GE P&W Dairy SF Series User Manual

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FSsmDairySFSeries_EN.doc Sep-13

Fact Sheet

Membrane

S-Series, Thin Film Membrane (TFM*)

Model

Average

NaCl

rejection

Spacer

mil (mm)

Active area

ft2 (m2)

Part

number

Dairy SF3840C30

98.5%

30 (0.76)

77 (7.2)

1207515

Dairy SF3840C50

98.5%

50 (1.27)

58 (5.4)

1207517

Model1

Dimensions, inches (cm)

Boxed

A

B2

C

Weight
lbs (kg)

SF3840C

38.75
(98.4)

0.833
(2.12)

3.8

(9.6) 7 (3.2)

Typical Operating Pressure

200-500psi (1,379-3,447kPa)

Typical Operating Flux

5-18 GFD (8-30 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

3.0-10.0

Recommended Pressure Drop

Over an element: 12psi (83kPa)

Maximum Pressure Drop

Over an element: 15psi (103kPa)
Per housing: 60psi (414kPa)

Chlorine Tolerance

500ppm-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 SF Series

Dairy Processing – Lactose Concentration

The S-Series family of proprietary thin film reverse
osmosis membrane elements is characterized by a
high sodium chloride rejection and a smooth, foul­ing-resistant membrane surface. The S-Series
membrane has an average rejection of 98.5% on
2,000ppm NaCl at 25°C (77°F) and 225psi operating
pressure.

The Diary SF elements provide high rejection of pro­teins and low molecular weight organic constitu­ents at operating pressures up to 600psi. These
elements are typically used for concentrating whey
and skim and cheese milk in food-related processes
requiring stringent sanitary procedures. Other ap­plications may include lactose and sugar concen­tration.

The Dairy SF elements feature a Durasan* Cage pa­tented outer wrap, standard feed spacers and poly­sulfone parts.

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

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