Belimo B215B+TFRB24 : 2-Way 1/2" Characterized Control Valve (CCV), Cv 10, Chrome Plated Brass Ball and Nickel Plated Stem, Spring Return Control Valve Actuator, 24VAC/DC, 22 in-lb, On/Off Control Input, <75 Second Run Time, <75 Second Spring Return, 5-Year Warranty