Schroedahl ARV-Series
The Automatic Recirculation Valve (ARV) protects centrifugal pumps against overheating and cavitation problems by automatically maintaining a minimum flow when the system flow is in low load condition. The application itself is usually a closed loop application and consists of a suction and recirculation line from the tank and back to the tank. Typically the ARV is directly mounted on the pump discharge flange.
The valve system comprises a high quality check valve in the main line and a special control device for the minimum flow recirculation (the bypass control system). The general valve functioning is related to the process flow quantity – all SCHROEDAHL ARVs are flow sensitive.