GE P&W Spiral Wound Membranes - Dairy PW Series - Manual

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FSsmDairyPWSeries_EN.doc Nov-13
Fact Sheet
Dairy PW Series
Ultrafiltration – Protein Concentration
The Dairy PW Series family of polyethersulfone ul-
trafiltration membrane elements are characterized
by a 30,000 molecular weight cut-off. Dairy PW El-
ements 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 polysul-
fone parts.
The Dairy PW elements comply with:
 FDA Regulations relevant sections of 21CFR
 EU Framework 1935/2004/EC
Table 1: Element Specification
Membrane P-Series, Polyethersulfone
Model
Spacer mil
(mm)
Active area
ft 2 (m 2 )
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
Figure 1: Element Dimensions Diagram
Table 2: Dimensions and Weight
Model 1
Dimensions, inches (cm) Boxed
A B 2 C 3
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)
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
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
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%.