GE P&W Dairy PW Series User Manual
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FSsmDairyPWSeries_EN.doc Nov-13
Fact Sheet
Membrane
P-Series, Polyethersulfone
Model
Spacer mil
(mm)
Active area
ft2 (m2)
Outer wrap
Part
number
DAIRY PW3838C30
30 (0.76)
66 (6.1)
Cage
1228024
DAIRY PW3838C50
50 (1.27)
51 (4.7)
Cage
1229303
DAIRY PW5838C50
50 (1.27)
127 (11.8)
Cage
1207391
DAIRY PW6338C30
30 (0.76)
212 (19.7)
Cage
1207392
DAIRY PW6338C50
50 (1.27)
169 (15.7)
Cage
1207393
DAIRY PW6338C65
65 (1.65)
132 (12.6)
Cage
1223985
DAIRY PW8038C30
30 (0.76)
330 (30.6)
Cage
1230789
DAIRY PW8038C50
50 (1.27)
254 (23.6)
Cage
1230680
Model1
Dimensions, inches (cm)
Boxed
A
B2
C3
Weight
lbs (kg)
DAIRY PW3838
38.0
(96.5)
0.833
(2.12)
3.79
(9.6)
7
(3.2)
DAIRY PW5838
38.0
(96.5)
1.138
(2.89)
5.71
(14.5)
18
(8.2)
DAIRY PW6338
38.0
(96.5)
1.138
(2.89)
6.34
(16.1)
18
(8.2)
DAIRY PW8038
38.0
(96.5)
1.125
(2.86)
7.91
(20.1)
29
(13.2)
Typical Operating Pressure
80-135 psig (555 – 931 kPa)
Typical Operating Flux
10-25GFD (15-40LMH)
Clean Water Flux (CWF)1
59GFD (100LMH) @ 30psi and 50°C
Maximum Operating Pressure
200 psig (1,379 kPa)
Maximum Temperature
Continuous operation: 122°F (50°C)
Clean In Place (CIP): 122°F (50°C)
pH Range
Continuous operation: 4.0-11.0,
Clean In Place (CIP): 2.0-11.5
Maximum Pressure Drop
Over an element: 12 psig (83 kPa)
Per housing: 50 psig (345 kPa)
Chlorine Tolerance
5,000+ ppm-days
Dairy PW Series
Ultrafiltration – Protein Concentration
The Dairy PW Series family of polyethersulfone ultrafiltration membrane elements are characterized
by a 30,000 molecular weight cut-off. Dairy PW Elements are typically used for protein concentrate
up to 20% either from milk and sweet whey (not
suitable for acid whey).
These elements feature a Durasan* Cage patented
outer wrap, a selection of feed spacers, and polysulfone parts.
The Dairy PW elements comply with:
FDA Regulations relevant sections of 21CFR
EU Framework 1935/2004/EC
Table 1: Element Specification
Table 2: Dimensions and Weight
1
These elements are bagged dry 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.
Table 4: Operating and CIP 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%.
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