Technical Features That Help Deciding the Pocket Filters Quality

The pocket filters are gaining popularity these days due to their high filtration efficiency and significance. Due to their distinctive characteristics, these are heavily being used for a lot of industrial applications. The pocket filters, come in full or half size, are deep bed style bag filters that are mounted to an inner basket assembly and a metal outer frame. In this article, we will discuss some of the key qualities of the best pocket filters.

Surface Area

The pocket air filters have more surface area and dust capturing capacity than flat panel type air filters. The higher the number of pockets, the more the surface area it can have. Eventually, the higher surface area enhances the air filtration ability of the pocket filter and reduces the energy usage.

The Quality of Filter Media

The synthetic filter media better resists moisture accumulation and is good for avoiding the growth of mold and mildew. The pocket air filters also sustain the high-efficiency performance with a comparatively low-pressure drop, in order to deliver an effective air filtration. The usage of premium-quality filter media ensures the best performance.

Quality of the Cardboard Frame

Sturdy, durable cardboard frame bear the force of the incoming air stream and support the filter media. The beverage board grade cardboards are resistant to water infiltration that may cause structural damage. A strong housing module leads to a longer service life. The poor design collapses prematurely, causing many issues for the downstream equipment.

Quality of the Media Bonding

The pocket filters should be tightly and safely bonded to a cardboard frame so as to avoid air bypass, where the pollutants can escape through the little gaps on the filters’ sides.

These design considerations help users achieve an optimal airflow static as well as the load capacity that enhances energy efficiency.

a cardboard frame so as to avoid air bypass, where the pollutants can escape through the little gaps on the filters’ sides.

These design considerations help users achieve an optimal airflow static as well as the load capacity that enhances energy efficiency.

Commercial Air Filters Have Become Mandatory for Hospitals

Airborne transmission is an obvious route for various diseases like aspergillosis and tuberculosis and is connected to the outbreaks of MRSA. Commercial air filters for hospitals are must-to-have devices in every hospital, clinical and scientific settings as these are sensitive environments and must be controlled with an extra care. Ensuring clean and healthy air to such sensitive areas via existing ventilation systems is not an easy task. However, the commercial air filters specifically developed for hospitals are an ideal solution, which are used in high-performance mobile hospitals air filtration systems as well.

Research studies show that commercial air filters used in hospital air filtration systems can decrease the rate of diseases by more than 50%. Effective airborne infection control via hospital air filters not just saves lives but also greatly reduces the cost of the patient care. The commercial air filters used for hospitals have the potential to fight hospital invasive infections and result in substantial cost savings.

The stand-alone, moveable hospital commercial air filtration units are developed to be installed in a typical healthcare setting, irrespective of the hospital’s heating and ventilation system. Easily fixed at the site of each contamination, the commercial air filtration systems exhibit almost silent operations, which makes the range of these filters especially suitable for the patients’ rooms.

All commercial air filters for hospitals are developed to fight against contaminants present in the healthcare settings. The units hold a broad range of qualities that have been integrated to meet high level of expectation of convenience, performance and reliability.

To ensure that commercial air filters for hospitals are up to expectations, these are individually tested, then guaranteed and certified also, to ensure the filtration efficiency of over 99% on all particles at 0.3 microns, in most of the cases.

Bag Filter is Available in Various Materials – Which One is for You?

Fabric filter bags are usually round tubes, made of woven fabric or nonwoven fabric. Each fabric material used in bag filters has its own characteristics and use. This article highlights the fabric types used in bag filters that are used in a range of applications.


These synthetic fibers provide good hydrolytic resistance for a limited temperature range, 127°C for continuous and 135°C for rush application. Acrylic fibers are also used in the production of ferrous and nonferrous metals, cement, carbon black, lime, and fertilizers. They are also used widely in wet filtration applications.


