We are driven by a desire to make the tried-and-tested increasingly better. Thanks to systematic further development, Egger is proud to launch a completely redesigned and technically revised Iris® diaphragm control valve onto the market; we name the new model generation “IBS”. The new IBS will be presented to a wide audience for the first time at this year’s IFAT in Munich in autumn.

The new IBS

The modern industrial design and the compact structure with shorter installation lengths are immediately visible. It is advantageous for a plant operator to know the position in which a control valve is located. As a result of this, the visual position indicator has been completely revised and is clearly visible from three sides even from a long distance; this is in addition to the electronic feedback of the variable speed drive position to the SCADA system.

As an all-rounder, the new IBS can be used in a number of industrial applications; its gas-tight design without spindle feedthrough opens up many new possible applications for regulating chemicals and industrial gases. The gate valve is also prepared for monitoring systems and can be pressurised and equipped with gas or liquid flushing. Leak tightness monitoring and flushing systems can be connected ((or added)) without changing the design.

Its robust design and self-cleaning segments also make the valve a reliable regulator for raw sewage or sludge. Iris® diaphragm control valves are therefore used to control raw sewage, process water, primary and aerated sludge, and also for the task of loading centrifuges with digesting sludge.

The three buffer liquid and flushing connections of the new IBS are offset by 90° and can also be used for drainage and emptying condensate, which is a major advantage for plants that are shut down periodically.

The self-locking spindle nut design of the IBS enables maintenance-free and cost-extensive operation, thus simplifying the use of the control valve in inaccessible locations. An additional advantage for the operator is the ability to replace the drive support or parts thereof without having to remove the Iris® valve from the pipe line.

Precise and repeatable quantity control with Iris® diaphragm control valves, the benchmark for over 60 years

Over the past few decades, the Iris® diaphragm control valve has proved its worth in hundreds of wastewater treatment plants, where it is used primarily as a flow-control valve to ensure economical input of air into the aeration basins. In 1958, the Iris® diaphragm valve was developed by the company’s founder, Emile Egger, and launched on the market, where it was used primarily for paper pulp control in paper factories. At the beginning of the 1980s, Egger introduced an updated version. Iris® diaphragm control valves have been used mainly in aeration basins in wastewater treatment plants ever since. Thanks to its unique design, air quantities can be regulated precisely and reproducibly. This enables the operation of stable biological processes and the implementation of, and precise adherence to, extremely low oxygen input values. This in turn results in high energy efficiency and the high stability of the entire activated sludge process.

For further information, please go to the chapter Iris -Diaphragm Control Valve on our Egger website.