Nanofiltration: Flat Sheet Membranes

Nanofiltration membranes have a molecular weight cut-off range of 100 – 800 Daltons, and reject solutes based on size and charge. NF membranes have the unique ability to reject multivalent ions, and varying degrees of monovalent ions, which is a useful tool in the process or chemical engineer’s “tool kit” of technology.

In certain high solids applications, flat sheet nanofiltration membrane provide excellent performance and membrane life vs. operating cost. Unlike hollow fiber membranes, flat sheet membranes have a very strong support material in which the polymeric membrane layer is rooted to that greatly increases physical durability.

Synder Filtration offers a complete line of dry and wet nanofiltration flat sheet membranes. With product sizes ranging from one square foot to thousands of linear feet, Synder can supply flat sheet NF membranes for process research, pilot testing, spiral element winding, and for use in plate & frame membrane systems.

Model	Polymer	Approx. Molecular Weight Cutoff	Typical Operating Flux	Avg Lactose Rejection¹	Avg MgSO4 Rejection²	Avg NaCI Rejection³
NFS	Proprietary PA TFC	100-250Da	30-40 GFD	99.5%	99.5%	50.0%
NFX	Proprietary PA TFC	150-300Da	20-25 GFD	99.0%	99.0%	40.0%
NFW	Proprietary PA TFC	300-500Da	45-50 GFD	98.5%	97.0%	20.0%
NFG	Proprietary PA TFC	600-800Da	55-60 GFD	60.0%	50.0%	10.0%

¹Test Conditions: 2% Lactose solution at 110PSI (760 kPa) operating pressure, 77° F (25° C)
²Test Conditions 2,000ppm MgSO4 Solution at 110PSI (760 kPa) operating pressure, 77° F (25° C)
³Test Conditions 2,000ppm NaCI Solution at 110PSI (760 kPa) operating pressure, 77° F (25° C)

Synder holds a large inventory of flat sheet rolls in order to provide our customers with the fastest lead times possible.

Nanofiltration flat sheet membranes may also be provided in specific die cut patterns after an initial feasibility assessment is completed by Synder’s experienced technical staff. Please contact us for more information. You will receive a personal response from one of our experienced team members within 24 hours.