Caps are most commonly used in aerobic digesters and equalization tanks where high rate oxygen transfer efficiency is not required, They are manufactured from black Acetyl plastic containing UV protection and membranes are made from the same EPDM compound that SSI uses in fine bubble disc diffusers. Caps have a3/4" MNPT thread. SSI's Cap diffuser is a non-clog design and operates well under intermittent and continuous conditions. A typical piping system utilizing SSI AFC75diffusers is made from PVC, CPVC or Stainless Steel pipe, with Grommets, Drilled and Tapped pipe, or welded¾"FNPT SS bosses to the top center line.
90mm or 110mm(O.D)PVC pipe(3.5mm-6.5mm Wall Thickness)
Model Detail
Relia-Bill
2mm to 4.5mm Wall thick PVC Pipe
φ110
Hole size on pipe(chamfered)
φ32mm
Design air flow range
8 to 17 Sm³/hr
Drawings & Dimensions
Membrane Features
PTFE properties
Resistance to biofouling and chemical precipitation
Creep resistance
Resistance to plasticiser loss
Traditional EPDM membranes have a short life in pulp and paper mills due to fouling, creep (stretching) and plasticiser loss (shrinkage). SSI's PTFE membranes can help your mill run longer, reduce downtime and
improve oxygen transfer efficiency. PTFE membranes are a small investment that can keep your mill running for years before the next membrane replacement or blower failure.
In independent studies, SSI's PTFE membranes have shown less plasticiser migration and slower creep than other materials. Maintenance of the plasticiser in SSI's PTFE membranes allows the membranes to maintain their initial properties, helping to preserve the performance and efficiency of your aeration system.
SSI's patented PTFE membrane is more durable than ordinary EPDM membranes and is becoming the global industry standard.
EPDM is a synthetic rubber product developed according to the customer's usage requirements. Due to its unique compound composition and compression moulding process, the membrane retains its physical properties for long periods of time under minimal water pressure, resists tearing, and retains its shape after years of cyclic operation, producing fine air bubbles. Our EPDM membrane products have been tried and tested in a variety of municipal and industrial wastewater treatment applications with excellent results. However, standard EPDM is not recommended for applications where solvents, grease, or oils are present, as well as high concentrations of metal salts.
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 is 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.
