Category Archives: Bag Filters

Improve Purity and Reduce Operating Costs with our Bag and Cartridge Filters

Companies looking to improve their purification processes and who wish to reduce operating costs can utilize advanced technology through Filtra-Systems’ bag and cartridge filters. Our bag and cartridge filters are effective and uniquely formulated to help companies meet their operational needs. These filters can be implemented in a variety of ways depending on the needs of your business. This article reviews what you need to know about our bag and cartridge filters.

Companies Can Save with a Wide Range of Filter Options

Filtra-Systems offers a unique range of filters: there are single, multiple, duplex bag filter housings, as well as filter bags for various end-user applications. Cartridge filter housings and replacement cartridges are also available, and they are popular products that offer lasting results. Cartridge filters developed by Filtra-Systems process between 1 and 1200 gpm, and larger units can be built to order. Cartridge filters can be conveniently disposed of by throwing away (depending on the material they are removing).

Filtra-Systems offers an assortment of filter bags with our advanced technology, including nylon monofilament mesh, activated carbon, and polyester (needle felt) bag filters. There are also uniquely designed filter bags for oil absorption and removal. These filters trap and remove elements such as acid, waste, and other hazardous materials, and our filter bags are highly efficient, so they last. Fiber migration and material bypass are minimized.

Our Bag Filter Housings are Engineered for Multiple Industrial Filtration Applications

Filtra-Systems engineers a line of products that includes filter housings for different applications. Carbon steel, 304 stainless steel, and 316 stainless steel housings are all kept in stock. With over 30 years of experience, we can meet the unique needs of customers for applications such as brewing, biodiesel production, coolant filtration, and more. Our housing equipment is designed to have several applications. Some housing units hold one filter while others can hold a few. Housings equipment options are suitable for applications with high pressure, high flow rates and those simply with higher demands. Dual and individual operation options are also available.

Cartridge filter housings are an additional option. Cartridge filter housings are commonly used in industries relating to food & beverage production and cosmetic industries, to name a few. These options offer quality filtration needs while meeting industrial and environmental standards. Our purification options allow customers to stay in control of operating costs while maintaining energy efficiency. To speak with Filtra-Systems about your filtration needs, contact us today, and stay tuned to our blog for more on saving money with our customized filtration solutions.

The Importance of Measuring Pressure Drop

One of Filtra-Systems’ objectives is to help other companies improve their operational processes by efficiently filtering industrial water. Two solutions we offer our customers, bag filters and cartridge filters, are used in a wide range of industrial processes by companies in varying industries. Even though these filtering solutions are ubiquitous throughout industry, too many organizations neglect or improperly maintain them.

The Negative Effects of Poor Maintenance

Poor maintenance of filtering systems has a measurable adverse effect on business. One of the most overlooked aspects of proper upkeep is tracking the pressure drop across the filter housing. Both bag and cartridge filters are usually sized so that the pressure drop with clean elements is less than 1 psi. As the filter media collects dirt, sediment, and other contaminants, the pores in the media become clogged. The initial result of this is a less efficient system due to the clogged media’s restricted flow and increased pressure drop across the media. The differential pressure increases as more and more material is collected.

If left unchecked, the elements have the potential to rip, leading to a failure in filtering incoming fluid. Not only will no filtration occur, but previously captured contaminants will also be released. The failure of an operation’s filtration system can cause the entire operation to come to a halt, something every business wants to aviod. This can of course lead to missed deadlines and disappointed customers. Such negative effects are entirely avoidable if the proper measurement of pressure drop is observed.

How to Measure Pressure Drop

To prevent bags and cartridges from failing, the differential pressure across the filters should be tracked. This can be done by either using two pressure gauges (one upstream of media, one downstream), or a single differential pressure gauge. A typical bag will need to be replaced when the pressure drop reaches 10-12 psi, and most cartridges need to be changed when the pressure drop reaches 15-35 psi. Following these simple rules ensures that both bag and cartridge filters will continue to operate correctly.

Types of Industrial Water Treatment Equipment

Industrial water treatment equipment comes in a variety of implementations, all designed to suit particular operating needs. Filter presses, bed filters, cartridge filters and bag filters all excel in their intended applications. We’ll look at each type of filter and examine what applications it is most appropriate for below.

Filter Presses

Where most industrial water treatment equipment is designed to remove solid material from water, filter presses are designed to remove water from the solids. Filter presses are ideal for any filtration application where enough material needs to be removed so that more conventional filtration methods would be ineffective. A filter press operates, as the name implies, by exerting physical pressure usually in the form of either air or a water-filled diaphragm on a slurry mixture and extracting the moisture. The remaining cake of material is then disposed of.

