What is direct coupled actuator?

What is direct coupled actuator?

DDA and DDC Series Direct Coupled Actuators are non-spring return actuators that are perfect for positioning of dampers and valves in HVAC systems. DDA actuators are designed to accept floating control signals and come in a variety of power supplies. DDC units feature a 0 to 10 VDC feedback signal of damper position.

What is a damper actuator?

Damper actuators are powered devices that are used to operate a damper and adjust the flow of air and smoke. There are two basic types: electric and pneumatic. General damper actuators and specialized fire and smoke damper actuators are also available.

How do I choose an actuator for a damper?

First, find the square footage of your damper. Check if the damper section is longer than 96″. If it is, then it must have two total actuators on the shaft – one on either side of the damper. This eliminates any deflection or binding that may happen when operating a damper of that length.

What is a duct actuator?

A typical HVAC system delivers climate control via multiple zones by using an automated zone damper or duct damper. Actuators in HVAC systems control the dampers. By utilizing a low voltage signal, the actuator places the damper at any point between fully open and fully closed.

Are dampers bad for HVAC?

Bottom line: You probably shouldn’t close your air supply vents. Excessive static pressure inside an HVAC system is never a good thing. Closing too many air supply dampers could put you in the static pressure “danger zone.”

How many types of dampers are there in HVAC?

There are two common types of HVAC dampers: manual and automatic. Each system brings unique benefits to HVAC applications.

Is an actuator and damper the same?

Dampers are the final control devices for almost all airflow in HVAC systems. Actuators are the interface between the control system and the mechanical system and are critical to accurate control.

How does a duct damper work?

HVAC dampers work by being situated closer to the mouth of the distribution pipe and will push or hold air from that point as needed. The pressure in the pipe will then redistribute the airflow to whatever zone requires regulating at that time.

What are two different types of actuators?

Actuators can create two main types of motion: linear and rotary.

  • Linear Actuators.
  • Rotary Actuators.
  • Hydraulic Actuators.
  • Pneumatic Actuators.
  • Electric Actuators.
  • Thermal and Magnetic Actuators.
  • Mechanical Actuators.
  • Supercoiled Polymer Actuators.