Lenntech
Fact Sheet
info@lenntech.com Tel. +31-152-610-900
www.lenntech.com Fax. +31-152-616-289
Sugar Processing Mineral and
Acid Removal Duracon* NF-1
38040C-50P
The Duracon family of proprietary thin-film nanofiltration membrane elements are characterized by
an approximate molecular weight cut-off of 150300 daltons for uncharged organic molecules. Divalent and multivalent ions are preferentially rejected
by the membrane while monovalent ions rejection
is dependent upon feed concentration and composition. Since monovalent ions pass through the
membrane, they do not contribute to the osmotic
pressure, thus enabling Duracon nanofiltration
membrane systems to operate at feed pressures
below those of RO systems. Duracon D-Series
membrane has an average rejection of 98% on
2000 ppm MgSO4 at 25°C and 100 psig net pressure.
The Duracon NF-1 3840C-50P Elements are typically used in food related processes requiring stringent sanitary procedures. These elements are
designed for high crossflow, daily CIP and the ability
to handle suspended solids, while still maintaining
element integrity. They are typically used for processing sugar solutions in food-related processes.
Applications include demineralization, deacidification and sugar concentration.
Table 2: Pressure Drops
∆P - psig (kPa)
Active Area
ft2 (m2)
2
3
4
5
15 (103)
30 (207)
45 (310)
60 (414)
60 (414)
Table 3: Dimensions and Weight
Dimensions, inches (cm)
Model
Duracon NF-1 3840C-50P
Dry Boxed
A
B
C
Weight
lbs (kg)
38.75
(98.43)
0.833
(2.12)
3.79
(9.6)
12
(5.4)
Table 4: Operating and Design Parameters
Table 1: Element Specification
Spacer
Mil (mm)
1
Figure 1: Element Dimensions Diagram
The Duracon NF-1 3840C-50P Elements feature a
Durasan* patented outerwrap, a selection of feed
spacers and polysulfone parts.
Model
Elements per Pressure Vessel
Maximum
Pressure Drop
Part
Number
Membrane
D-Series Thin-film membrane (TFM*)
Typical Operating
Pressure
70-400 psig (483-2,757 kPa)
Typical Operating
Process Flux
7-20 GFD (11.9-34 LMH)
Clean Water Flux (CWF)1
14 GFD (24 LMH) @ 100 psig
Maximum Pressure
600 psig (4,137 kPa)
Maximum Temperature
122°F (50°C)
Recommended pH
Operating Range 3.0-10.0,
Cleaning Range 1.0-11.0
Chlorine Tolerance
500 ppm-hours, dechlorination recommended
1
Duracon NF-1 3840C-50P
50 (1.27)
53 (4.9)
1206941
Clean water flux (CWF) is the rate of water permeability through the membrane
after cleaning (CIP) at reproducible temperature and pressure. It is important to
monitor CWF after each cleaning cycle to determine if the system is being
cleaned effectively. CWF can vary ±25%.
©2006, General Electric Company. All rights reserved.
*Tr a dema r k of Genera l Elec tr ic Compa ny ; ma y be r egis ter ed in one or more c ountr ies .
FS1192EN 0607