Belimo B222+LF24-3-S US : 2-Way 1" Characterized Control Valve (CCV), Cv 7.4, Stainless Steel Ball and Stem, Spring Return Damper Actuator, 24VAC/DC, 35 in-lb, On/Off, Floating Point Control Input,, <150 Second Run Time, <25 Second Spring Return, SPDT, 5-Year Warranty