Check the listing for details. Belimo TFB24 Spring-Return Damper Actuator 22 In-lb, 24V. Condition: New, Made in United States. Listed at 114.98 USD. The Belimo TFB24 Spring-Return Damper Actuator is a high-quality HVAC accessory designed for controlling air flow in heating and cooling systems. With a power source of corded electric and a voltage of 24V, this direct mount actuator offers a strong spring return force of 22 in-lb. Made of durable plastic material, this product ensures reliable performance and long-lasting operation for your HVAC system. Belimo is a trusted brand known for producing innovative and efficient HVAC products, making this damper actuator a great choice for your industrial or commercial heating and cooling needs.