GE P&W Dairy AF Series User Manual
Fact Sheet
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FSsmDairyAFSeries_EN.doc Nov-13
Membrane
A-Series, Thin Film Membrane (TFM*)
Model
Spacer
mil (mm)
Active area
ft2 (m2)
Part
number
Dairy AF3838C30
30 (0.76)
83 (7.7)
1206647
Dairy AF3838C50
50 (1.27)
52 (4.8)
1255669
Dairy AF3840C30
30 (0.76)
85 (7.9)
1206648
Dairy AF3840C50
50 (1.27)
57 (5.3)
1255063
Dairy AF8038C30
30 (0.76)
390 (36.2)
1221893
Dairy AF8038C50
50 (1.27)
290 (26.9)
1227202
Model1
Dimensions, inches (cm)
Boxed
A
B2
C
Weight
lbs (kg)
AF3838C
38.00
(96.5)
0.833
(2.12)
3.8
(9.6) 7 (3.2)
AF3840C
38.75
(98.4)
0.833
(2.12)
3.8
(9.6) 7 (3.2)
AF8038C
38.00
(96.5)
1.125
(2.86)
7.91
(20.1)
29
(13.2)
Typical Operating Pressure
200-500psi (1,379-3,447kPa)
Typical Operating Flux
5-20 GFD (8-34 LMH)
Clean Water Flux (CWF)1
14 GFD (24 LMH) @ 225psi
Maximum Operating Pressure
600psi (4,137kPa)
Maximum Permeate Pressure2
60 psi (413 kPa)
Maximum Temperature
122°F (50°C)
pH Range
2.0-11.0
Recommended Pressure Drop
Over an element: 12psi (83kPa)
Maximum Pressure Drop
Over an element: 15psi (103kPa)
Per housing: 60psi (414kPa)
Chlorine Tolerance
1000ppm-hours
dechlorination recommended
Temperature
‘pH minimum
‘pH maximum
50°C (122°F)
2.0
11.5
45°C (113°F)
1.5
11.5
35°C (95°F)
1.5
11.5
25°C (77°F)
1.0
12.0
Dairy AF Series
Dairy Processing – Lactose Concentration
The A-Series family of proprietary thin film reverse osmosis membrane elements is characterized by high flux and
excellent sodium chloride rejection. The A-Series membrane has an average rejection of 99.5% on 2,000ppm
NaCl at 25°C (77°F) and 225psi operating pressure.
The Dairy AF elements provide high rejection of dissolved
solids and low molecular weight organic constituents at
operating pressures up to 600psi. These elements are
designed for processing streams previously treated by
ultrafiltration and are typically used in applications
where the concentrate is used for animal feed. Applications include whey and milk protein concentration and
lactose recovery.
The Dairy AF elements feature a Durasan* Cage patented outer wrap, standard feed spacers and polysulfone
parts. These elements comply with the USDA guidelines
for the sanitary design and fabrication of dairy processing equipment or applicable 3-A sanitary standards.
Table 1: Element Specification
Table 2: Dimensions and Weight
1
These elements are dried and bagged before shipping.
2
Internal diameter.
3
The element diameter (dimension C) is designed for optimum performance in GE
Water & Process Technologies pressure vessels. Others pressure vessel dimension
and tolerance may result in excessive bypass and loss of capacity.
Table 3: Operating parameters
Figure 1: Element Dimensions Diagram
1
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%.
2
Permeate pressure should never exceed the concentrate pressure.
Table 4: CIP limits for RO elements
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