Duraflow

What Duraflow does

Duraflow LLC, founded in 2003 by Joseph Lander and William Matheson, is a privately held U.S. manufacturer of crossflow tubular membrane filters based in Tewksbury, Massachusetts. Its core product is PVDF (polyvinylidene fluoride) membrane cast on 1-inch porous polymeric tubes with a nominal pore size of 0.1 micron, configured into modules ranging from single-tube DF-401 units to 24-tube DF-824 arrays. The technology is differentiated by a proprietary PVDF formulation that increases pore density and substrate bonding, enabling operation at twice the flux rate of competing tubular membranes (500–1,000 GFD), chemical resistance to acids, bases, and oxidizers that yields a 5–10 year service life, and tolerance of 2–3 wt% TSS in high-solids industrial wastewater. The company bundles membranes with a proprietary chemistry line (heavy-metal precipitants DF-610/640/665/675, cationic coagulants DF-766/770/775/781, and specialty reagents) and offers two branded processes — DF-ROBR™ for RO brine recovery up to 95% and DuraSoft for hardness/silica/fluoride removal.

The company sells exclusively through a global network of certified OEM partners and distributors spanning 15 countries across North America, Asia-Pacific, Europe, the Middle East, and Africa, with a particularly developed presence in China via a dedicated local team and Chinese-language site. End customers are heavy industrial sites — metal finishing and electroplating, power generation (cooling tower blowdown, FGD wastewater, ZLD), semiconductor, printed circuits, steel mills, solar/PV manufacturing, and aluminum production — where Duraflow systems handle applications including wastewater compliance discharge, water recycle/reuse, and precious metal recovery. Pricing is quote-based on custom-engineered systems sold through OEM partners as multi-year projects, with no public price list disclosed.

Duraflow is ISO 9001:2015 certified (awarded 2017) and holds a patent on the DF-665 heavy-metal precipitant alongside registered trademarks for DF-ROBR™ and DuraSoft. The company is founder-controlled with no disclosed institutional investors, no acquisition history, no reported M&A activity, and no disclosed revenue or funding rounds. Management consists of co-founders Joe Lander (Principal) and William Matheson (Managing Director), supported by a U.S./China commercial team and the global OEM channel.

Name

Duraflow

Legal name

Duraflow LLC

Website

https://duraflow.biz

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

11–50 employees

Short description

Duraflow LLC is a U.S. manufacturer of crossflow tubular PVDF membrane filters and proprietary treatment chemistries, sold exclusively through certified OEM partners in 15 countries to industrial customers in metal finishing, power generation, semiconductor, steel, solar, and electronics for wastewater compliance, water recycling, and RO brine recovery.

Ownership category

akta.pro rank

Product category

Industrial Membrane Filtration Equipment

SIC

Unsupported Plastics Film & Sheet (3081), Miscellaneous Chemical Products (2890)

akta.pro primary industry

Separation & Filtration Equipment (Filters, Centrifuges, Membranes) (IMAHAEAB)

akta.pro secondary industries

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ), Effluent Polishing & Filtration (MBR/UF/RO/GAC) (EUANADAL), Membrane Treatment Chemicals (RO/NF/UF) (IMAEAJAF), Membranes, Consumables & Chemicals (Elements, Antiscalants, Cleaning) (EUANAFAJ)

Keywords

• Tubular membrane filters
• Industrial wastewater treatment
• Water recycling systems
• Crossflow microfiltration
• RO brine recovery

Headquarters

HQ city

Tewksbury

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Membrane Modules: Sale of tubular membrane filter modules in various configurations (DF-401 through DF-424 series) with different tube counts, membrane areas, and flow ratings. Products include standard 254 series (400 and 800 series) and 125 series (ES series).
2. Specialty Treatment Chemicals: Complementary specialty treatment chemicals for wastewater compliance and water recycle sold through Duraflow distributors. Product line includes heavy metal precipitants (DF-610, DF-640, DF-665, DF-675), cationic coagulants (DF-766, DF-770, DF-775, DF-781), caustic replacement (DF-340), and dry film photo resist stripper treatment (DF-978).
3. Services and Technical Support: Comprehensive services including application assessment, pilot testing, process engineering, equipment specs, system design, equipment fabrication, installation, commissioning, operator training, troubleshooting, operation optimization, and O&M cost reduction. Provided through certified OEM partners.
4. OEM Training and Certification: Training programs for pre-qualified local OEMs covering industrial wastewater characterization, water chemistry manipulation, Duraflow membrane technology, treatment process design, system operating procedures, membrane cleaning skills, and troubleshooting.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Duraflow designs, engineers, and manufactures specialty PVDF crossflow tubular membrane filters (1-inch, 0.1 micron nominal pore size) used for industrial wastewater treatment, water recycling, and RO pretreatment. The company complements its membrane modules with proprietary treatment chemistries (heavy metal precipitants, cationic coagulants, caustic replacement) and integrated processes such as DF-ROBR (reverse osmosis brine recovery) and DuraSoft (hardness/silica removal and water recycling). Sales, engineering, installation, commissioning, and training are delivered through a global network of certified OEM partners.

