SCHROEDAHL’s new self-modulating TDL automatic recirculation valves are now available in more than 35% lighter cast material. These all-in-one pump protection solutions are designed to keep pumping systems in process, firefighting, refinery, power and chemical applications modulating and running smoothly, without cavitation or overheating, the company points out. The valves offer maximum flexibility in bypass trim sizes for pumping systems from 10” to 20” nominal pipe size. SCHROEDAHL.