EGGER North America (Aeration Flow Control Valve)

EGGER North America is the North American representative of Swiss manufacturer Emile Egger & Cie SA, specializing in precision flow control valves for wastewater aeration systems. The company's flagship product is the IRIS diaphragm control valve, a concentric iris-style valve that varies its aperture continuously from fully closed to 100 percent open while maintaining a central flow axis. The IRIS valve achieves positioning accuracy with less than 1 percent deviation and operates with zero hysteresis, providing highly repeatable flow regulation for dissolved oxygen control strategies. Available in sizes from DN 25 to DN 400 (1 through 16 inches), with pressure ratings up to 10 bar (150 psi) and temperatures up to 220 degrees C (428 F), the IRIS valve supports DO-based aeration control, airflow-based control, pressure-based control, Most Open Valve automation, and Ammonia-Based Aeration Control (ABAC). Its full-bore design when open minimizes pressure drop, yielding up to 15 percent blower energy savings compared to conventional butterfly or globe valves. Major North American installations include Baltimore Back River WWTP (174 valves), Brightwater WWTP in King County WA, North Toronto WWTP, and Petersburg KY WWTP. The company partners with engineering firms including Brown and Caldwell, Black and Veatch, Bowen Engineering, and AECOM.