Iris® diaphragm control valve Energy saving valve for the precise and economical control at low loss of pressure of liquids and gases that can be either clean or contain particles. Advantages Energy-saving flow control Due to its special design with six centrally closing segments, Iris® diaphragm control valves enable a highly energy efficient flow control with low pressure losses. Applications ·· Air for aeration in wastewater treatment plant ·· Gases ·· Municipal and industrial wastewater ·· Slurries and viscous materials ·· Paper pulp and fibrous suspensions ·· Pellets with a particle size over 0,5 mm ·· Sugar suspensions ·· Drinking water Features ·· Highly precise control of the flow rate through concentric Iris® diaphragms (similar to a camera diaphragm) ·· Energy-saving control valve due to its free centric passage ·· Maintenance free Facts & Figures Nominal dimensions: DN 25 – 400 mm 1 – 16" Pressure: up to 10 bar 150 psi Temperature: up to 220°C 428°F Materials: ·· Casing: GG, 1.4409, 1.4588 ·· Segments: Bz hard chrome plated, 1.4404, 1.4529 ·· Special materials on request High flow capacity Cv (Kv) Its flow-optimized design, as well as the completely retracted segments in the casing when fully open provide a very high flow capacity Cv (Kv). Manual operation Turbulence-less flow control Due to centric flow guidance without fixed components or restricting sections, Iris® diaphragm control valves regulate with stability and accurately with little turbulence. Regulation accuracy The unique design allows for an economic and stable regulation with a reliable, hysteresis-free control characteristic over the whole range. Electric operation Pneumatic operation Robust construction The robust construction is designed for control applications with high frequency of adjustment and is also suitable for the most demanding fluids. Industrial series The industrial series BSH for higher system and differential pressures is available from DN 65 up to DN 300. It fulfills the requirements of the Technical Guidelines on Air Quality Control (TA-Luft) and can

Applications Iris® diaphragm control valves are characterized by flow which is always centered. The passage can be varied continuously, similar to a camera aperture. Thus, constant flow rates may be reproduced in any position. The ideal control characteristic according to DIN EN 60534 and its low pressure losses make the Iris® diaphragm control valve a reference to an energy-saving valve in many industries. Here is a small selection of typical applications. Aeration in a wastewater treatment plant Used to regulate the aeration, this valve has been proven thousands of times at wastewater treatment...