Free Flow Plate™ Technology

SANI Membranes Free Flow Plate™ technology is a new innovative way of designing sanitary membrane elements, modules and systems for MF and UF filtration. The objective behind the patented Free Flow Plate™ Membrane Module is to design an affordable membrane module where the sanitary qualities and energy consumption is the main focus - from the initial idea generation phase.

The Free Flow Plates have developed over time from Hollow Plates™ to Free Flow Area plates, where turbulence conditions on outside and inside the plate have been optimized, increasing span of operation.

The resulting Free Flow Plate™ Membrane Modules have a lot of added benefits as a direct consequence of the simple, open and sanitary design.

The basic principle behind the Free Flow Plate™ technology is a rigid molded homopolymeric plate, where membranes are welded to each side of the Free Flow Plate™ and thereby seperates the exterior feed part of the plate from the interior permeate part. The interior part of the Free Flow Plate™ is designed to transport the permeated media to permeate outlets in the Free Flow Plate with minimal pressure loss. The interior design also enables flush flow and CIP cleaning of the permeate channels.

The individual Free Flow Plates™ are welded together in such a way that the permeate outlets form a permeate channel with outlets from each plate isolated from the feed channel. The Free Flow Plates™ are also welded together in additional locations defining the accurate plate to plate distance as the room between the Free Flow Plates™ define the feed channel.

The Free Flow Plate™ Elements are finally mounted in a presurewithstanding molded housings, defining the feed compartment. The result is the highly sanitary 2,5 m2 Free Flow Plate™ Module with a compact stack of Free Flow Plates and individual outlets that only need connections to feed and permeate to start filtrating. The modular Free Flow Plate™ Module can easily be built into larger filtration systems vertically or horizontally.

              The 0,35 m2 Free Flow Plate™ Laboratory Element                           The modular 2,5 m2 Free Flow Plate™ Module

The Free Flow Plate™ elements and modules has many advantages in conventional cross flow filtration systems and is an essential part of  SANI Membranes disruptive Vibro filtration systems:

A 60 m2 cross flow loop with 24 Free Flow Plate™ Modules                     A 15 m2 Vibro system with 6 Free Flow Plate™ Modules

Benefits of the SANI Membranes Free Flow Plate™ Technology

The highly sanitary SANI Membranes Free Flow Plate™ Module is an advanced membrane filtration module that allows free flow filtration over a flat membrane surface. The Free Flow Plate™ Module is designed with a sanitary focus, securing high clean-ability and highly sanitary products. The Free Flow Plate™ Module is easy to service and engineered to reduce energy consumption and improve the separation process.

The Free Flow Plate™ Module in Operation

Unique operation key features of the Free Flow Plate™ Module.


  • Free Flow – 1.7 mm membrane to membrane distance.
  • Very uniform TMP throughout the system – sharper cut-off.
  • Can handle very difficult feeds with high viscosity, high solids loading etc.
  • 100% Drainable – no product loss.
  • Energy efficient - turbulence is only created at the membrane surface.

> Higher concentration, sharper cut-off

The Sanitary Free Flow Plate™ Modules

Unique sanitary key features of the Free Flow Plate™ Module.

  • Open and Clean design – Sanitary.
  • No membrane wrinkles – Sanitary.
  • No feed or permeate spacers – Sanitary.
  • No flow dead areas - Sanitary.
  • 100% Drainable - faster CIP.
  • 100% Drainable - reduced water & chemical consumption.
  • Permeate side can be CIP cleaned.

> Shorter CIP time, less water & chemicals



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