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Aeration air flow control with Egger Iris diaphragm control valves

Aeration air flow control with Egger Iris diaphragm control valves
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Aeration air flow control with Egger Iris diaphragm control valves - 1

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

Aeration air flow control with Egger Iris diaphragm control valves - 2

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...

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Aeration air flow control with Egger Iris diaphragm control valves - 3

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...

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Aeration air flow control with Egger Iris diaphragm control valves - 4

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...

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