ST (PES 300kDa) – Sanitary

Sanitary Ultrafiltration Spiral-Wound Element:
LV (PES 300kDa)

Synder Filtration’s Ultrafiltration Elements offer an
optimal combination of both flux and rejection in a
comprehensive range of MWCO’s.
Contact us today
to learn more about our complete line of membrane
products and services.

Synder’s ST membrane is Synder’s most popular ultrafiltration membrane used for whey protein (WPC/WPI) concentration in the dairy industry. With a molecular weight cut-off of 10kDa, it offers an ideal blend of flux and protein separation, and is sometimes used in conjunction with MT and/or VT for these types of applications. Ultrafiltration membranes such as ST are an important part of whey processing technology as they are able to efficiently and cost-effectively concentrate proteins within different types of whey (acid, sweet or casein) and maintain membrane durability. Diafiltration can also be employed during UF processing to increase yields and recovery of the proteins. MAX (high pH/high temperature) versions of Synder’s ultrafiltration membranes are also available, and can be sanitized without the use of chlorine, further enhancing the membrane and equipment life. Other applications for this membrane include protein/enzyme concentration, endotoxin and pyrogen removal and blood protein concentration in the biopharmaceutical industry, and gelatin concentration and egg white concentration in the food & beverage industry.

STANDARD SERIES BENEFITS

Conforms to 3
–
A, FDA, and USDA sanitary
standards
Widest range of UF MWCO’s available
Good resistance to pH and temperature
High resistance to fouling
Customizable dimensions for unique housings

COMMON APPLICATIONS

Corn wet milling

Element Specifications

RECOMMENDED OPERATING PARAMETERS

Operating Parameters
Maximum Temperature	55°C (131°F)
pH Range @ Max Temperature	3-9
pH Range @ Ambient Temperature	2-10

Pressure	PSI	Bar
Max Inlet Pressure	120	8.3
Min Outlet Pressure	10	0.7
Max Differential Pressure per Element	18	1.2
Max Permeate Backpressure	5	0.3

Note: Soft start on boost pumps required to rninimize pressure/flow shocks to elements.

Cleaning Parameters
Maximum Temperature (Short term <30min)	50°C (122°F)
pH Range @ Max Temperature	2-11
pH Range @ Ambient Temperature	1.8-11

Chlorine	Norm PPM	Max PPM
Free Chlorine During Operation	0	<0.1
Chlorine During CIP at pH10.8-11.0 and 50°C	150	180

Note: Maximum chlorine exposure for all elements is 30 minutes per day at pH and temperature conditions listed above.

Dairy Product Total Solids Limits

Feed Spacer (in mils)

Sweet Whey Max. T.S.

Acid Whey Max. T.S.

Skim Milk Max. T.S.

Whole Milk Max. T.S.

Note: Trials should be made to determine temperature and viscosity effects.

Element Dimensions

Element	Model No.	Diameter (B) in	Length (A) in	P.W.T. ID
1.8"	1812F	1.8	12	0.63
2.5"	2519 2540F 2540M*	2.5 2.5 2.5	19.25 40 38	0.63 0.63 0.75
3.8"	3838 3838.75 3850 3938.75	3.8 3.8 3.8 4.0	38 38.75 50 38.75	0.83 0.83 0.83 0.63
4.3"	4333 4335 4335.5 4336 4338	4.3 4.3 4.3 4.3 4.3	33 35 35.5 36 38	0.83 0.83 0.83 0.83 0.83
5.8"	5838	5.8	38	1.14
6.3"	6338 6324	6.3 6.3	38 24	1.14 1.14
6.4"	6438 6424	6.4 6.4	38 24	1.14 1.14
7.8"	7838 7824	7.8 7.8	38 24	1.14 1.14
8"	8038 8040 8238 8240 8338 8340	8.0 8.0 8.2 8.2 8.3 8.3	38 40 38 40 38 40	1.14 1.14 1.14 1.14 1.14 1.14
9.8"	9838	9.8	38	1.14
10"	10338	10.3	38	1.14

*1″ permeate tube extensions (0.75″ OD)