Differentiator

Problem solved

Functional benefit

Products and services

• Duraflow Tubular Membrane Modules PVDF crossflow tubular membrane filters cast on 1-inch diameter porous polymeric tubes with 0.1 micron nominal pore size, available in configurations from 1 to 24 tubes per module, designed for industrial wastewater treatment with high solids tolerance and chemical resistance.
• DF-401 Membrane Module Single-tube membrane module with 1.5 ft² membrane area, 1.5 inch diameter, 72 inches long; rated flow 0.5-1.0 GPM at 40 PSI and maximum operating pressure 60 PSI.
• DF-404 Membrane Module 4-tube membrane module with 6 ft² membrane area, 4 inch diameter, 72 inches long; rated flow 2-4 GPM at 40 PSI.
• DF-405 Membrane Module 5-tube membrane module with 7.5 ft² membrane area; rated flow 2.5-5.0 GPM at 40 PSI; 25% flow improvement over previous generation.
• DF-406 Membrane Module 6-tube membrane module with 9 ft² membrane area, 5 inch diameter, 72 inches long; rated flow 3.0-6.0 GPM at 40 PSI.
• DF-415 Membrane Module 10-tube membrane module with 15 ft² membrane area, 6 inch diameter, 72 inches long; rated flow 5-10 GPM at 40 PSI.
• DF-414 Membrane Module 14-tube membrane module with 21 ft² membrane area; rated flow 7-14 GPM at 40 PSI; 40% flow improvement over previous generation.
• DF-419 Membrane Module 19-tube membrane module with 28.5 ft² membrane area, 8 inch diameter, 72 inches long; rated flow 10-20 GPM at 40 PSI.
• DF-424 Membrane Module 24-tube membrane module with 36 ft² membrane area, 8 inch diameter, 72 inches long; rated flow 12-24 GPM at 40 PSI; 26% flow improvement over previous generation.
• DF-824 24-Tube High-Capacity Tubular Membrane Filter First 8-inch diameter 24-tube tubular membrane filter with 70% more membrane filtration area than the existing 6 inch 14-tube product, engineered for high-capacity industrial installations such as the 288-module precious metal recovery and RO desalination system in China.
• DF-ROBR RO Brine Recovery System Proprietary tubular membrane technology for RO brine wastewater recovery achieving up to 95% recovery, using custom pre-treatment chemistry to remove heavy metals, organics, silica colloids, biological matter, and surfactants that foul RO membranes.
• DuraSoft Process Advanced wastewater recycling process combining Duraflow crossflow tubular membrane technology with chemical softening to produce high-quality permeate for desalination pretreatment, applied to cooling tower blow-down, RO brine, FGD wastewater, acid mine drainage, and hard groundwater.
• DF-665 Heavy Metal Precipitant Patented inorganic liquid containing thio reaction products for precipitating toxic heavy metals from wastewater and groundwater to trace levels (parts per billion).
• DF-610 Heavy Metal Precipitant Proprietary blend of sodium dimethyldithiocarbamate with cationic coagulant for precipitating metal ions from industrial effluents; effective pH range 4.0-11.0 and removes metals to below 0.1 ppm.
• DF-640 Heavy Metal Precipitant Aqueous solution of sodium dimethyldithiocarbamate for precipitating metal ions from industrial effluents containing 1-500 ppm total metal ions.
• DF-675 Heavy Metal Precipitant Aqueous solution effective for precipitating heavy metal compounds, particularly when metals are complexed with chelating agents that inhibit formation of metal hydroxides.
• DF-766 Cationic Coagulant Aqueous solution of inorganic cationic and organic coagulants for increasing particle size of precipitated metal compounds; effective pH range 4.0-11.0.
• DF-770 Cationic Coagulant Aqueous solution of inorganic cationic coagulant for increasing particle size of precipitated metal compounds, used with anionic polymer to enhance settling rates.
• DF-775 Cationic Coagulant Aqueous solution of inorganic cationic coagulant for increasing particle size of precipitated metal compounds; effective pH range 4.0-11.0.
• DF-781 Cationic Coagulant Aqueous solution of inorganic cationic coagulant for industrial wastewater treatment; effective pH range 4.0-11.0.
• DF-340 Caustic Replacement Non-hazardous reagent replacing sodium hydroxide for neutralization of acidic wastewaters; contains calcium hydroxide with dispersants and stabilizers up to 38% by weight, not regulated under SARA Title III.
• DF-978 Dry Film Photo Resist Stripper Treatment Proprietary single-step liquid for precipitating dry-film photo-resist from alkaline developer and stripper solutions in printed circuit manufacturing.
• Membrane System Engineering and Field Services Comprehensive services delivered through certified OEM partners including application assessment, pilot testing, process engineering, equipment specifications, system design, equipment fabrication, installation, commissioning, operator training, troubleshooting, operation optimization, and O&M cost reduction.
• OEM Training and Certification Program Rigorous training and certification programs for pre-qualified local OEMs covering industrial wastewater characterization, water chemistry manipulation, Duraflow membrane technology, treatment process design, system operating procedures, membrane cleaning skills, and troubleshooting.

