Belimo B230+LF120 US : 2-Way 1-1/4" Characterized Control Valve (CCV), Cv 19, Stainless Steel Ball and Stem, Spring Return Damper Actuator, 120VAC, 35 in-lb, On/Off Control Input, <40-75 Second Run Time, <25 Second Spring Return, Damper Area up to 8.8 Sq.Ft., 5-Year Warranty