Fine Bubble Disc Diffusers
At SSI Inc, we manufacture our disc diffusers with compression molded membranes. Standard materials are EPDM and fluoroelastomer layered EPDM. Learn about our selection of membrane materials including PTFE coated membranes.
Standard 9" Disc - AFD270
Design Flow: 1.5-3.0 SCFM (2.5-5.0 Nm³/hr)
Flow Range: 0-7 SCFM (0-12 Nm³/hr)
Slit Quantity: 6,600
Standard 12" Disc - AFD350
Design Flow: 2.5-5.0 SCFM (4.2-8.3 Nm³/hr)
Flow Range: 0-12 SCFM (0-20 Nm³/hr)
Slit Quantity: 10,155
SSI manufactures disc diffusers with compression molded membranes. Standard materials are EPDM (pictured at right) and fluoroelastomer layered EPDM. Compression molding ensures a diffuser with even specific gravity and uniform tear resistance. The tear resistance of a compression molded part is multidirectional, which is typically not found in injection molded unidirectional parts.
Our manufacturing experience ensure emulsifying fats cannot leech plasticizer and cause shrinkage and increase hardness, nor are our membranes at risk of flexure failure.
Select membrane materials for your diffusers.
The SSI POD design comes pre-assembled and pre-attached on pipe. Most diffusers are supplied in kit form with a lot of work for the contractor. This diffuser is not supplied in parts, rather completely assembled, attached to pipe.
Popular Membranes: PTFE
SSI's PTFE membranes have been proven since 2004 to improve fouling resistance to such an extent that cleanings are in most cases such that cleaning frequency is reduced by a factor of 5 to 10 as compared to standard EPDM membranes from the industry's leading manufacturers.
Learn more about our PTFE membranes.
High Efficiency Disc Diffusers
SSI offers a variety of ultra fine bubble/high efficiency products including flat panel shaped diffusers and modified versions of our standard disc and tube products with low surface tension membranes, small slits, operating at low flux rates and high diffuser densities.
Standard oxygen transfer efficiencies of up to 3.3%/ft (11%/m) are achievable under extreme circumstances, however a more typical and practical value is 2.3 to 2.5%/ft (7.5 to 8.0%/m). When high SOTE’s are combined with low headloss, it is possible to achieve SAE, wire-to-water of in excess of 8 lb/HP-hr (5 kgO2/kWh).
