Control Damper Technical Information
What is air performance/pressure drop? Why is it important?
Air Performance is the damper’s ability to pass air through open blades with minimal resistance.
HVAC equipment in your ductwork will cause a certain amount of static pressure. Static pressure will resist the dynamic pressure of airflow as it passes through the control damper, which creates a pressure differential that lowers the airflow’s dynamic pressure. This difference in pressure is commonly known as “Pressure Drop”.
A lower pressure drop means less restricted air flow and ,ore efficient air performance across the HVAC system.
What is air leakage? Why is it important?
Air leakage is the damper’s ability to close tightly to limit the amount of air passing through the damper.
In other words, Air Leakage is that wisp of air that get through the closed blade damper.
There will always be some air leakage, since no damper is airtight, but too much leakage can cause trouble. If left unchecked, this leakage can hinder performance and cause excess strain on your HVAC system.
What is an actuator and how is it different than a motor?
Damper actuators are either an electric or pneumatic device for positioning of dampers in HVAC systems. Actuators for dampers are supplied in multiple operation for example two-position non-spring return, two-position spring return, proportional (modulating) spring or non-spring return.
What is the difference between airfoil blades vs v-groove blades?
An airfoil blade is shaped like an airplane wing and provides excellent strength and control.
Triple V-Groove blades are flat-steel reinforced with V-shaped grooves for strength and are ideally suited for HVAC systems of 2,000 fpm and less air low.
What is the difference between an airfoil blade and aerodynamic shaped blades?
An airfoil blade is shaped like an airplane wing and provides excellent strength and control.