SUEZ Water - Water Technologies & Water

Memtrex Absolute Pleated Cartridge Filters

the absolute rated membrane cartridge filter

The Memtrex absolute pleated cartridge filter family features a membrane as filtration media. The Memtrex family covers a wide range of applications thanks to multiple hydrophilic and hydrophobic media such as polyethersulfone (PES), nylon 66, polypropylene (PP), polytetrafluoroethylene (PTFE), and polycarbonate track-etched (PCTE). All filters in the Memtrex product family feature absolute micron ratings for the ultimate in product safety and purity. For assured quality and performance, the subassemblies used to construct the filters are individually integrity tested. Memtrex filters manufactured under a quality management system that has been certified to meet ISO 9001 standards. Each filter is assigned a lot code to ensure traceability of the data and materials used in the manufacturing process. 

Overview

hydrophobic "adverse to water" filters 

typically used for vent filtration or harsh chemical environments

Memtrex FE

Memtrex FE absolute pleated cartridge filters, with absolute rated polytetrafluoroethylene (PTFE) membranes, offer broad chemical compatibility with minimal extractables in a wide range of fluids and applications. The inherently hydrophobic PTFE membrane is ideally suited for the filtration of compressed air and other process gases. Constructed in a clean-room environment using thermal welding techniques, Memtrex FE Filters do not contain any adhesives or additives. For assured quality and performance, the subassemblies used to construct the Memtrex filters are individually integrity tested. 

  • Highly resistant to aggressive fluids and gases 
  • Hydrophobic 
  • Applicable for vents/exhausts for storage tanks 
  • Broad chemical compatibility 
  • Reliable particle retention and high purity in harsh process conditions 
  • Sterilized by steam or autoclave up to 125°C 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex FE pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex FE filters meet the test criteria for USP class VI-121°C Plastics

 

Memtrex FE-S

Memtrex FE-S absolute pleated cartridge filters are sterilizing grade filters for use in validated applications (S signifies sterilizing grade).  

  • Aqueous extracts from Memtrex FE-S filters contain less than 0.25 EU/ml. The filters typically exhibit low levels of non-volatile residues. 
  • Hydrophobic 
  • Sterilizing grade filter 
  • Sterilizable by steam up to 135°C or autoclave up to 121°C or sanitized with compatible chemical agents 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex FE-S pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex FE-S filters meet the test criteria for USP class VI-121°C Plastics.

 

Memtrex HFE

Memtrex HFE absolute pleated cartridge filters are made entirely from fluoropolymer materials including Halar (ECTFE) (Halar is a trademark of Ausimont.) and PTFE. Halar is an industrial-grade fluoropolymer with excellent solvent resistance. The benefits of Memtrex and HFE’s pleat pack technology ensure lower pressure drop and increasing flow rate. Memtrex HFE filters can withstand the harshest process conditions due to filter construction using these highly resistant materials. Providing broad chemical compatibility, you can count on Memtrex HFE to produce consistent, uniform process streams in your most demanding filtration applications. 

Memtrex HFE filters deliver high flow rates and high purity results with absolute rated efficiencies (99.9% filtration efficiency at rated pore size based on ASTM F795 and F661 test methods) and retention characteristics that outperform other filters. 

  • High temperature tolerance 
  • Hydrophobic 
  • Broad chemical compatibility (aromatics, halogenated solvents, oxidizers) 
  • Thermally bonded subassembly – no adhesives or binders used 
  • Sanitized with compatible chemical agents. These filters must not be autoclaved or steam sterilized. 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex HFE pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex HFE filters meet the test criteria for USP class VI-121°C Plastics. 

 

Memtrex PM

The 100% polypropylene construction of Memtrex PM absolute pleated cartridge filters offers low extractables, long service life, and broad chemical compatibility. Thermoplastic sealing techniques are used in the cartridge construction, eliminating the need for glues or sealers, which could leach contaminates. Memtrex PM utilizes high-flow polypropylene membranes, which are capable of protecting your gas, air, and liquid processes with absolute ratings of 0.1 and 0.2 micron. The Memtrex PM filter is integrity testable. 

  • Economical solution to PTFE 
  • Hydrophobic 
  • Broad chemical compatibility 
  • Ultrapure chemicals and vent filtration 
  • Long service life 
  • Sterilized by steam or autoclave. Sanitized with compatible chemical agents. 
  • Made in the USA 

Certifications

  • SUEZ certifies that the material contained in its Memtrex PM pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex PM filters meet the test criteria for USP class VI-121°C Plastics.

