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Different Types of Self-Cleaning Filters

Feb. 24, 2023

In any system without adequate filtration, pipes can acquire build-up in them that can cause the system to become less efficient. The effects of dirty water in the system can cause excessive scale buildup, clogged equipment, or poor pump performance. All of these can lead to extensive maintenance which causes the system to be shut down and expenses to increase. Self-cleaning filters help eliminate all of these issues by cleaning themselves routinely based on the parameters you set for the system.

There are two major types of self-cleaning water filters: mechanically cleaned filters and tubular backwash filters. 

A Breakdown of How Automatic Filters Clean Themselves

Self-cleaning filters utilize system pressure to clean themselves. The rigid cylinder screen inside the filter strains the particles from the water source, trapping the debris inside. This buildup can cause differential pressure from the inlet to the outlet. When the pressure differential reaches its set control, a flush valve opens. This creates a low-pressure flow for the suction nozzles to then vacuum the debris from the filter.

Advantages of Self-Cleaning Filters

Automatic self-cleaning filters come with many advantages, but perhaps the biggest of them is that they are low maintenance, and because of this they are an excellent choice for remote sites since they require no operator intervention. Another major benefit of industrial self-cleaning filters is that they clean themselves while the system is still running. This saves the user money, energy, and time. They also generally have a compact design which allows for flexibility during installation.

What are Mechanically Cleaned Filters and How Do They Work?

Mechanically Cleaned Filters

Mechanically cleaned filters are typically stainless steel housing that contains a filter screen. The unfiltered liquid enters the filter and the solid particles within the liquid are deposited on the interior surface of the filtration screen. Once that is done, the filtered fluid exits at the outlet. When it comes time for the filter to be cleaned, there is a spring-loaded cleaning disc on the interior of the filter that moves up and down within the filter, wiping it clean in both directions.

Once it has removed all of the debris from the filter, the cleaning disc then pushes the contaminant to the bottom of the housing. As the cleaning disc is on a downward stroke, the flushing valve will open for a few seconds, flushing all the debris out of the filter. This is all done while the filter is still running, helping to maintain process efficiency. Mechanically cleaned filters eliminate the need for disposable filters and help provide a consistently low-pressure differential. All of these factors not only help keep your system running efficiently, but they lower the cost of labor and inventory.

What are Tubular Backwash Filters and How Do They Work?

Tubular Backwash Filters

Tubular backwash filters, like mechanically cleaned filters, are designed to be cleaned while the system is still running, allowing you to have a continuous operation. They work best in systems that have high flow rates with low solids loading. The solids in the media should be granular. Typically, tubular backwash filters replace bag and cartridge filters.

In tubular backwash filters the liquid enters the filter from the base of the housing and flows through the filter outside inward. With this flow path, the debris collects on the outside of the filter. When the contaminants have built up and need to be removed, pressurized fluid is run reverse through the system to clear off the contaminants. This fluid and the contaminants are then expelled through the drain at the base of the system.

There are two different types of backwash systems: external and internal. An external tubular backwash filter has an additional header at the top of the unit. When backwash is initiated, the header at the top flushes a cleaning fluid (most often water) through the system to clean the filter. An internal tubular backwash filter, on the other hand, sends a clean process liquid into the system to flush out the contaminants. When uninterrupted flow is needed, both tubular backwash systems do allow for forward flow while cleaning.

Increased Operations with Industrial Self-Cleaning Filtration Systems

If your filtration system is beginning to require more maintenance, or you’re looking to upgrade your system, consider an automatic self-cleaning filtration system. Be it a mechanically cleaned system or a tubular backwash system, a self-cleaning filtration system only brings advantages, from less time on routine maintenance to lowered operating costs, self-cleaning filters could be the solution your business is looking for.

As an industry pioneer, we provide filters for a wide variety of industrial applications. The compact design of our filters is a real space saver. We offer self-cleaning filters, backwash filters, basket filters, bag filter housings, cartridge filters and more.

YUANLV - One of the Leading Filter Housing Manufacturers, Exporters and Suppliers

We encourage you to work with YUANLV engineers to save valuable time, money and manpower for your project. We'll make sure you get the best self-cleaning filter for industrial, irrigation and municipal water filtration applications. Give us a call today at 86-311-85955658 or fill out our quote form and we will respond right away to help you find the best filter for this project.

Contact and Advice

For advice and custom bag filters or filtration solutions please contact us directly for a quote. WhatsApp/Tel: 86-18032153916, Email: admin@yuanlvfilter.com

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