Industrial Filtration - Balston | Parker
Industrial filtration protects equipment, workers, and customers from harmful contaminants, purifies air, gas, and water, and separates and isolates products. It is used in various processes, including membrane fil...
Categories from Balston (5)
FRL's
Compressed air FRLs, which encompass Filter, Regulator, and Lubricator components, are integral to pneumatic systems. These units filter, regulate air pressure, and provide lubrication to ensure clean, controlled, and well-maintained compressed air for various industrial applications. Compressed air FRLs are crucial for optimizing the performance and longevity of pneumatic equipment in settings such as manufacturing and automation.
Filter Elements
Compressed air filter elements are integral components within filtration systems, designed to remove impurities, contaminants, and particles from compressed air. These elements are crucial in ensuring that the compressed air remains clean and free from pollutants, safeguarding the integrity of pneumatic equipment and various applications. Compressed air filter elements are versatile and applicable across various industries where air quality is paramount.
Parts and Accessories
Compressed air parts and accessories encompass a wide range of components that enhance the functionality and performance of pneumatic systems. From connectors and hoses to couplers and regulators, these accessories are pivotal in optimizing the operation of compressed air systems. They are utilized across various industries and applications, ensuring the reliability and efficiency of pneumatic equipment.
Dryers
Compressed air dryers are essential components in pneumatic systems that remove moisture and humidity from compressed air. These dryers ensure that the air delivered to pneumatic tools and equipment is dry and free from water vapor, preventing damage and enhancing system efficiency. They find wide applications in various industries where compressed air quality is crucial for operational success.
Drains
Compressed air drains are essential components in air compressor systems, designed to remove condensate and moisture from the compressed air, ensuring the delivery of clean and dry air. These drains are crucial in preventing damage to pneumatic equipment and maintaining system efficiency. Compressed air drains are widely used in various applications, offering effective moisture removal and improved performance.
Filter
Filter
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The Parker Balston 12E37BX16A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 12E37BX18A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$587.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX16A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX18A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$549.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX18A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$554.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX21A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$587.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX21A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 130-14-BX is a High-Efficiency Coalescing Filter Element (130 Series). Microfibre coalescing cartridge rated at 2µm with 99.99% efficiency at 0.01 micron. Removes oil, water, and fine particulate from compressed air for instrument-quality air supply. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$447.99
Available for Purchase
Subject to factory lead times
The Parker Balston 13470 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$327.98
Available for Purchase
Subject to factory lead times
The Parker Balston 14000 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$111.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14001 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$115.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14160 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$203.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14162 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$147.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14163 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$175.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14165 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$122.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14166 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$355.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14168 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$158.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14172 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$260.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14173 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$390.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14174 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$368.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14175 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$281.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14177 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$339.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14178 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$475.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14179 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 12E37BX16A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 12E37BX18A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$587.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX16A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX18A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$549.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX18A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$554.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX21A is a Sample Filter Housing. Compact stainless steel filter housing designed to protect analytical instruments and gas analyzers from sample impurities. Removes solids and liquids from gas samples at high efficiency. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$587.97
Available for Purchase
Subject to factory lead times
The Parker Balston 12E47BX21A2 is a OEM Filter Module. Compact OEM filter module designed for integration into analytical instruments, medical equipment, and specialty gas handling systems. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
The Parker Balston 130-14-BX is a High-Efficiency Coalescing Filter Element (130 Series). Microfibre coalescing cartridge rated at 2µm with 99.99% efficiency at 0.01 micron. Removes oil, water, and fine particulate from compressed air for instrument-quality air supply. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$447.99
Available for Purchase
Subject to factory lead times
The Parker Balston 13470 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$327.98
Available for Purchase
Subject to factory lead times
The Parker Balston 14000 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$111.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14001 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$115.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14160 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$203.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14162 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$147.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14163 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$175.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14165 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$122.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14166 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$355.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14168 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$158.00
Available for Purchase
Subject to factory lead times
The Parker Balston 14172 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$260.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14173 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$390.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14174 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$368.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14175 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$281.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14177 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$339.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14178 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
$475.99
Available for Purchase
Subject to factory lead times
The Parker Balston 14179 is a Replacement Part. Factory-specified replacement part for Balston filtration systems. Using genuine Balston parts ensures continued system performance and maintains warranty coverage. Parker Balston is the recognized leader in compressed air and gas filtration technology, with products used across laboratory, pharmaceutical, semiconductor, and industrial manufacturing applications.