 

 

hydrophilic "affinity to water" filters 

used for aqueous (water-based) systems  

Memtrex KM

Memtrex KM absolute pleated cartridge filters are uniquely constructed for superior performance with SUEZ nylon 66 membrane. The Memtrex KM filter utilizes all-polypropylene construction to assure chemical compatibility and applicability to the widest range of applications. Memtrex KM filters are designed to ensure maximum downstream cleanliness. SUEZ nylon 66 membranes are naturally hydrophilic, non-shedding and do not contain leachable wetting agents. Thermoplastic sealing technologies are used in the cartridge construction, eliminating the need for potentially contaminating adhesives. Each cartridge is manufactured under strict production control and individually integrity tested. 

  • Nylon 66 membrane 
  • Polypropylene end caps, core, and cage 
  • Hydrophilic 
  • For applications sensitive to polyester 
  • Wide chemical compatibility 
  • Sterilized by autoclave or steam up to 125°C. Sanitized with compatible chemical agents 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex KM pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex KM filters meet the test criteria for USP class VI-121°C Plastics.

 

Memtrex MP

Memtrex MP absolute pleated cartridge filters, constructed with hydrophilic polyethersulfone (PES) membranes and all-polypropylene (PPE) components, exhibit enhanced throughput and reliable particle retention for superior performance in most applications. Memtrex MP filters are compatible with a broad range of chemicals and pH extremes. The low protein-binding characteristics of the polyethersulfone membranes ensure that Memtrex MP is suitable in a variety of beverage, chemical, and pharmaceutical applications. Constructed using thermal welding techniques, Memtrex MP filters do not contain any adhesives or additives, and individual integrity testing ensures the filters meet performance requirements. 

  • Reliable particle retention at high flow 
  • Hydrophilic 
  • Low protein retention 
  • Broad chemical & pH compatibility 
  • Sterilized by steam or autoclave. Filters that are steam sterilized must have Z or Q adapters. Sanitized with compatible chemical agents. 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex MP pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex MP filters meet the test criteria for USP class VI-121°C Plastics. 
  • ISO 9001 

 

Memtrex MP-B

Memtrex MP-B (B signifies beverage grade) absolute pleated cartridge filters offer a polyethersulfone (PES) membrane specifically designed for beverage applications. Memtrex MP-B filters exhibit low protein-binding, high flow rates, and high throughputs that are crucial for today’s demanding beverage process. Every Memtrex MP-B Filter is 100% integrity tested. As industry standards rise and new precautions are taken to ensure product purity, Memtrex MP-B filters provide reliable filtration for all your beverage applications. 

  • Specifically designed for beverage filtration 
  • Hydrophilic 
  • Cost effective option for food & beverage filtration 
  • Sterilized by steam or autoclave up to 125°C. Sanitized with compatible chemical agents 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex MP-B pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex MP-B filters meet the test criteria for USP class VI-121°C Plastics. 

 

Memtrex MP-E

Memtrex MP-E (E signifies electronic grade) absolute pleated cartridge filters incorporate a modified asymmetric polyethersulfone (PES) membrane with polypropylene support layer and components for enhanced service life and cleanliness in UPDI water and other microelectronics applications. Each Memtrex MP-E filter is manufactured utilizing a high-purity rinse to reduce TOC and trace metals below 5.0 ppb. Ideal for final filtration on DI water pads and POU applications. Memtrex MP-E filters are 100% integrity-tested to ensure reliable particle retention. 

  • Pre-rinsed cartridge in DI water 
  • Hydrophilic 
  • Sanitized with compatible chemical agents. Memtrex MP-E filters with polypropylene components may be sterilized by autoclave up to 121°C or steam up to 125°C. Memtrex MP-E filters with polyethylene components must not be sterilized by autoclave or steam.  
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex MP-E pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex-MP-E filters meet the test criteria for USP class VI-121°C Plastics 
  • Memtrex-MP-E filters pass the MEM Elution Cytotoxicity Test. 

 

Memtrex MP-S

Memtrex MP-S (S indicates sterilizing grade filter) absolute pleated cartridge filters are designed for final sterile filtration of biological and pharmaceutical products. The double-layer polyethersulfone (PES) membrane provides low protein-binding, high throughput, and broad chemical compatibility for critical filtration processes.  

  • Hydrophilic 
  • Sterilizing grade filter (S) 
  • Final filtration of biological & pharmaceutical fluids 
  • Pure water for dialysis; Water for Injection (WFI) 
  • Sterilized by autoclave or steam up to 125°C. Sanitized with compatible chemical agents. 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex MP-S pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex MP-S filters meet the test criteria for USP class VI-121°C Plastics. 