Recommended Element Cross Flow Rate

Element

Feed Spacer (in miles)

1.8"

m³/hr
gpm

1
4

1
5

1
6

2
7

2.5"

m³/hr
gpm

2
9

2
10

3
11

3
12

3
13

3.8"

m³/hr
gpm

5
22

6
25

7
29

8
33

8
35

4.3"

m³/hr
gpm

6
29

7
32

9
38

10
44

10
46

5.8"

m³/hr
gpm

12
51

13
59

16
69

18
78

19
83

6.3"

m³/hr
gpm

15
65

17
74

20
88

22
99

24
105

m³/hr
gpm

21
94

24
107

29
128

33
143

35
154

10"

m³/hr
gpm

42
184

48
213

57
250

64
283

68
299

The recommended cross flow rate will be subject to differential pressure limitations and specific applications. Please consult Synder Filtration if additional information is needed.

Synder_SpecificMembranes-img1

Membrane Area(SQ. FT.)

Element

Model No.

Feed Spacer (in mils)

1.8"

1812F

N/A

3.6

N/A

2.5"

2519
2540F
2540M

15
34
35

13
29
30

10
22
23

N/A
N/A
N/A

3.8"

3838
3838.75
3850
3938.75

85
86
100
102

72
74
84
89

58
59
70
69

46
47
52
53

38
39
46
47

4.3"

4333
4335
4335.5
4336
4338

99
105
107
108
115

86
91
93
94
100

66
71
72
73
77

53
56
57
58
62

44
47
48
49
52

5.8"

5838

210

184

147

114

6.3"

6324
6338

150
246

134
220

107
176

83
136

70
115

6.4"

6424
6438

157
258

140
230

112
184

83
136

74
122

7.8"

7824
7838

242
396

210
344

166
273

132
216

110
180

8038
8040
8238
8240
8338
8340

414
414
441
441
450
450

368
368
384
384
400
400

287
287
302
302
311
311

225
225
238
238
245
245

189
189
201
201
207
207

9.8"

9838

N/A

564

440

351

296

10"

10338

N/A

620

492

386

326

TECHNICAL NOTES

For element sizes not listed, please call or email Synder Filtration for details. We can design an element to fit your exact needs -just specify the element outer diameter (OD) or vessel/housing inner diameter (ID), element inner diameter (ID), and length. Elements are also available with or without a controlled bypass tail. Additional feed spacers are also available. Trials should be conducted to determine optimal application conditions.

Element Descriptions

Model No.	OD (in.)	L (in.)	ID* (in.)	Weight (lb)	Weight (kg)
1812F	1.8	12	0.63	1.0	0.5
2519 2540F 2540M*	2.5 2.5 2.5	19.25 40 38	0.63 0.63 0.75	2 4 4	0.9 1.8 1.8
3838 3838.75 3850 3938.75	3.8 3.8 3.8 4.0	38 38.75 50 38.75	0.83 0.83 0.83 0.63	10 10 13 10	4.5 4.5 5.9 4.5
4333 4335 4335.5 4336 4338	4.3 4.3 4.3 4.3 4.3	33 35 35.5 36 38	0.83 0.83 0.83 0.83 0.83	11 11 11 11 12	5.0 5.2 5.2 5.2 5.4
5838	5.8	38	1.14	15	7
6338 6324 6438 6424	6.3 6.3 6.4 6.4	38 24 38 24	1.14 1.14 1.14 1.14	16 17 29 18	7 7.7 13.2 8.2
7838 7824	7.8 7.8	38 24	1.14 1.14	40 26	18.2 11.8
8038 8040 8238 8240 8338 8340	8.0 8.0 8.2 8.2 8.3 8.3	38 40 38 40 38 40	1.14 1.14 1.14 1.14 1.14 1.14	38 39 38 40 40 40	17.2 17.7 17.2 18 18 18
9838	9.8	38	1.14	42	19.1
10338	10.3	38	1.14	50	22.7

*1″ permeate tube extensions (0.75″ OD)
Note: Different diameters are available. Please specify your requirements when ordering. Specifications are subject to change without notice.