The primary advantage of polypropylene is that it is non-hygroscopic (it is unable to chemically react with water). It shows great resistance to the static abrasion and build-up and offers a slick surface for sufficient dust cake release during bag cleaning. Polypropylene is extensively used in the food, chemical processing, detergent, pharmaceutical, as well as tobacco industries. However, copper, oxidizing agents, and related salts may damage polypropylene.


Polyesters are one of the most extensively used fabrics for all-purpose applications. The main damaging agents are water (hydrolysis) and rigorous sulfuric, nitric, and carbolic acids.


Most of the fiberglass fabrics are woven from filaments. Numerous variations of yarn construction, fabric finishes, and fabric weaves are available. It is also manufactured in a felted form. Fiberglass bears the highest operating temperature range found in conventional fabrics. Above 260°C, the fiberglass itself is not damaged, but the finish offering yarn-to-yarn lubrication starts vaporizing, leading to accelerated mechanical wear of the glass fibers. Fiberglass is noncombustible, offers zero moisture absorption (cannot hydrolyze), possesses excellent dimensional stability, and has practically good strength features. Woven glass fabrics hold high tensile strength qualities but moderately low flex strength, particularly in the fill (circumference) direction of the bag, and low abrasion resistance.

HVAC Filters for Global Industries

The HVAC air filtration technologies, particularly the HVAC filters, have evolved with time, raising the bar of quality and efficiency that can be expected from the HVAC filters. The HVAC filter manufacturers are thus moving ahead to deliver their clients the best innovations in terms of high-quality and multi-functional HVAC filters. Nowadays, the HVAC filters are becoming more eco-friendly and cost-efficient. However, selecting an option is all based on the user’s preference, nature of operation and available budget.

No matter what HVAC filter it is, to choose the right one, you need to have some information about the kinds of HVAC filters available in the market. Following are some of the mainstream air filter types that are best known for providing the optimal quality in most of the instances.

The custom OEM HVAC filters are developed to offer optimal performance. These air filters can easily be customized to meet exact requirements of the operation and the equipment, to ensure high operational efficiency. These HVAC filters are also integrated with the existing systems and their functioning is matched with any kind of application that the client requires. The customization can be made in terms of changes in the density, the kinds of media used in the filter production and the number of filter layers.

It should be remembered that OEM parts of the HVAC filters can be costlier than other air filter alternatives. This option, though, generally comes with higher quality since it has been designed as per the equipment design as well as optimal performance requirement in a specific application. Their purchase makes sense in a long run since it delivers a higher ROI.  In addition, there are the clients who look for eco-friendly solutions. The green HVAC filters are the latest advancement that we are going to see soon across the industries as well as homes.

Industrial Air Filters – The Carbon Context

Carbon industrial air filter is used in carbon filtering where the system uses a piece of the activated carbon to eliminate impurities and contaminants, using chemical adsorption. When the material soaks something, it bids it to via chemical attraction. The big surface area of the activated charcoal enables many bonding sites to form.  This carbon is usually activated with the positive charge and is developed to attract the negatively charged water contaminants. The article presents how the filter media of the carbon industrial air filters, i.e. the activated charcoal, impacts the performance of the carbon industrial air filter.

The activated carbon absorbs through its surface. When no more surface is left to further absorb to the carbon, it capacity is reduced. Huge amount of carbon lasts longer than smaller amount since it possesses a higher surface area for the adsorption. In addition, based on the pollutant percentage being adsorbed, a little amount of the carbon can be consumed within a few weeks, which makes it useless.

The more the contact time of carbon is with the pollutant, the better adsorption it exhibits. The thicker the carbon filter, the higher the adsorption rate is. If the pollutant goes through a long maze of the activated carbon, there are higher chances for it to be adsorbed. It implies that thin carbon filters fitted in the inexpensive air purifiers may not be effective as required, at removing fumes, chemicals, and odors from the air.

The coconut shell carbon offers more hardness, which makes it cleaner than most of the other carbons and more long lasting. This, along with higher activity level, makes them highly suitable for all kinds of carbon filter. Apart from the general level of air purification and deodorization, the coconut shell carbons also show a superior performance in solvent recovery applications as well as in many industrial settings.

