Belimo B210+TFRB24-3 : 2-Way 1/2" Characterized Control Valve (CCV), Cv 1.2, Stainless Steel Ball and Stem, Spring Return Control Valve Actuator, 24VAC/DC, 22 in-lb, On/Off, Floating Point Control Input, <95 Second Run Time, <25 Second Spring Return, 5-Year Warranty