

  • Drain Plug

Another component of the self-cleaning filter is the drain plug. In cleaning the filter, the drain valve plays a significant part. This part can be found at the bottom of your filter. This component removes contaminants from the filter, and this makes sure your filter works constantly.

  • Filter Element

The self-cleaning filter component that holds unwanted particles and contaminants while filtering is known as the filter element. There are different filter elements sizes, and they are designed depending on the filtration quality of the fluid you want. You may also have a number of filter part materials. You must constantly check for any necessary maintenance because they are the most active part of your self-cleaning filter.

  • Collector of Dirt

Once the filter accumulates dirt from your fluid during filtration, the pumping of the contaminants into the dirt collector happens. In the meantime, you don’t need to remove and dispose of the dirt collector until it is full. The aim is to ensure the continuity of the application process and to achieve maximum output.

How Does A Self-Cleaning Filter Work?

You need to understand how a self-cleaning filter works if you want to get one. This is particularly considering you have to understand the process of flow and filtration. The process flow refers to what happens at every stage of the working of the self-cleaning filter. I will explain the general working principles of a self-cleaning filter in this segment to you. Also, I will explain to you how different types of self-cleaning filters work.

In general, the fluid flows from the intake valve into the screen and then to the outlet during standard operations. The cleaning disc at the top position of the screen closes when fluid flows into the screen. The rinsing valve also closes to ensure that the fluid is filtered. At this point in the process, impurities begin to build up and, as filtration continues. Failure to remove the impurities may result in your self-cleaning filter not working to the optimum level, and this is done by decreasing the pressure of the fluid. That is, you must continuously remove the impurities. The change of pressure is sensed through the control unit, which is typically located on the side of the self-cleaning filter.

The control unit initiates the rinsing valve’s opening. Once the rinsing valve is opened, the contaminants flow away from the screen. The power machine begins to close the cleaning disc. This, in essence, will increase the speed of the fluid between the disc and the screen. Due to the Bernoulli effect, the pressure will decrease at this point. This pressure decrease causes particles from the screen to be separated and drift upwards. After completion, the cleaning disk moves up to an idle position that cleans the screen further. The rinse valve shuts down while the cleaning disk is inactive so that the machine comes back to normal function.

To ensure continuous operations, the fluid is continuously circulating through the whole process. Friction will easily cause the filter components to wear out. This means that you also have to continue sourcing new components. Cleaning the disc and monitoring the screen so that they don’t touch each other is a way to mitigate this. This is the general working theory of a self-cleaning filter. There are, however, various kinds of self-cleaning filters on the market. And as a result of that, you must understand the specific functioning of each type so that it is easy to use.

Here are the operating principles of the different types of filters for self-cleaning:

  • Direct Flow Self-Cleaning Filters

The filter mesh preserves all pollutants or contaminants as part of the operating theory of this type of filter. The dirty fluid washes the filter part as pollutants begin to accumulate. Usually, the filter portion lasts from 1-2 years, and this means you won’t have to replace the element that often. You will also notice that direct flow filters support a drain valve and a ball valve at the bottom. The ball valve opens the drain valve so that the pollutants will get out of the system. You should install the filter on the fluid system to allow proper filtration using a flexible tube or plastic pipe.

  • Backwash Self-Cleaning Filters

The backwash self-cleaning filter consists of the upper and lower main parts. The upper section is closed as the fluid flows into the lower section from the outside during the filtration process. The ball valve opens to trigger the backwash, and the filter portion closes. This leads the fluid supply to avoid diverting it to the filter’s narrow top and ensures that you can clean the filter. Water runs back into the backwash filter at this time. The flow helps turbines to rotate, washing the bottom of the filter in an internal-external direction. This ensures that the lower portion of the filter during the filtration process is still clean. Backwash self-cleaning filter continues the filtration by shutting the ball valve.

What to Consider When Buying Self-Cleaning Filters?

The ultimate purpose of this guide is to help you make an informed choice when choosing a filter for your application – a filter that will provide you long-term service. While a wide range of self-cleaning filters is available, it can be a struggle to get one that fits your purpose. Here are a few things you will need to consider to help you pick the correct filter.

  • Type of Contaminant

The first thing you need to recognize is the sort of contaminant in your fluid. Pollutants have varying sizes and need different filters for purification. For example, certain fluids contain micro contaminants, so a micro self-cleaning filter must be used to eliminate them. Pollutants can also come in large quantities and need to be filtered using a large self-cleaning filter.

  • Functions of the Filter

Another factor to consider is the fluid you are using and the intensity of the filter’s work. You should know the fluid’s state for strain, temperature, and pressure. You can select the best self-cleaning filter for your application by maintaining the right strain. Understanding the flow of the liquid would help you consider where the filter should be fixed. This also guarantees the reliability service and decides what form of self-cleaning filter you will need using your program’s template. Various self-cleaning filters can be used, depending on the fluid’s temperature.

  • Labor and Cost

The labor cost and the expense of installing and removing the self-cleaning filter are other aspects you have to remember. This is particularly relevant when the expense of an auto-cleaning filter is taken into consideration. You must also not forget that your program would impact the downtime of your self-cleaning filter. In general, downtime can be avoided to ensure that the application is processed optimally.

  • Disposal of Contaminant

How are you going to remove toxins to ensure environmental safety? That is a consideration that you must have and harbor when selecting your application for a self-cleaning filter. Some chemicals are environmentally safe and can thus be quickly disposed of. Any pollutants can nevertheless be harmful to the atmosphere, especially in industries. In such situations, you must check for proper disposal approaches to avoid environmental impacts. In doing so, the cost of such disposals would need to be taken into account as well.

  • Filtration Efficiency

You must understand the level of filtration you need when you select your self-cleaning filter. Various self-cleaning filters give you different levels of efficiency. The purpose of using a filter must be effectively met. You do not want to filter fluid and still have some contaminants in the result and solvent gotten.

  • The essence of the application

The essence of the application is another determinant. That is, is it a continuous or a batch process? If this is a constant operation, it means that a self-cleaning filter must be added, and you won’t have to interrupt it. This is particularly valid as the contaminants are eliminated automatically by the filter. If it’s a batching operation, you have to consider the batching time to find a filter that operates effectively during that time after considering factors such as temperature, weather pressure, etc.


At this point, you're definitely convinced about choosing that self-cleaning filter. How the self-cleaning filter works might be a little confusing considering that you are probably new to some of these terminologies but don't be swayed. With time you will understand them. The primary objective of this article is to help you locate the perfect self-cleaning filter for your application. Please email us today if you are looking for a self-cleaning filter that fits your work. We provide the highest standard self-cleaning filters and the best support to go with it among our services.

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