The ECD270 consists of a membrane, a support disc, and a saddle connecting part. When oxygenation and aeration, compressed air is diffused into the water through the microporous air cloth layer to achieve the purpose of oxygenation and aeration.
Technical Parameters
MODEL
ECD215 (7inch)
ECD/AFD270 (9inch)
ECD/AFD350 (12inch)
Active Surface Area (m2)
0.0225
0.0375
0.065
Size (inch)
7 (215mm)
9 (251mm)
12 (330mm)
Design Flow (m3/hr)
0.5-2.5
2.5-5
4.0-8.3
Membrane Thickness (mm)
2
2
2
Hole Size (mm)
1mm or 2mm
1mm or 2mm
1mm or 2mm
Slit Quantity
3900
6600
10155
SOTE (%) (4.5m Water Depth)
22-40
31-59
35-59
Drag Loss (Pa)
1285-2124
2200-4100
2000-4400
Service Life (year)
Over 5
Over 5
Over 5
Drawings & Dimensions
EPDM Membrane Performance Parameters
Item
Criteria
Unit
Values
Hardness
ASTM D2240-95
Shore A
60
Tensile strength
ASTM D412-92
N/mm2
>2000
Tear strength
ASTMD624-91,Die T
N/m
>110
Permanent deformation at 100% elongation
ASTM D412-92
%
<5%
Maximum elongation at tear
ASTM D412-92
%
600
Ozone Resistance (70hours, 40°C, 50mPa partial ozone pressure, no decomposition)
ASTM D1171-94
-
eligible (voter etc)
UV resistance
-
-
Qualified
Hot air ageing resistance (70hours, 70°C)
ASTM D573-88
-
Tear strength change rate <3%
-
Change in tearing elongation <25%
-
Hardness change <5 degrees
Rate of change of deformation in compression (22hours, 70°C)
Attachment: ECD270 aeration ring structure schematic membrane
Performance parameters of the support disc
Item
Unit
Value
Proportion
-
0.905
Water absorption
%
0.02
Tensile strength
N/mm2
34.5
Coefficient of thermal expansion
-
05
Maximum temperature
℃
100
Introduction to the performance of EPDM membrane coated with PTFE and VITON
PTFE (polytetrafluoroethylene) E and VITON are synthetic rubbers commonly known as fluoroelastomers. They have a wide range of resistance to a variety of chemicals, solvents, oils, greases, etc. that can cause damage to conventional rubber, and are therefore recognised as a material with excellent performance. However, the disadvantage i that they are expensive. So SSI developed the application of fluoroelastomer coatings, a patented method of permanently bonding to EPDM surfaces or other substrates, which has proven to be a proven method. SSI's new technology allows the diaphragm to not only maintain the excellent physical properties of traditional rubber materials, but also to provide the chemical, solvent, and grease resistance of the world's highest-grade rubber materials, at a cost you can afford. You can afford it. SSI's new fluoroelastomer-coated EPDM diaphragms have been proven to be free of scaling and any change in material properties in many wastewater treatment plants that have experienced diaphragm damage due to calcium build-up and solvent corrosion
