GE P&W DK Series User Manual
Fact Sheet
Find a contact near you by visiting www.gewater.com and clicking on “Contact Us”.
* Trademark of General Electric Company; may be registered in one or more countries.
©2013, General Electric Company. All rights reserved.
AM-FSpwDKSeires_EN.doc Nov-13
Membrane
D-Series, Thin-film membrane (TFM*)
Model
Average
permeate flow
gpd (m3/day)
1,2
Minimum MgSO4
rejection
1,2
DK2540C30
560 (2.1)
98%
DK2540C50
350 (2.3)
98%
DK2540F30
540 (2.0)
98%
DK2540F50
340 (1.3)
98%
DK4040C30
2,000 (7.6)
98%
DK4040C50
1,300 (4.9)
98%
DK4040F30
2,000 (7.6)
98%
DK4040F50
1,300 (4.9)
98%
DK8040C30
6,900 (21.1)
98%
DK8040C50
5,400 (20.4)
98%
DK8040F30
7,800 (30.0)
98%
DK8040F50
5,400 (20.4)
98%
Model
Spacer
mil (mm)
Active area
ft2 (m2)
Outer wrap
Part
number
DK2540C30
30 (0.76)
28 (2.6)
Cage
1206918
DK2540C50
50 (1.27)
18 (1.6)
Cage
1206919
DK2540F30
30 (0.76)
28 (2.6)
Fiberglass
1206925
DK2540F50
50 (1.27)
18 (1.6)
Fiberglass
1206926
DK4040C30
30 (0.76)
98 (9.1)
Cage
1206947
DK4040C50
50 (1.27)
65 (6.0)
Cage
1206946
DK4040F30
30 (0.76)
98 (9.1)
Fiberglass
3050075
DK4040F50
50 (1.27)
65 (6.0)
Fiberglass
3050073
DK8040C30
30 (0.76)
347 (32.1)
Cage
1206978
DK8040C50
50 (1.27)
270 (25.1)
Cage
1206979
DK8040F30
30 (0.76)
390 (36.2)
Fiberglass
1206993
DK8040F50
50 (1.27)
272 (25.3)
Fiberglass
1206994
DK Series
Industrial High Rejection 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 DK High Rejection 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)
DK2540C30
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DK2540C50
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DK2540F30
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1) 4 (1.8)
DK2540F50
40.0
(101.6)
0.75
(1.90) OD
2.4
(6.1)
4
(1.8)
DK4040C30
40.0
(101.6)
0.625
(1.59)
3.9
(9.9)
9
(4.1)
DK4040C50
40.0
(101.6)
0.625
(1.59)
3.9
(9.9)
9
(4.1)
DK4040F30
40.0
(101.6)
0.75
(1.90) OD
3.9
(9.9)
9
(4.1)
DK4040F30
40.0
(101.6)
0.75
(1.90) OD
3.9
(9.9)
9
(4.1)
DK8040C30
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DK8040C50
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DK8040F30
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
29
(13.2)
DK8040F50
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): 122°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
Loading...