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Automatic recirculation valve Introduction

Automatic recirculation valve is a unique design whose performance has been perfected through simulation and joint research and development with the universities of Magdeburg and Darmstadt.

  Operation of Minimum Flow (or ARC) Valves

  Pump and Automatic Recirculation Valve automatically protect centrifugal pumps during low load operation. As the pump's load drops below a preset flow rate, the valve's disc moves towards it's seat and causes the bypass bush to open a bypass flow path. The pump minimum flow rate is thus reached and maintained.

  Automatic Recirculation Valve Applications

  A common application is for pumps which handle hot water for boiler feeding or cooling water plants, where partial evapouration of the water content might otherwise cause the pump to run dry. Even when the flow rate through the main valve to the boiler is completely shut off, a minimum flow is maintained.

  Automatic Recirculation Valve

  Another application is to protect high performance pumps during a start up phase. In this scenario, pipe and fittings are used in parallel with one in stand-by. The pump recirculation valve enables the swap out to occur without damage to the valves.

  Unique design is widely used in the Power, Paper and Pulp Maritime, Refining and Chemical industries

  Advantages of the Automatic Recirculation Valve

  * Unique design

  * Combines both check and bypass features

  * Proprietary Cv calculation system

  * Minimum flow protection

  * No external actuation required

  * 3 Phase Slurry and High pressure variants available

  Automatic Recirculation Valve Sizing

  Depending on the process application, sizes from 1 inch to 24 inch are available as standard. Larger sizes on request.

  Valve Materials

  Pump Automatic Recirculation valve are available in all materials including cast-steel; stainless steel, all nickel based alloys, Titanium, Zirconium and others.

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