Roger Morph 
Maintaining the highest quality of water purity is essential in industrial production processes. Without proper filtration, you risk compromising product quality and safety. This can pose health risks to consumers and costly setbacks to your organization. Fortunately, cartridge filters offer an effective solution to this challenge.
This guide covers everything you need to know about cartridge filters — types, components, and maintenance tips for optimal performance.
What Is a Cartridge Filter?
A cartridge filter is a cylindrical device that efficiently removes contaminants from liquids or gasses. These often include chemicals and particles — such as submicron particulates. Cartridge filters are widely used in water treatment, pharmaceuticals, food and beverage, and chemical processing industries. They come in different sizes, shapes, and materials and are easy to install and maintain.
What Are the Two Categories of Cartridge Filters?
Water filter cartridges come in two main categories:
a) Surface filters and
b) Depth filters.
These filters consist of a tubular or pleated device housed within a casing.
Surface Filters
Surface filters catch contaminants on the surface of the filtration media. The cartridge filtration media prevents particles from getting through, acting as a barrier. Fluid flows through a thin material layer that blocks particles according to size.
Key features include:
- Filtration Mechanism: They capture contaminants on the surface of the media.
- Particle Size: The particles retained are larger than the pore size of the media.
- Cost and Longevity: They are generally less expensive but have a shorter lifespan than depth purifiers.
Examples include pleated and cellulose cartridges.
Depth Filters
These trap contaminants within the thickness of the filtration media, which consists of multiple layers. The filtration media creates a tortuous path that captures particles throughout the depth of the material.
Key features include:
- Filtration Mechanism: They capture contaminants throughout the entire depth of the media.
- Particle Size: These water cleansers can trap much smaller particles — including submicron particulates
- Cost and Longevity: They are more expensive and last longer.
Examples include string-wound, ceramic, and sintered cartridges.
What are the Basic Components of Filter Cartridges?
Filtering cartridges typically consist of several basic components, including:
- Filter Media: This is the heart of the filtration process. It is made from various materials, including paper, polyester, polypropylene, and activated carbon. Each material has unique properties suited to different filtration needs.
- Core: The core is the cleanser’s central support structure. It prevents the filtration media from collapsing under pressure. Cores can be made from polypropylene or stainless steel, depending on the application requirements.
- Support Cage: This is made from metal or plastic and provides additional structural integrity to the filtration media. The support cage helps to maintain the shape of the filter during operation, especially under high pressure.
- End Caps: These secure the filtration media and provide a seal between the cartridge and the housing. They ensure that untreated fluid does not bypass the filtration media.
- Gaskets and O-rings: These components create a seal between the cartridge and its housing. Their role is to prevent leaks and ensure all fluid passes through the filtration media.
How to Clean Industrial Filter cartridges
Regular maintenance is vital to ensuring the purifier continues to perform at optimum capacity and lasts. The specific cleaning method is determined by the contaminants and the purifier’s design.
For surface types, regular cleaning involves removing accumulated particles from the surface, either through backwashing or chemical cleaning. Depth water cleaners may require more thorough cleaning, such as soaking in cleaning solutions or using compressed air for backflushing.
After cleaning, ensure proper drying and reassembly to prevent microbial growth or damage. Regular maintenance schedules and monitoring help ensure consistent performance and minimize downtime.
How to Replace a Cartridge Filter
Filter cartridges need prompt changing when dirty or reach a pre-set differential pressure. Here’s a summarized guide on replacing your cartridges safely and effectively!
- Shut down and de-pressurize the system.
- Open the air vent valve to release any remaining pressure and drain excess fluid.
- Thoroughly clean the drain valve.
- Carefully remove the housing lid.
- Unscrew the wing nuts and take off the alignment plate.
- Remove the springs from the device.
- Gently extract the cartridges.
- Inspect the housing for any signs of corrosion or dirt buildup.
- Install the new cartridges, ensuring proper alignment using the alignment plate.
- Securely reattach the springs, alignment plate, and wing nuts.
- Double-check all fittings to ensure they are correctly installed.
- Clean and apply lubricant to the O-ring.
- Tighten the housing lid securely.
- Close the drain valve and purge any remaining air from the system.
- Finally, close the air vent valve to complete the process.
When to Replace a Filter Cartridge?
It’s important to understand not just “what a cartridge filter is and how it works” but also when to replace it to maintain efficient filtration.
While typical guidelines recommend replacing every 30 or 45 days, the actual frequency depends on different actors. A clear sign that it’s time for a replacement is when the pressure difference across the filters hits about 10 psi. This indicates clogging and reduced effectiveness in screening out contaminants.
Conclusion
Cartridge filters are essential for maintaining water purity and product quality across industries. Whether surface or depth cartridge-type filters, they efficiently trap contaminants, ensuring safe production processes. However, proper maintenance and timely replacements are equally important for consistent filtration performance and cost-effective operations. For quality cartridges, contact a reputable dealer like Filterway today.