 

Memtrex NY

Memtrex NY absolute pleated cartridge filters are uniquely constructed for superior performance. The design incorporates a serial membrane layer and a large pore size membrane layer upstream of the final membrane layer. 

The first membrane acts like a prefilter to increase the life and efficiency of the cartridge and is highly effective in retaining difficult contaminants such as gelatinous particles. The final membrane layer ensures consistent retention characteristics.  

The Memtrex NY filter is designed to ensure maximum downstream cleanliness. SUEZ’s nylon 66 membranes are naturally hydrophilic, non-shedding, and do not contain leachable wetting agents. Thermoplastic sealing technologies are used in cartridge construction, eliminating the need for potentially contaminating adhesives. Memtrex NY filters are manufactured under strict production control and individually integrity tested. 

  • Used for fine chemicals and beverage processes 
  • Pre-filtration membrane for an enhanced service life 
  • Hydrophilic 
  • Compatible with organic solvent 
  • Sterilized by autoclave or steam up to 125° 
  • Made in the USA

Certifications 

  • SUEZ certifies that the material contained in its Memtrex NY pleated filters meet U.S. FDA requirements for food contact under the applicable regulations in 21 CFR. 
  • Memtrex NY filters meet the test criteria for USP class VI-121°C Plastics. 

 

Memtrex PC

Memtrex PC absolute pleated cartridge filters’ unique polycarbonate track-etch membrane leads the market for precise filtration, broad chemical compatibility, and fast conductivity and TOC rinse-down in ultrapure water systems. The filters’ precise micron cutoffs and very low pore sizes, down to 0.05 micron, provide high purity filtration for critical electronic, chemical, and highly technical processes. 

  • Fast rinse up 
  • Hydrophilic 
  • Precise and uniform pore distribution traps and removes microbes 
  • Medical and pharmaceutical applications 
  • Biologically inert 
  • Sanitized with compatible chemical agents 
  • Made in the USA

Certifications 

  • Memtrex PC filters meet the test criteria for USP class VI-121°C Plastics. 

 

 

Applications

hydrophobic "adverse to water" filters

Memtrex FE
  • Aggressive Solvents, such as Alcohols, Esters and Ketones 
  • Corrosive Acids and Bases 
  • Vents/Exhausts for Autoclaves, Fermenters, and Storage Tanks 
  • High Purity Chemicals and Water Used in Electronics Manufacturing 
Memtrex FE-S
  • Sterile Chemical, Air, Gas, and Vent 
  • Tank Venting 
  • Fermentation Air Supply 
  • WFI Tanks 
  • Autoclaves 
  • Chemicals 
  • Bioreactors 
  • Sterile Piping 
  • Final Filtration for Pharmaceutical Fluids 
Memtrex HFE - Halar PTFE
  • Chemicals 
  • Electronics; Microelectronics 
  • Pharmaceuticals 
  • Ozonated Water 9,000 ppm/hr 
Memtrex PM
  • Ultrapure Vent, Gas, and Air 
  • Etchants, Photoresists, and Developers 
  • Solvents, Acids, and Bases 
  • Ultrapure Chemicals 

      hydrophilic "affinity to water" filters 

      Memtrex KM
      • Microelectronics Ultrapure Water Filtration 
      • Filtration of Positive Photoresists 
      • Filtration of Organic Solvents 
      • Sensitive Applications to Polyester 
      • Electronics 
      Memtrex MP
      • Beverage 
      • Pharmaceutical 
      • Chemical 
      • Ink Filtration 
      • Microelectronics 
      Memtrex MP-B
      • Wine 
      • Beer 
      • Fruit Juices 
      • Bottled Water 
      Memtrex MP-E
      • Ultrapure Semiconductor Water 
      • High Purity Chemicals 
      • Point of Use Applications 
      Memtrex MP-S
      • Final Filtration of Drugs and Biologicals 
      • Final Filtration of Water for Injection (WFI) 
      • Final Filtration of Pure Water for Dialysis 
      • Large Volume Parenteral (LVP); Small Volume Parenteral (SVP) 
      • Diagnostics 
      • Tissue Culture Media 
      • Vaccines  
      Memtrex NY
      • Pharmaceutical Intermediates 
      • Positive Photoresists 
      • Fine Chemicals 
      • Final Filtration of Beverages 
      Memtrex PC
      • Pure Chemical Filtration 
      • Critical Electronic, Chemical, and Highly Technical Processes 
      • Medical and Pharmaceutical 
      • Oncology 
      • Medicine Manufacturing 
      • Inks and Dyes 
      • Ultrapure Water Filtration 
      • Plating Solutions 

                           

                          Chemical Compatibility

                          chemical compatibility 

                          SUEZ manufactures a series of melt-blown polypropylene depth filters as well as pleated filters made from a variety of microfiber and polymeric membrane materials. This wide array of cartridge media and elastomer materials ensure the right filter and configuration for your application. SUEZ filter cartridges are designed and manufactured for their resistance to a wide range of chemical solutions. 

