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The diffuser is equipped with premium quality membrane materials that are engineered by the EDI Membrane Technologies division. EDI's proprietary membrane materials are engineered for superior product life. Multiple membrane perforations are available to optimize the performance of the diffuser for maximum operating efficiency, air handling capacity, or operating pressure. An integral triple-check valve feature prevents the backflow of liquid into the diffuser and piping. The diffuser assembly is constructed of glass-fiber-reinforced polypropylene for maximum performance. This material option offers greater mechanical and temperature capabilities than conventional PVC or CPVC products. Fine bubble diffuser systems are a key component in controlling operational economics of a wastewater treatment plant. EDI's fine bubble diffuser platforms offer maximum performance and application flexibility for system optimization This fine pore, flexible membrane diffuser is capable of providing a high level of oxygen transfer efficiency with maximum operating flexibility. Specifically perforated for high volumetric air handling capacity and head-loss efficiency, the units are configured with a premium quality EPDM rubber membrane sleeve. For industrial and non-standard domestic applications, alternate membrane materials, including urethane, silicone, and other specialty polymers, are available. Alternate perforation patterns are available for energy-sensitive applications or where maximum oxygen transfer efficiency is desired. Membranes used on the FlexAir T-Series units are engineered by the EDI Membrane Technologies division. The FlexAir T-Series diffuser unit may be operated over a wide range of airflows and requires minimum maintenance for long-term performance. The external triple-check valve system minimizes the intrusion of water and solids into the diffuser unit and air supply piping under normal operation conditions.