electrical air damper Controlling cool air flow in the refrigerating systems of refrigerators, freezers,display cases and so on Driven by high-powered synchronous motors,low noise, self-locking, piping structure, unique and patented design enabling greater output torque; outer covering and operation cycles can be selected if neededElectrical performancevoltage for use12V±1V DCresistance300±30Ω/ ...