                          Download SUEZ Chemical Compatibility Table

                          How to Use the Chemical Compatibility Table: 

                          R = Resistant. No significant change was observed in flow rate or bubble point of the membrane following 48 hours exposure to the test fluid at 77°F (25°C). 

                          LR = Limited Resistance. Moderate changes in physical properties or dimensions of membrane were observed. Filter may be suitable for short term, noncritical use. 

                          NR = Not Resistant. The membrane is basically unstable. Extensive shrinkage or swelling of the membrane may occur. The filter may gradually weaken or partially dissolve after extended exposure. 

                          O = Insufficient Data. Testing on your own solution is recommended. 

                          chemical resistance 

                          SUEZ polypropylene cartridge filters are made of pure polypropylene, an inert material which is compatible with a wide range of chemicals. No resins, binders, antistatic agents, or other materials are added during the manufacturing process. SUEZ polypropylene cartridge filters are manufactured with a proprietary melt-blown microfiber technology. This unique process thermally welds microscopic fibers of polypropylene into a compact matrix which resists fiber sloughing and particle unloading into the filtrate, even under extreme mechanical and chemical actions. The manufacturing operation is precisely controlled to yield cartridge filters with consistent micron ratings and true graded density for high particle retention and longer life. 

                          Download SUEZ Chemical Resistance Guide

                          How to Use the Chemical Resistance Guide: 

                          R = Recommended for use. 

                          NR = Not recommended for use. 

                          NA = No available test data. User should run test prior to use. 

                          FAQ

                          frequently asked questions 

                          Download Complete Pleated Filter FAQ Document

                          what is the difference between the Flotrex and Memtrex series? 

                          Flotrex filters use a pleated microfiber filtration media, while the Memtrex series use polymer membrane filtration media. As such, the Flotrex filters are more economical, but the Memtrex filters have lower micron ratings and sharper retentions than the Flotrex filters. Memtrex filters are typically used as the final filtration step, while the Flotrex may be used as a prefilter or final filter in some applications. 

                          when should I use a pleated or depth filter? 

                          Depth filters are primarily nominally-rated with 0.5 µm – 200 µm ratings, while the pleated filters are primarily absolute-rated between 0.03 µm – 40 µm. Depth filters are typically cheaper and have higher dirt holding capacities. As such, they are often used as prefilters to the final pleated filters and are often used when feed waters have a wide particle size distribution and/or higher levels of suspended solids, such as RO pre-filtration, Oil & Gas, and chemical processing. 

                          Pleated filters, with their lower and more precise micron ratings are used when the particle size distribution is much narrower and for absolute removal of smaller particles, as is the case of pharmaceuticals, microelectronics, and vent filtration. Furthermore, pleated filters have lower pressure drops for comparable flow rates and micron ratings than depth filters due to their higher porosities and thinner media. 

                          what does absolute-rated mean? 

                          Absolute-rated has come to mean an efficiency level that is defined by a controlled laboratory test. While there is no official standard for absolute ratings, a manufacturer will make the efficiency data of these filters available. SUEZ’s absolute filters have an efficiency level of 99% or greater. This means that at least 99% of particles with a diameter larger than the micron rating will be excluded by the filter. 

                          what does nominal-rated mean? 

                          Manufacturers do not typically document efficiency data for nominally-rated filters as they do for absolute filters. Nominal ratings are meant only as a guide and typically rank a cartridge filter’s efficiency compared to other cartridges in the same product line. For example, a 5-micron filter from a manufacturer will be more efficient than their 10-micron but less than the 1-micron cartridge. For more information on the distinction between absolute and nominal ratings, see the associated application bulletin in the SUEZ library. 

                          how do I choose which pleated filter is right for my application? 

                           The greatest factors in choosing a pleated filter for your application are the hydrophobicity/hydrophilicity of the filter media, its chemical compatibility, and the micron rating. Hydrophobic (“water-hating”) filters are typically used for vent filtration or harsh chemical environments, while hydrophilic (“water-loving”) filters are used for aqueous (water-based) systems. Chemical compatibility is important to ensure that the filter does not become compromised during regular use. The micron rating indicates what size particles will be restricted from passing through the filter. SUEZ has the technical expertise to help you find the right filter for your application to maximize lifetime and efficiency. Contact your sales representative or application engineer with any questions.