The Grundfos ALPHA1 26-99 is an energy-efficient circulator fitted with a high-efficiency permanent magnet motor (ECM) and integrated frequency converter. The 0-10V analog input for speed control, and an alarm output signal allows for easy boiler and building management integration. A magnetite resistant design, robust ceramic shaft and stainless steel bearing plate ensure that the ALPHA1 26-99 reliably delivers the optimal system flow at the lowest possible energy consumption, Grundos explains. Capable of replacing more than 40 pump models, the ALPHA circulator range has the highest torque rating and most powerful start feature in its class, the company adds. Grundfos.