KOCH Membranes

KOCH Membranes

FLUID SYSTEMS was at the forefront of developing reverse osmosis systems since the 1960's when the first spiral wound membrane element was created. Since then, the company has gone on to innovate other types of membranes such as cellulose acetate RO membranes and thin-film composite membranes, which offer their own unique features. As a result, FlUID SYSTEMS have contributed greatly to the modernization of membrane filtration throughout the world. 

FLUID SYSTEMS was acquired by Koch Membrane Systems in 1998, one of the leading membrane producing companies in the world. FLUID SYSTEMS continues to be a major part of Koch today through assisting in the enhancement of filtration and treatment processes by high quality products and additional operational knowledge.  

KOCH Membranes


  • 4" & 8" Sizes Available
  • BWRO Membranes
  • SWRO Membranes
  • Nanofiltration Elements
  • High Rejection Elements
  • Low Pressure Membranes

Pure Aqua has over 20 years of experience as a world-wide distributor of KOCH Membranes and are designed with sturdy high rejection and low fouling features for consistent and efficient operation for treating wastewater and industrial stream applications. 


KOCH Membranes

FLUID SYSTEMS was an early pioneer in reverse osmosis (RO) technology. Since 1967, when FLUID SYSTEMS developed and patented the first spiral wound element, it has created a line of innovation in the membrane filtration world. From the first cellulose acetate RO membrane ever installed commercially, through the first multi-leaf spiral wound element, to the introduction of the first thin-film composite membrane, TFC® – now a trademark recognized as a worldwide industry standard, the FLUID SYSTEMS company and brand continue to bring advanced solutions to the filtration market

Membrane configurations include tubular, spiral wound and hollow fiber. In addition to mainstream treatment applications, the Koch products address many specialty applications including dairy, wine and juice and paint recovery. Of the major membrane manufacturers, they likely have the widest line of products including complete systems for some applications. In the area of reverse osmosis, they have led in the manufacture of 18" diameter spiral wound membrane elements, including the development of handling and loading equipment.

After years of operating manufacturing facilities on the east and west coasts of the United States, they have recently consolidated those operations at their longtime location near Boston, MA. Major product brands manufactured by Koch Membrane Systems include Romicon, Fluid systems and Puron.

The FLUID SYSTEMS® RO and NF Products
Our RO and NF products are available in standard 8” FRP hard overwrap configuration (8040) in standard and high area construction. All products have drinking water certification under NSF/ANSI Standards 61 and 372. We offer a wide range of reverse osmosis and nanofiltration products to serve in municipal and industrial water applications:

Koch Membranes
ULP Ultra Low Pressure Elements for Tap & Brackish Water Thin Film Membranes, 4040ULP, 4820ULP, 8821ULP, 8831ULP-575 magnum..etc.
TFC® HR Robust high rejection and low fouling brackish water RO products for consistent operation treating industrial streams and wastewater effluents, Thin Film Membranes, 8822HR-400, 8822HR-365, 4820HR, 4040HR, ROGA8221HR …etc.
TFC® SS High rejection seawater RO membranes for treatment of high TDS industrial streams and seawater desalination, 2540SWHF, 4021SW, 1820SW, 1820HF, 2822SS, ..etc.
TFC® SR Low energy NF products for water softening, sulfate removal from seawater and removal of organics.




Engineered for water softening and organics removal, our high-flow, low-pressure and selective-rejection nanofiltration (NF) membrane elements are recognized for exceptional performance and dependability. The NF Series easily removes hardness using fewer chemicals while significantly reducing total organic carbon.

Developed for the most demanding water treatment environments, our RO series is equipped for complex applications including seawater desalination, beverage production, water softening for power generation, and industries where high-rejection purification is required.

High Recovery RO Packaged Systems
With approximately 20,000 systems operating around the globe, we have the experience and knowledge to design and build the system that will fit your needs. At KMS we understand that high recovery and reliable RO solutions can make your operations efficient and cost effective. We will provide you with innovative and complete solutions using our pre-engineered or custom designed systems. Our process engineers, mechanical design professionals and field service team will accompany you from early stage of development and pilot demonstration, to a successful system commissioning.

Benefits of KMS High Recovery RO Systems

  • Proven performance record in the most demanding applications
  • Compact design
  • High recovery, up to 95%
  • Simple to operate, reliable and dependable
  • Supported by an experienced

Pure Aqua will partner with you throughout the life cycle of your membrane filtration system. Our experienced technical team will provide global service and support and will work directly with you to maximize process efficiency. Our service and maintenance program, provides the tools to keep your system operation at the highest level, including:

  • Membrane process optimization
  • Plant audits
  • Helping in selection and calibration of instruments
  • Choosing the right RO antiscalant chemical
  • Data collection, analysis & reporting
  • Operator training
  • Telephone support

 For more information, please view/download our "Data Sheet"