GE P&W DL Series User Manual
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FS1248EN.doc Nov-13
Fact Sheet
Membrane
D-Series, Thin-Film Membrane (TFM*)
Model
Average permeate flow
GPD (m3/day)
1,2
Minimum MgSO4
rejection
1,2
DL2540C50
430 (1.6)
96 %
DL2540F30
650 (2.5)
96 %
DL2540F50
450 (1.7)
96 %
DL4040C30
2,400 (9.0)
96 %
DL4040C50
1,600 (6.0)
96 %
DL4040F30
2,200 (8.3)
96 %
DL4040F50
1,500 (5.7)
96 %
DL8040C30
9,100 (34.4)
96 %
DL8040C50
6,300 (23.9)
96 %
DL8040F30
8,800 (33.3)
96 %
DL8040F50
6,300 (23.9)
96 %
Model
Spacer
mil (mm)
Active area
ft2 (m2)
Outer wrap
Part
number
DL2540C50
50 (1.27)
18 (1.7)
Cage
1207015
DL2540F30
30 (0.76)
27 (2.5)
Fiberglass
1207018
DL2540F50
50 (1.27)
18 (1.7)
Fiberglass
1207019
DL4040C30
30 (0.76)
102 (9.4)
Cage
1207030
DL4040C50
50 (1.27)
66 (6.1)
Cage
1207028
DL4040F30
30 (0.76)
91 (8.5)
Fiberglass
3050068
DL4040F50
50 (1.27)
66 (6.1)
Fiberglass
3050067
DL8040C30
30 (0.76)
380 (35.3)
Cage
1207040
DL8040C50
50 (1.27)
261 (24.2)
Cage
1207041
DL8040F30
30 (0.76)
366 (34.0)
Fiberglass
1207048
DL8040F50
50 (1.27)
264 (24.5)
Fiberglass
1207049
DL Series
Industrial High Flow Nanofiltration Elements
The D-Series family of proprietary thin-film nanofiltration membrane elements is characterized by an
approximate molecular weight cut-off of 150-300
Dalton for uncharged organic molecules. Divalent
and multivalent anions are preferentially rejected
by the membrane while monovalent ion 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 D-Series nanofiltration
membrane systems to operate at feed pressures
below those of RO systems.
Among other applications DL High Flow NF Elements are used for dye removal/concentration, sodium chloride diafiltration and metals recovery.
Table 1: Element Specification
1
Average salt rejection after 24 hours operation.
Individual flow rate may vary ±25%.
2
Testing conditions: 2,000ppm MgSO4 solution at 110psi (760kPa) operating
pressure, 77 °F (25°C), 15 % recovery.
Figure 1: Element Dimensions Diagram – Female
Figure 2: Element Dimensions Diagram – Male
Model1
Dimensions, inches (cm)
Boxed
A
B2
C3
Weight
lbs (kg)
DL2540C50
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DL2540F30
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DL2540F50
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DL4040C30
40.0
(101.6)
0.625
(1.59)
3.9
(9.9) 9 (4.1)
DL4040C50
40.0
(101.6)
0.625
(1.59)
3.9
(9.9) 9 (4.1)
DL4040F30
40.0
(101.6)
0.75
(1.90) OD
3.9
(9.9) 9 (4.1)
DL4040F50
40.0
(101.6)
0.75
(1.90) OD
3.9
(9.9) 9 (4.1)
DL8040C30
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DL8040C50
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DL8040F30
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DL8040F50
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
Typical Operating Flux
5 – 20 GFD (8 – 34 LMH)
Maximum Operating Pressure
600psi (4,137kPa) if T < 95°F (35°C)
435psi (3,000kPa) if T > 95°F (35°C)
Maximum Temperature
Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 104°F (50°C)
‘pH Range
Continuous Operation: 3-9
Clean-In-Place (CIP): 2-10.5
Maximum Pressure Drop
Over an element: 15psi (103kPa)
Per housing: 60psi (414kPa)
Chlorine Tolerance
500 ppm hours,
dechlorination recommended
Table 2: Dimensions and Weight
Table 3: Operating and CIP parameters
1
These elements are dried then bagged before shipping.
2
Internal diameter unless specified OD (outside diameter).
3
The element diameter (dimension C) is designed for optimum performance in GE
pressure vessels. Other pressure vessel dimension and tolerance may result in
excessive bypass and loss of capacity.
Page 2 Fact Sheet
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