Bed Filters

Bed Filters are filters with a bed of material (typically crushed walnut shell, sand, anthracite or activated carbon) that removes contaminants. Material is collected throughout the depth of the bed, allowing large amounts of material to be collected before a backwash cycle is initiated. Inlet water pumps through the filtration medium, which collects and suspends contaminants. Once the medium is saturated with contaminants, a backwash cycle is initiated. The filtration medium is fluidized and washed. This industrial water filtration method cleans the medium and readies the filter for use. This reuse of the filtration medium minimizes waste associated with the process.

Cartridge Filters

Cartridge filters are disposable, replaceable, self-contained filtration units. They consist of a central perforated core wrapped in layers of filtration material. Inlet water is pumped in through the top of the filter core, and passes through the walls of the filter. Contaminants can be caught throught the depth of the filter cartrige, which allows individual cartridges to achieve very high filtration efficiencies. Cartridge filters are typically used where high purity water is required.

Bag Filters

Bag filters are similar to cartridge filters in that they are also disposable and replaceable. Bag filters are shaped like a large sock, and are sometimes called sock filters or filter pots. They catch contaminants on the surface of the bag, and are typically used as a low cost option to remove particulate from wastewater streams.

Industrial Wastewater Treatment Solutions For Your Company

Selecting the right water treatment solutions for your particular needs is sometimes a difficult process.  There are a lot of contributing factors to consider: the rate of filtration, the size of expected contaminants, the harshness of the expected operating environment, and even the intended use of the filtered water.  Fortunately, there are many industrial water solutions available and, with some consideration, the best water filtration equipment for the job can be determined.

Intended Use

One of the most important factors in selecting the right water treatment solution is its intended use.  For some applications, the clean water itself is the desired product of the process.  For others, the material that is filtered is the primary concern.

If the water itself is the focus of the filtration, there are many solutions that may be appropriate.  Factors such as flow rate and minimum contaminant size become more important.  If the water you are filtering contains oil-based contaminants, walnut shell media would be a good choice.  If the water is intended for drinking, there are a number of bag filters with an activated carbon layer that would remove any unwanted tastes and smells.

Flow Rate

Desired flow rate is a signficant point to consider when selecting water filtration equipment.  Cartridge filters, bag filters, deep bed filters, and filter presses are all sized differently, and the liquid flow rate can have a large effect on the size of the filter.  It is important to have a general notion of how much fluid you will need to pass through your industrial water filter to meet your production needs.

Operating Conditions

It’s also necessary to consider the conditions under which your industrial water treatment system will operate.  Bag filters, for instance, are an excellent disposable filter medium, yet many are not rated for high-temperature applications.  The corrosivity and other chemical properties of the inlet water (eg acidity) will also determine what materials need to be used for both the filter medium and filter housing.

There is a wide range of water treatment solutions available, and we can help you find the right fit for your particular need.  Get in contact with one of our filtration experts and we can help find the right solution for you.

Bag Filter Magnetic Inserts

The buildup of ferrous material poses a serious risk to not only coolant filtration systems, but to the quality of products produced by a manufacturer.  This unwanted material can damage cutting tools and compromise the quality of finished parts.  Many companies in a variety of industries turn to bag filter systems to help eliminate this material from their operations.  While bag filters are a great first step in combatting this problem, magnetic inserts offer significant benefits to companies that use bag filters in their factories.

Magnetic Inserts & Improved Performance

Magnetic inserts can improve the lifespan and effectiveness of bag filters.  A typical bag filter system would use just the bags to remove material from the coolant.  Unfortunately, bags have a limit to the size of particles they can remove (bags that are sized too tightly will remove important coolant additives in addition to waste).  On the other hand, magnetic bars do not suffer from this deficiency.  These bars are able to remove magnetic particles that would otherwise pass through the pores of bags.  To remove even the smallest particles, flow should be limited so that the fluid has the greatest possible contact time with the magnets.  To maximize fluid contact time, the system should always operate with a laminar flow.

Less Maintenance & Longer Lifespan

Bag filter systems that do not take advantage of magnetic bars solely rely on the bag to filter out ferrous material.  Naturally, bags that have reached the end of their useful life have to be replaced by plant personnel to complete the changeover.  Magnetic inserts increase the longevity of the bags by removing particulate before it even contacts the bag.  As a result, bags last longer, which directly translates to fewer man-hours that will be spent changing bags.

Cleaning the magnets is itself simple as well.  When bags eventually plug, simply removing the magnet from its frame and wiping it off is all that’s needed to properly maintain them.  Our magnets have a useful life that is practically endless, meaning that they do not need to be replaced over the life of the product.