Quantifiable outcome

• Water recovery up to 94-95% when used with RO systems
• +6 more outcomes

Named customers7 records

Segments7 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• J&T TechnologiescoreImplementation/ SI/ Consulting PartnerPottstown, PA-based technology company that designs wastewater treatment systems using Duraflow tubular membranes for metal finishing and electroplating operations. Partner designed system for Magnetic Inspection Laboratories Inc. containing 48 Duraflow DF-415 modules.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Toray Industries (Toray Membrane): Toray's Membrane Division manufactures RO, NF, UF, and MF membrane elements used in water reuse, desalination, and industrial wastewater. Toray overlaps with Duraflow in semiconductor, power, and metal finishing pre-treatment and is a global benchmark for PVDF and other polymeric membrane chemistry.
• Novasep: Novasep provides membrane-based purification solutions for industrial biotech, food, and specialty chemical wastewater. Novasep and Duraflow share an industrial process-membrane focus and overlap in applications requiring pretreatment of high-solids streams before downstream separation.
• Hydranautics (Nitto Group): Hydranautics, a Nitto Group company, is a leading manufacturer of RO/NF/UF spiral-wound and capillary membranes. Hydranautics competes with Duraflow in industrial RO pretreatment and water reuse and shares overlapping semiconductor and metal-finishing customers, though it does not specialize in tubular crossflow MF.
• PCI Membranes (Filtration Group): PCI Membranes (now part of Filtration Group) is a long-standing manufacturer of tubular UF/MF membranes for industrial effluent and process water. PCI and Duraflow serve overlapping verticals including metal finishing, food, and chemical processing with comparable tubular crossflow product configurations.
• Berghof Membrane Technology: Berghof (Germany) manufactures tubular UF/MF membranes for industrial wastewater and process applications, closely mirroring Duraflow's tubular product line and high-solids tolerance. Berghof is a relevant direct competitor in the European industrial wastewater segment.
• Pall Corporation (Danaher): Pall is a global leader in filtration, separation, and purification, including tubular and hollow-fiber membrane modules for industrial wastewater, metal finishing, and chemical processing. Pall overlaps with Duraflow across metal finishing, power, and electronics customers and serves as a benchmark for global membrane scale.
• Koch Membrane Systems (Koch Separation Solutions): Koch Separation Solutions is one of the largest global manufacturers of tubular and hollow-fiber membranes used in industrial wastewater, food, and dairy processing. It directly competes with Duraflow's tubular PVDF membranes for high-solids industrial effluent applications and shares the same OEM-and-distributor go-to-market playbook.
• Pentair X-Flow: Pentair's X-Flow division manufactures hollow-fiber and tubular UF/MF membranes for industrial water and wastewater reuse. X-Flow directly competes in the same tubular membrane category for high-solids industrial applications and shares Duraflow's focus on pre-RO polishing for water reuse.

Broad incumbents

• Veolia Water Technologies: Veolia (via its Water Technologies & Solutions and ZeeWeed product lines) is a global water treatment incumbent offering MF/UF/MBR/RO systems and services. Veolia competes broadly with Duraflow in industrial wastewater, RO pretreatment, and zero liquid discharge, but offers a far broader portfolio rather than specializing in tubular MF.
• DuPont Water Solutions: DuPont Water Solutions (formerly Dow FilmTec) supplies RO, NF, UF, and ion-exchange technologies globally. DuPont competes with Duraflow in industrial water reuse and pre-RO filtration and benefits from significantly larger R&D and global channel resources than Duraflow.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Duraflow