Use Of VCD In HVAC Systems

Volume control dampers (or VCDs) are specifically intended for heating, ventilation, and air conditioning systems to regulate the volume, flow, and pressure of air within the ducts. Volume Control Dampers, which can be installed by an HVAC service in Austin, TX, provide equal distribution and flow control of air at high duct pressures and are ideal for a wide range of HVAC applications.

Different Blade Operations

Volume control dampers are available with either parallel or opposing blade action, and each style has distinct features in terms of active type. Parallel blade dampers are built so that all of the blades move in the same direction and are parallel. When the damper functions in its two positions, open or shut, the parallel blade arrangement is employed. Opposed blade dampers are used on dampers that control airflow and are built such that blades close to each other move in different directions.

The location of the dampers inside the air conditioning system is either immovable or fixed. They may be adjusted manually by opening and shutting the volume control dampers’ doors. They also provide access to remove the ashes deposited in the ash-pan and eradicate the clinker.

Function Of VCDs

The volume control damper’s primary functions are as follows –

  • It controls the flow of air within a duct.
  • It aids in the maintenance of the desired temperature. A volume control damper is an important component of an HVAC system that regulates temperature and delivers effective heating and cooling to your building.
  • It keeps the required pressure constant.

Construction And Components Of VCDs

The dampers are developed and built from various frames, blades, axles, bearings, blade linkage, and other elements to fit the damper’s specific use. The damper’s actuator controls the damper’s position depending on signals from the building automation system, thermostats and controllers, pressure switches, and relays. Actuator selection depends on the actuator’s capacity to appropriately open and shut the damper and the amount of torque it can deliver. The following factors usually determine this –

  • The overall size of the damper.
  • Air velocity via the damper.
  • Static pressure exerted on the damper.
  • Damper blade orientation — parallel or opposing

VCDs As Zonal Restraint

A zone restraint (also known as a Volume Control Damper or VCD) is a type of damper that regulates airflow in an HVAC heating or cooling system. People choose the “AC replacements near me” option and get professionals to split HVAC systems into various zones to increase efficiency and occupant comfort. For example, in a house, one heating zone may service the main floor while another serves the upper bedrooms. As a result, heat may be channeled mostly to the main floor during the day and primarily to the bedrooms at night, enabling unoccupied spaces to cool.

Zone dampers are a must and must not be overlooked. For getting them installed, you can look for an AC tune-up near me and just contact us at (512) 759-4247 or send an email at