Fluid power company Schroedahl has announced that its new, self-modulating TDL Automatic Recirculation Valves (ARVs) in 10 and 12 NPS are currently available with high bypass flow, providing flexibility in bypass trim sizes for pumping systems.

The all-in-one pump protection solutions keep pumping systems in process, firefighting, refinery, power and chemical applications running without experiencing cavitation, vibration or overheating, according to the company.

Without minimum flow, a pump can experience damage, which causes downtime and expensive repairs, yet control valves for recirculation demand uninterrupted control of equipment, a flow measurement device, a control unit and an energy supply. Unlike control valve packages, the Schroedahl TDL Automatic Recirculation Valves operate without a separate power supply or a control system and they begin to immediately protect once installed.

The TDL Automatic Recirculation Valves blend a main line check valve with a self-actuated integrated bypass control system, which ensures minimum flow rate and protects pumps against overheating and cavitation. The systems offer stability with less vibration and fewer coupling or gear problems, leading to reduced downtime and reduced maintenance costs. TDL ARVs’ modulation bypass function also means savings for operators with reduced energy consumption for frequent partial load operation.

Similarly, the bypass check valve prevents reverse pump flow, and enables the installation of parallel pumps. With extremely low valve hysteresis, TDL ARVs encourage consistent pump performance.

These valves are designed and built with high bypass trims size flexibility. TDL ARVs’ high bypass flow offers maximum flexibility in bypass trim sizes for pumping systems with 10 in or 12 in nominal pipe size (NPS). The valves are available in EN/DIN and ASTM materials.

For more information about SCHROEDAHL Automatic Recirculation Valves, visit Circor.