GE P&W Spiral Wound Membranes - CD Series - Manual

Fact Sheet
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FS1264EN.doc Nov-13
CD Series
High Rejection Brackish Water RO Elements (Cellulose Acetate)
The C-Series family, a triacetate/diacetate blend,
has a higher flux and better mechanical stability
than standard cellulose acetate. C-Series elements
offer an increased chlorine resistance compared to
thin-film elements.
CD High Rejection Elements are used for brackish
water desalination and process stream.
Table 1: Element Specification
Membrane C-Series, cellulose acetate
Model
Average
permeate flow
gpd (m3/day) 1,2
Average NaCl
rejection 1,2
Minimum NaCl
rejection 1,2
CD4025T 1,000 (3.8) 98.5% 96.5%
CD8040F 6,000 (22.7) 98.5% 96.5%
1 Average salt rejection after 24 hours operation. Individual flow rate may vary
+25%/-15%.
² Testing conditions: 2,000ppm NaCl solution at 425psi (2,930kPa) operating
pressure, 77°F, pH 6.5 and 15% recovery.
Model
Active area
ft 2 (m 2 )
Outer wrap
Part
number
CD4025T 55 (5.1) Tape 1206834
CD8040F 390 (36.2) Fiberglass 1206837
Figure 1: Element Dimensions Diagram - Female
Table 2: Dimensions and Weight
Model²
Dimensions, inches (cm) Boxed
A B 1 C 3
Weight
lbs (kg)
CD4025T
25.0
(63.5)
0.625
(1.59)
3.9
(9.9)
5
(2.3)
CD8040F
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
32
(14.5)
1 Internal diameter.
² These elements are dried then bagged before shipping.
3 The element diameter (dimension C) is designed for optimum performance in GE
pressure vessels. Others pressure vessel dimension and tolerance may result in
excessive bypass and loss of capacity.
Table 3: Operating and CIP parameters
Typical Operating Pressure 140 - 400psi (965-2,758kPa)
Typical Operating Flux 10-18 GFD (17-30 LMH)
Maximum Operating Pressure 450psi (3,103kPa)
Maximum Temperature Continuous Operation: 86°F (30°C)
Clean-In-Place (CIP): 86°F (30°C
pH Range Continuous Operation: 5.0-6.5,
Clean-In-Place (CIP): 3.0-8.0
Maximum Pressure Drop Over an element: 12psi (83kPa)
Per housing: 50psi (345kPa)
Chlorine Tolerance 1ppm maximum continuous
30ppm for 30 min. during sanitization
Feedwater NTU < 1
SDI < 5