Iris® Process Control Valve Energy-saving regulation of activated air

Improved process control with a potential 20 % blower energy reduction Creation and delivery of dissolved oxygen used in the activated sludge process consumes up to 60% of the energy in the wastewater treatment plant. Finally, Biological processes can be optimized, Blower discharge pressures reduced, DO set-points lowered, and energy saved as a result of the Iris® valve’s superior «linear» flow characteristics providing stable, accurate, repeatable, reliable air flow regulation, and process control. Over the past 40 years, the Egger Iris® flow control valve has been success fully used in hundreds...

Dimensioning of an Iris® diaphragm control valve according to DIN EN 60534 High quality regulation range Stroke Valve [%] Calculation of the throughput for gases with temperature correction Metric (K,) US Units (Cv) ∆p · p2 Q = 514 · K · q = 1.360 · Y · C N Volume throughput of gases in a normal state (0°C, 1013 mbar) Nm / h Volumetric flow rate (20°C, 14.69 Pisa) Density of gases in a normal state Pressure differential Differential pressure Absolute pressure downstream of the valve Upstream absolute static pressure Absolute temperature upstream of the valve Upstream absolute temperature Expansion...

Thanks to systematic further development, with the third generation Egger is introducing a modern and compact version of the tried-andtested Egger Iris® valve. Maintenance free A re-designed spindle nut assembly is manufactured using a self- lubricating thermoplastic material which permits maintenance free operation. No longer is regular lubrication of the threaded spindles required. Circular opening and closing The six segments of the Iris® flow control valve are arranged to form a circular opening similar to a camera aperture. The segments can be infinitely adjusted. Free flow cross-section...