How to Select the Best Working Turbine Filters for your Application?

As we know that turbine filters are critical components of several industrial applications and processes, there is still many discrepancies regarding the purchasing and performance criteria. Maybe the most common and the initially evaluated criteria is the turbine filters’ filtration efficiency. However, it’s also important to emphasize on what is truly and equally important and that includes the turbine filters’ compressors and the performance of the gas turbine itself.

This article highlights that why it is important to evaluate other factors while choosing the filter for the air inlet system. The filtration efficiencies measure the amount of dust and other contaminants the turbine filters remove during a particular test and is developed to mention the estimate of the filter effectiveness and lifespan. That may, though, devaluate the effects of other factors of the turbine filters that are also the part of your plant. Let’s see these factors briefly.

  • The Inlet House

It implies the quantity of air and the moisture the filter can pass through. Based on how big your inlet is, you may be required to examine how the airflow is to be treated along with what filters you are choosing. It is possible to enhance the compressor performance by installing different safeguards like mist eliminators, weather hoods, moisture separators and coalesces, which decreases the amount of polluted air and moisture and helps filtration. Since these are various stages in the inlet house, they would not be accounted for any stand-alone filtration efficiency test.

  • Material used for Filter Casing

Plastics or metals are used for the filter casing. The question of concern is that is there an advantage from stainless steel versus the galvanized steel and do some kinds of plastics hold up there? Metals have the tendency to be corroded from the surrounding sites that can impact turbine filters’ performance.

The Functioning of the HEPA Filter

HEPA is the short form of High Efficiency Particulate Air, hence HEPA filter refers to the High Efficiency Particulate Air filter. Filters, used either for an air purifier or any other implementation, are developed with a range of benefits. This article focuses the HEPA filters, what they are and how they work, to throw some light on its ecosystem.

What makes HEPA filters different from the rest is that they are more than just filters. This is because to be a true HEPA filter, it must first clear the test to be approved. The Institute of Environmental Sciences and Technology says that the HEPA filter must capture 99.97% of particulates 0.3 microns or bigger. This does not imply that the filter is unable to capture particles that are smaller than 0.3 microns, as many HEPA filters can; it is only the threshold that must be reached to qualify for HEPA name.

The HEPA Filtration Processes

In simple words, the HEPA filters capture air contaminants in a wide web of fibers. Based on the size of the particle, this can occur in four diverse ways:

  • Inertial Impaction
  • Diffusion
  • Interception
  • Sieving

Bigger particles are trapped through inertial impaction as well as sieving. The particles either hit with the fibers and get captured or are trapped while trying to travel through the fibers. Medium sized contaminants when flow through the filter, are trapped by the fibers through interception. Smaller particles are dissolute as they travel through a filter and finally collide with a fiber and then trapped.

Not All Filters are HEPA Filters

As perceived mistakenly, not all HEPA filters are the same. There are differences in terms of their composition as well as utilization.  The air first flows through an ionizer that charges the incoming particles with a negative electrostatic charge.

Why Do Gas Turbine Filters Bear Significance for Industries?

Proper air filtration is critically important to the overall reliability and working of gas turbine filters. Fuel costs make around 80 percent of the total life cycle cost of electricity. Small gains in efficiency also mean huge savings. With fuel costs of almost $16.00/mmBTU and higher in some global regions, the operational savings may be achieved via better compressor performance and using High Efficiency (HEPA) air filters. Operators can greatly reduce their maintenance costs because of a much cleaner engine, quantified by minimal number of inspections, fewer shutdowns, as well as higher availability. Gas turbines can maintain optimum GT efficiency across the entire life of the filter. This article highlights he decision criteria that is valuable in choosing the optimum gas turbine filter solution, with an objective of maximizing gas turbine availability and reducing the operating costs.

