PRESSURE CONTROL DAMPER
The RICKARD VARIABLE GEOMETRY Pressure Control Damper (PCD) has been designed to control supply air duct pressures accurately. This accuracy is required in Variable Air Volume Variable Geometry systems since VAV diffusers are sized and set to operate at a constant pressure, independent of air flow. Important factors in PCD design are therefore linear airflow response to actuator movement, reliability of air flow and, low noise regeneration throughout the airflow range. Opposed blade dampers and variations on the “butterfly-valve” type are not suited for duct static pressure control as they are not designed with these factors in mind.