Lenntech
Fact Sheet
info@lenntech.com Tel. +31-152-610-900
www.lenntech.com Fax. +31-152-616-289
Sugar Processing
Monosaccharide Purification
Duracon* NF-2 8040C
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 96% on
2000 ppm MgSO4 at 25°C and 100 psig net pressure.
The Duracon NF-2 8040C Elements are typically
used in food related processes requiring stringent
sanitary procedures. This element is designed for
processing streams previously treated by ultrafiltration or similar pretreatment. They are typically used
for processing sugar solutions in food-related processes. Applications include monosacharride purification and applications requiring reduction of BOD.
Table 2: Pressure Drops
∆P - psig (kPa)
Active Area
ft2 (m2)
Part
Number
Duracon NF-2 8040C-35D
35 (0.89)
342 (31.8)
1227615
Duracon NF-2 8040C-50D
50 (1.27)
263 (24.4)
1207044
2
3
4
5
15 (103)
30 (207)
45 (310)
60 (414)
60 (414)
Table 3: Dimensions and Weight
Dimensions, inches (cm)
Model
Dry Boxed
A
B
C
Weight
lbs (kg)
Duracon NF-2 8040C-35D
40.00
(101.6)
1.125
(2.857)
7.91
(20.1)1
32
(14.53)
Duracon NF-2 8040C-50D
40.00
(101.6)
1.125
(2.857)
7.91
(20.1) 1
32
(14.53)
1
The element diameter (dimension C) is designed for optimum performance in GE
Water & Process Technologies pressure vessels. Other pressure vessel dimension
and tolerance may result in excessive bypass and loss of capacity.
Table 4: Operating and Design Parameters
Table 1: Element Specification
Spacer
Mil (mm)
1
Figure 1: Element Dimensions Diagram
The Duracon NF-2 8040C Elements feature a
Durasan* patented outerwrap, a selection of feed
spacers and polysulfone parts.
Model
Elements per Pressure Vessel
Maximum
Pressure Drop
Membrane
D-Series Thin-film membrane (TFM*)
Typical Operating
Pressure
Typical Operating
Process Flux
Clean Water Flux (CWF)2
70-400 psig (483-2,757 kPa)
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
500 ppm-hours, dechlorination recommended
Chlorine Tolerance
10-20 GFD (17-34 LMH)
18 GFD (30 LMH) @ 100 psig
2
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 .
FS1190EN 0607