The aero derivative gas turbine ventilation and combustion air filter systems are developed to guard the gas turbine, equipment compartments and generators from the impacts of contamination, air-borne dirt, and foreign objects. Various inlet conditioning options are also there to maximize the gas turbine filter performance.

Most of the advanced gas turbines available nowadays use a three-section inlet air filter that is mounted directly over the turbine enclosure, conserving the space and offering compact, low-pressure loss ducting in the turbine inlet.

The ventilation and combustion air filter system are made up of a filter house structure, fans, roof-mounted silencers, and related ductwork all placed on the turbine and generator enclosures. The filter house is made up of weather hoods, chiller, filter elements, or anti-icing coils, and plenum chamber assembly. Air from a plenum assembly is ducted into the turbine engine intake for the combustion and to the generator and turbine compartments for ventilation and cooling. An external walkway and ladder with the access doors to the air filter structure are there that facilitate filter servicing.

Al About V-Bank Filter & its Filtration Mechanism

V bank filtration is the kind of filtration that functions by flowing water to be purified or utilizable for use as a drinking water through the banks of the lake or a river. It is then pulled in by extracting the wells few miles’ distance away from the water source. The process might directly produce drinking water, or might be a comparatively uncomplicated means of pre-treating water for more purification.

The V bank filters are highly demanded in commercial and industrial processes along with the domestic or household applications. Three major filtration processes are possible. Physical straining or filtration occurs when the suspended particulates are very big to transmit through the interstitial places between the alluvial soils particles. Biological filtration happens when soil microorganisms eliminate and digest suspended or dissolved organic chemicals and stuff nutrients. Ion exchange or chemical filtration might happen when aquifer soils react with the soluble chemicals in the water.

Most of the normal contaminants including the organic and inorganic pollutants and microbial organisms would be eliminated by the bank filtration, either due to the fact that they are filtered out by the earth or sand of the bank, or due to the fact the passage time is enough to render them in an inactive state. Research has also revealed that removal of the efficiency is based not just on the contaminant but also on the chemical and hydraulic traits of the bottom sediments and an aquifer, the local recharge discharge situations and the biochemical procedures.

With V bank filtration the process is implemented for carrying out water purification and refining so as to use the water in carrying out various industrial processes and commercial applications. V bank filters are heavily being utilized by the industries like chemical, construction, pharmaceutical, petroleum and so on. Apart from that, domestically also it is also installed in homes and small scale workplaces.

HVAC Filters Are Intensively Tested & For Good Reasons

HVAC filters are tested by third parties; no manufacturer can test their own filters. In the United States, there are specific labs to send HVAC filters to that are government regulated, and they have to test the filters under “ash-ray” standards. These standards are constantly being worked on based on the medias that are available. The HVAC filters themselves are regulated and tested, not the manufacturer. As you’re manufacturing, they’re “ash-ray” tested. For HVAC-grade filters, they have to be tested through “ash-ray” standards in addition to a DOP test. It’s the third-party that is regulated by “ash-ray” standard, not the manufacturer.

All HVAC filters are individually certified as to conformance with their target efficiency. The data from the testing is provided on a label on every filter stating test airflow, resistance to airflow and penetration (the inverse of efficiency). Originally HVAC filters were tested using dioctylphthalate, a known carcinogen, as prescribed in the original military testing standard authored to address HVAC filter performance. Today, manufacturers test each HVAC filter according to methodologies as outlined in Recommended Practices (RP) as published by the Institute of Environmental Sciences and Technologies (IEST).

Filters are challenged with particles of specific size and the penetration of each filter is so recorded. The minimum level of HVAC filter performance is an efficiency of 99.97% when tested on particles 0.3 micron in size. As technology has advanced, and the need of ultra-clean air in industries such as microelectronics and pharmaceutical has evolved, filters have become available that can provide a performance of 99.999995% efficiency on particles 0.12 micron is size. Because a HVAC manufacturer cannot be responsible for transportation of the filters to the user or handling and installation, many applications require additional in-place testing to ensure the installed integrity of the HVAC filter.