Filtration Systems & Membranes

1. Membrane Technologies: DuPont FilmTec, Toray and MANN+HUMMEL

• DuPont FilmTec RO Membranes: deliver high, stable salt rejection (BW30 PRO-400: 99.6%) and minimum energy consumption in brackish water, seawater, and low-energy reverse osmosis lines.
• Toray RO, NF and UF Membranes: fully aromatic polyamide composite TM-series RO/NF elements alongside hollow fiber (0.01 µm) UF modules; offering high fouling tolerance and FDA Title 21 food/health compliance.
• MANN+HUMMEL UF Modules: PureULTRA II (PVDF) and AQUADYN (PAN) hollow fiber modules provide high flux and long membrane life in water loaded with oil, grease, and suspended solids.

2. Precision Process Cartridges: Merck Millipore, Parker, 3M and Chemtech

• Merck Millipore (Polygard-CT): graded-pore-structure pure polypropylene depth filters, offering high dirt-holding capacity in pharmaceutical and electronics manufacturing.
• Parker Fulflo (Abso-Mate): 99.98% absolute-efficiency pleated polypropylene cartridges; a backwashable design provides a long service life.
• 3M (Betapure AU): thermally bonded bicomponent fiber technology prevents pore deformation and particle bypass even under high differential pressure.
• Chemtech CHT Melt-Blown Cartridges: a graded-pore structure spanning 0.5 to 120 microns, DOE/SOE end-cap configurations, and Ph. Eur compliance provide an economical solution for general industrial and pretreatment lines.

3. Bag Filters and Sanitary Filter Housings

• Pall / FSI Bag Filters: polypropylene, polyester felt, and nylon monofilament bags in the 1–1000 micron range; carbon or 316L stainless steel housings holding 1 to 24 bags (flow up to ≈ 654 m³/h).
• 316L Sanitary Filter Housings: electropolished internal surfaces, Tri-Clamp connections, and jacketed, heated vent/air filter housings meeting pharmaceutical and food industry standards.

Chemtech CHT cartridges are rated for continuous operation up to 82°C and differential pressure up to 4 bar (at 40°C), and are used in chemical, petrochemical, food & beverage, RO pretreatment, and general water treatment applications. They meet the European Pharmacopoeia's filter element requirements and hold a certificate from the Polish National Institute of Hygiene (PZH).

They can be configured to match your existing housing and your process's chemical compatibility requirements, with four end-cap types (DOE, 222/226 flat and fin variants, FC with O-ring, and double open-ended MDOE) and four gasket materials (NBR, EPDM, silicone, and Viton).

Beyond Chemtech, we also supply Merck Millipore, Parker, and 3M cartridge families for process-specific requirements. Merck Millipore's Polygard-CT series is made from 100% pure polypropylene with a graded-density matrix combining two different nominal pore cut points in a single cartridge; available in 0.5 to 50 micron pore sizes and 25–100 cm lengths, it is used in primary clarification applications. Parker's Fulflo Abso-Mate series is an all-polypropylene pleated depth filter; its 0.2–70 micron absolute-rated models (β=5000, 99.98% efficiency), backwashable media, and resistance up to 200°F make it a preferred choice for critical process fluids. 3M's Betapure AU series has a bicomponent fiber structure (polypropylene/polyethylene or polyester/co-polyester) with 18 absolute ratings between 2 and 190 microns; its rigid construction preserves the pore structure even as differential pressure rises, providing consistent filtration efficiency over its service life (max. 80 psid, 175–250°F range).

For fluids with a high fouling load, we offer Pall (formerly FSI — Filter Specialists, Inc.) bag filter housings and bags as an economical solution ahead of, or instead of, cartridge filtration. Standard multi-bag housings are built with a capacity of 1 to 24 bags, a flow range of 15–2,880 GPM (approximately 3.4–654 m³/h for water with a 10-micron felt bag), and 100, 150, or 300 psi operating pressure options; the housing material can be carbon steel, 304, or 316 stainless steel. Compact single-bag models (e.g., the SBF series) offer a stainless housing rated 300 psi @ 250°F with an easy-access hinged cover for space-constrained applications.

Bags are available in a wide range from nominal 1 to 1000 microns, in polypropylene or polyester felt, or welded-seam (no needle holes) nylon monofilament mesh. They are preferred for paint, resin, ink, and coating baths, injection water systems, RO pre-protection, and general process water applications requiring a balance of high flow and low cost.

Membrane Groups

For reverse osmosis (RO), ultrafiltration (UF), and nanofiltration (NF) membranes, we can supply DuPont FilmTec (formerly DOW FilmTec), Toray, and MANN+HUMMEL products matched to the project's flow rate, salt rejection, and fouling profile — these three brands are, based on our long-standing supply experience, among our preferred membrane solutions on our projects.

DuPont FilmTec's brackish water elements (e.g., BW30-PRO-400) provide 99.6% stable salt rejection (minimum 99.4%) under standard test conditions and can operate at pressures up to 600 psi, while its seawater elements (SW30) offer 99.4–99.7% stabilized rejection depending on the model — designed for large-scale industrial and municipal water treatment systems. Toray's RO/NF product range uses a cross-linked, fully aromatic polyamide composite membrane structure; the TM700D series achieves 99.80% nominal salt rejection per element (minimum 99.65%) and a permeate flow of 9.8–45.7 m³/day. Toray also offers, on the UF side, 0.01 micron nominal pore HFUG hollow fiber modules for RO pretreatment and TUF-series sanitary UF membranes compliant with FDA/USDA 3-A sanitation standards. MANN+HUMMEL's UF portfolio includes the PureULTRA II (PVDF hollow fiber, 60–107 m² filtration area) and AQUADYN (PAN hollow fiber, 45–65 m², for oil/grease-loaded water) modules, which — at approximately 0.02–0.03 micron pore size — are used for bacteria, virus, and parasite removal.

The right membrane family and model are engineered based on feedwater analysis, target permeate quality, recovery rate, and the existing system configuration.

Filter Housings

The performance of cartridge, bag, and membrane elements is directly tied to selecting the right filter housing. We offer several housing types matched to your process:

• Cartridge housings (DOE/SOE): DOE (Double Open End) housings are built with a body, cap, cartridge support plate, tie-rods, and a knife-edge sealing arrangement; SOE (Single Open End) housings are built with an outer shell, a perforated-cage-supported filter element, and a positive sealing arrangement — both are available with various end-connection options.
• Sanitary housings: for pharmaceutical, biotech, WFI, and food & beverage applications, in single or multi-round configurations; built with a positioning plate, a gauge port, and a silicone O-ring/gasket.
• Modular housings: a rigid-core design combining the advantages of a closed filter body with depth filter plates; the module is replaced once filter capacity is exhausted and pressure reaches 2–2.5 bar — used for paint, ink, adhesive, and high-viscosity solutions.
• High-flow housings: compact, compression-seal, high-flow-capacity bodies offering a long service life and low operating cost; preferred for RO pretreatment, desalination, and large-volume water treatment lines.
• Jacketed vent/air filter housings: maintain tank/vessel pressure while preserving sterility in fermentation, bioprocess, and product recovery lines; glass-wool insulated, with optional electronically temperature-controlled jacketed designs.

Housing material and connection type are determined by the system's sanitation requirements, the fluid's chemical compatibility, and the existing piping configuration.