Requires Quote
Available for Purchase
Subject to factory lead times
FAQS
- Manufacturing plants use a variety of filtration systems depending on the media being filtered and the contaminants being removed. Liquid filtration systems — including bag filters, cartridge filters, and automatic self-cleaning strainers — remove particulates from process water, chemicals, coatings, and other fluids to protect equipment and maintain product quality. Gas filtration and separation systems remove particulates, oil aerosols, water vapor, and other contaminants from compressed air and process gas streams to protect pneumatic equipment, instrumentation, and downstream products. Strainers (Y-strainers and basket strainers) are installed in pipelines to catch large debris that could damage pumps, valves, and control equipment. Dust filtration systems — including dust collectors with cartridge or bag media — capture airborne particulates generated by grinding, sanding, cutting, conveying, and material handling operations to protect workers and meet OSHA air quality standards. Filter housings hold the filter elements and provide the pressure containment needed for the application's flow rate and operating conditions.
- Bag filters and cartridge filters are both used for liquid filtration, but they differ in design, capacity, and application fit. A bag filter is a flexible fabric or felt pouch that sits inside a filter housing — liquid flows from outside the bag through the media to the inside, trapping particles on the outer surface and within the media. Bag filters handle high flow rates, are cost-effective per unit of filtration area, and are easy to change. They are the standard choice for applications with moderate to heavy particle loads where micron ratings of 1 to 200 microns are sufficient — such as water treatment, chemical processing, paints, and food and beverage production. A cartridge filter is a rigid or semi-rigid cylindrical element (pleated, wound, or melt-blown media) that typically provides finer filtration and higher efficiency than bag filters, with ratings available down to sub-micron levels. Cartridges offer more surface area in a smaller footprint, making them ideal for applications requiring tight particle control, lower volume flows, or polishing filtration after a coarser first-stage filter.
- Filter media material selection depends on the fluid chemistry, temperature, particle characteristics, and regulatory requirements. Polypropylene is the most widely used industrial filter media — it offers broad chemical compatibility (resistant to most acids, bases, and solvents), is FDA compliant for food and beverage applications, and is cost-effective. It is available in melt-blown, spun-bonded, and pleated configurations. Polyester provides higher temperature resistance than polypropylene (up to approximately 300°F) and excellent mechanical strength, making it well suited for higher-temperature liquid applications. Nylon (polyamide) offers good chemical resistance and is commonly used in monofilament woven mesh bag filters for applications requiring precise pore-size surface filtration and bag reusability. Stainless steel mesh and sintered metal media are specified for high-temperature, high-pressure, and aggressive chemical applications where polymer media would degrade. Nomex is used in high-temperature applications such as hot oil filtration and dust collection at elevated temperatures. PTFE media provides universal chemical resistance for the most aggressive acids and solvents. Always verify the media material's compatibility with your specific fluid and operating temperature.
- A filter housing is the pressure vessel that contains the filter element (bag or cartridge) and provides the connections for inlet and outlet piping. The housing seals the process fluid inside, directs flow through the filter media, and allows operators to access the element for replacement. Choosing the right housing involves several factors: the number and size of filter elements it holds (which determines flow capacity), the pressure rating (must exceed the maximum system pressure plus a safety margin), the material of construction (carbon steel for general industrial service, stainless steel 304 or 316 for corrosive fluids, food-grade, or pharmaceutical applications), the connection type and size (NPT threaded, flanged, or sanitary tri-clamp), and the element type it accepts (standard bag sizes #1 through #4, or specific cartridge lengths of 10, 20, 30, or 40 inches). Single-bag housings are the most common for moderate flow rates, while multi-bag housings handle higher flows. Multi-cartridge housings hold several cartridges in parallel for high-volume, fine-filtration applications. Always size the housing to handle peak flow without exceeding the recommended differential pressure.
- An automatic self-cleaning filter continuously removes captured contaminants from its filter element without shutting down the flow or requiring manual intervention. When the differential pressure across the element reaches a setpoint (indicating the element is loaded with contaminants), the system automatically initiates a backwash, scraper, or suction-scanning cycle that cleans the element and discharges the collected debris to drain. The filtered process flow continues uninterrupted during cleaning. Automatic self-cleaning filters are the right choice when the contaminant load is heavy and continuous — meaning manual filter bag or cartridge changes would be required so frequently that labor cost, downtime, and waste disposal become impractical. Common applications include cooling water systems, river or well water intake protection, wastewater reuse, industrial process water loops, and any high-volume, continuous-flow application where filter element changes multiple times per day would be operationally burdensome. The higher upfront cost of an automatic filter is offset by dramatically reduced labor, filter media consumption, and downtime compared to manually changed bag or cartridge systems in heavy-duty service.