Filtration Media Specifications

Performance Specifications


	Filtration Grade (Micron Rating):		Filtration grade (micron rating, Beta ratio) describes the ability of a fluid filter to remove contaminants by particle size. Machinery manufacturers may accept the Beta ratio, but refrain from using this information to identify or specify their filters. Unlike fluid filters, air filters are not rated by micron size.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Maximum Liquid Flow		This is the maximum liquid flow for which the filter is designed.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Maximum Pressure		This is the maximum pressure at which the filter is designed to operate.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Performance Range
	Your choices are...
	Micro Filtration		Micro filtration can remove particles as small as 0.1 – 10 µm.
	Ultra Filtration		Ultra filtration membranes can remove particles as small as 0.001 to 0.1 µm.
	Nano Filtration		Nano filtration is a pressure-related process, which separates molecules based on size. It is used mainly in water purification processes such as water softening, de-coloring, and micro-pollutant removal. Nano filtration is also used to remove specific components such as coloring agents.
	Reverse Osmosis		Reverse osmosis is a membrane-separation process that uses synthetic membranes to extract purified water from wastewater. These synthetic membranes are permeable to water molecules, but relatively non-permeable to contaminants.
	Other		Other unlisted or specialized filter types.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	FDA Compliant		Filter meets Food and Drug Administration requirements.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Industry / Market


	Industry / Market:
	Your choices are...
	Aerospace / Defense		Products are designed to filter fluids used in the manufacture of aerospace or defense systems.
	Biopharmaceutical		Products are designed for use in drug discovery, pre-clinical and clinical trials, and full-scale production of pharmaceutical products.
	Electronics		Products are designed for electronics applications.
	Engine / Transmission		Products are designed for use on or within engines or transmissions.
	Food and Beverage		Products are designed and rated for use with food or beverage processing applications, specifically in the food, dairy, and brewing industries.
	Hydrocarbon Processing		Products are designed for refining and gas processing applications.
	Medical		Products are designed for medical applications.
	Municipal Water Supply		Products are designed for use in municipal water systems.
	Pool and Spa		Products are designed for use with pools and/or spas.
	Power Generation		Products are designed for use in power generation plants to improve efficiency and fluid life.
	Pulp and Paper		Products are designed for use in paper and pulp processing plants.
	Semiconductor Processing		Products are rated for use in the manufacturing of semiconductors. High-purity process fluids, gases, and water used in the semiconductor manufacturing process require the highest quality filters to increase production yields, to remove particulate and other impurities, and to increase the life of the fluids used.
	Waste Treatment		Products are designed for the filtration of wastewater.
	Other		Other unlisted or special applications.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Materials of Construction


	Filter Media Material:
	Your choices are...
	Activated Carbon		Activated carbons are made of a variety of materials, the most common of which are bituminous coal and lignite. They have specific properties that are a function of the material source and the mode of activation. Property standards are also useful in specifying activated carbon for a specific application. Granular carbons from bituminous coal and lignite are used mainly in wastewater treatment applications. Granulated, activated carbon can also be produced by roasting organic material.
	Activated Clay		Activated clay is used to remove dissolved contaminants such as acids, oxidation by-products, colors, and surfactants.
	Diatomaceous Earth (DE)		Diatomaceous earth (DE) is a naturally-occurring mineral derived from the microscopic, fossilized remains of marine diatoms. DE has high absorption, low bulk density, and high brightness.
	Cellulose		Cellulose is made from plant fibers. Because it is a natural material, its fibers are rough in texture and varied in both size and shape. These characteristics create a higher restriction to the flow of fluids compared to synthetic media. Cellulose types include cellulose acetate, nitrocellulose or cellulose nitrate, and regenerated cellulose.
	Ceramic		Ceramic materials are made of nonmetallic minerals (such as clay) that have been permanently hardened by firing at high temperatures. Most ceramics resist both heat and chemicals.
	Cotton		Cotton is a highly-efficient filtration media because its fibers are irregularly shaped and have good absorption properties. Cotton filters are often a good choice because they provide increased tenacity under wet conditions.
	Glass Fiber		Glass fibers are completely-incombustible inorganic fibers. They have a high tensile strength in relation to their weight and dimensional stability. Glass fibers do not stretch or shrink. They do not absorb water and resist mildew, deterioration, and decay.
	Ion Exchange Resin		Ion exchange is a process that involves two similar applications of one technology. The first application is water softening, a process that removes ions from water and replaces them with sodium ions and chloride ions. The second application is deionization, a process that removes ions from water and replaces them with H⁺ and OH^- ions which can combine to form water. Ion exchange filters are used in residential applications to reduce hardness or improve the taste of water. They are also used to reduce deposits and scale from water with a high level of hardness. Deionization is often used when extremely pure water is required.
	Metal / Porous Metal		Metal or porous metal filters have a large surface area to trap condensable particles and oil vapor. Products are often corrosion resistant.
	Mineral / Sand		Sand filtration is often used to eliminate suspended solids from liquids. Though relatively inexpensive, the filtration media must be changed often.
	Nylon		Nylon is a commonly-used, general-purpose material that comprises several grades of polyamides. Nylon is tough, resistant, and has good pressure ratings. Nylon membranes are compatible with most solvents, both organic and aqueous. Use with strong acids, 70% ethanol, methylene chloride, or dimethylformamide (DMF) is not recommended.
	Paper		Porous paper can be used specifically for filtering.
	Polyethersulfone (PES)		Polyethersulfones (PES) are high-performance polymers that are similar to polycarbonates, but much more heat-resistant. Because PES resists water and steam, it is used to make products that must be sterilized between uses (e.g., cookware, medical instruments).
	Polyester / Fiberglass		Polyester is a manufactured product whose fibers are long-chain, synthetic polymers which, by at least 85% per weight, are composed of an ester of a substituted aromatic carboxylic acid, including but not restricted to substituted terephthalic units.
	Polypropylene (PP)		Polypropylene (PP) is a thermoplastic material which exhibits excellent cold flow, bi-axial strength, and yield elongation properties. PP is similar to PVC, but can be used in exposed applications because it resists UV, weathering, and ozone.
	PTFE / Teflon®		PTFE is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials, such as Teflon^® (DuPont Dow Elastomers).
	Polyvinylidene Fluoride (PVDF)		Polyvinylidene fluoride (PVDF) is a melt-processable fluoropolymer that provides better strength and lower creep than other fluoropolymers. PVDF has good wear resistance and excellent chemical resistance, but does not perform well at elevated temperatures. Common brand names include Kynar^® (Elf AtoChem).
	Polyvinylidene Chloride (PVDC)		Polyvinylidene chloride (PVDC) can be made directly from ethylene and chlorine or by the further chlorination of vinyl chloride with the subsequent removal of hydrogen chloride by alkali treatment. Vinylidene chloride is polymerized in suspension or emulsion processes, using free-radical initiators. Because of its low permeability to water vapor and gases, PVDC is ideal for food packaging. Copolymers of vinylidene chloride and other monomers are also marketed.
	Polysulfone (PSU)		Polysulfone (PSU) is a thermoplastic polycondensate used in electric connectors. It has high strength, good toughness, good dielectric strength, and dimensional stability. PSU is sold under the trade name Ultrason^® (BASF Aktiengesellschaft).
	Synthetic Fiber		The filter medium material is synthetic fiber.
	Other		Other unlisted or proprietary materials.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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