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GE P&W Spiral Wound Membranes - DL Series User Manual

Dl series, Industrial high flow nanofiltration elements, Fact sheet

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FS1248EN.doc Nov-13


Fact Sheet

DL Series

Industrial High Flow Nanofiltration Elements

The D-Series family of proprietary thin-film nanofil-
tration 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 composi-
tion. Since monovalent ions pass through the mem-
brane, 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 Ele-
ments are used for dye removal/concentration, so-
dium chloride diafiltration and metals recovery.

Table 1: Element Specification

Membrane

D-Series, Thin-Film Membrane (TFM*)

Model

Average permeate flow

GPD (m

3

/day)

1,2

Minimum MgSO

4

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 %

1

Average salt rejection after 24 hours operation.

Individual flow rate may vary ±25%.

2

Testing conditions: 2,000ppm MgSO

4

solution at 110psi (760kPa) operating

pressure, 77 °F (25°C), 15 % recovery.

Model

Spacer

mil (mm)

Active area

ft

2

(m

2

)

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

Figure 1: Element Dimensions Diagram – Female

Figure 2: Element Dimensions Diagram – Male

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