Most compact FRP membrane housings

FRP Membrane Housings and RO Skids for Water Treatment Systems

Knappe Composites designs and manufactures compact FRP membrane housings, pressure vessels, skids and stainless-steel components for reverse osmosis and nanofiltration applications.

40+ years of expertise

In-house manufacturing

EU PED 2014/68 & ASME Section X design

ACS certified for drinking water applications

Knappe Composites has more than 40 years of unparalleled experience and expertise in the manufacture of inlined FRP membrane housings.
The company’s intensive research into polymers and composites has led to many inventions that have revolutionized the membrane housing market.
Knappe Composites manufactures all major components in-house, ensuring high quality, short lead times and flexibility in serving its customers.

FRP Membrane Housings

Compact Xtype FRP membrane housings designed for reverse osmosis and nanofiltration systems, compatible with standard 8-inch membranes.

  • Modular design
  • Compact design to build systems with the smallest footprint on the market
  • Fewer models of membrane housings
  • Easy inventory for resellers and better availability for OEMs
  • Fewer manifolds / couplings required
  • Flow control for each housing
  • Permeate monitoring and probing
  • Inliner for a long product service life
  • Self-sealing end plate/head system
  • Drinking water certification, French ACS
  • Cost savings due to compact design, fewer headers, couplings

Reverse Osmosis Skids

Custom Xtype skids assembled with membrane housings, manifolds and piping according to project requirements.

  • Compact and modular design with the smallest footprint on the market
  • 3D design as to membrane projection and customer requirements
    Xtype FRP membrane housings
  • Manifolds at the top and/or at the bottom or to the left and/or to the right.
  • Manifolds in 316/duplex/super duplex stainless steel
  • Bends in 316/duplex/super duplex stainless steel
  • Couplings in 316/duplex stainless steel
  • Frame with adjustable feet in 304 stainless steel
  • Skid unit fully assembled prior to shipment (complete system pressure tested upon request)

Stainless Steel Manifolds

High-quality stainless-steel manifolds manufactured for demanding water treatment and desalination applications.

  • Manufactured by orbital or robotic fiber laser welding and automatic filler wire feeding
  • Diameters of 3in, 4in, 6in, 8in, 10in or 12in
  • 316, duplex or super duplex stainless steel

Couplings, Flanges and Fittings

Stainless-steel components designed to complete RO and NF membrane housing assemblies.

  • Weld neck and slip on flanges with stub ends
  • Stainless steel flexible couplings
  • 45 and 90 degrees bends in short and long radius, end caps
  • 316 or Duplex stainless steel

Membrane Housings, RO Skids and Components

A complete range of compact solutions for reverse osmosis, nanofiltration and industrial water treatment systems.

MEMBRANE HOUSINGS

COUPLINGS, FLANGES, FITTINGS

Applications for RO and NF Water Treatment Systems

Knappe Composites products are used in demanding water treatment projects, from drinking water and industrial water to desalination, ultrapure water and wastewater applications.

  • Drinking water
  • Industrial water
  • Ultrapure water
  • Wastewater treatment
  • Desalination
  • BWRO and SWRO systems

4 decades of expertise

Our company has 4 decades of experience and is a trusted and reliable industry leader. Our deep understanding and proven track record guarantee our clients’ confidence in our capabilities. Throughout our history, we have maintained a commitment to excellence and consistently deliver exceptional results. This enduring commitment has cemented our reputation for reliability and success.