Variable Inlet Vane (VIV)
A variable inlet damper, also known as a variable inlet vane (VIV), is a key feature in AirPro Fans and Blowers for industrial airflow control.
Reduces Power Consumption
When airflow is throttled back using a VIV, the fan’s required power decreases more significantly than when using outlet dampers. This makes VIVs especially valuable in applications where the system frequently operates below maximum capacity.
Modulates Airflow
VIV dampers attach directly to the fan’s inlet and use adjustable blades to control the amount of air entering the fan. This allows precise regulation of flow (volume) and pressure in the system, which is essential when variable process needs exist.
Boosts Efficiency
The blades “pre-spin” incoming air in the same direction as the fan impeller. This pre-rotation makes the fan run more efficiently because it reduces the amount of work the motor must do, especially at partial loads. As a result, less brake horsepower is required, translating to real energy savings and lower operating costs.
Maintains System Stability
By modulating air volume and pressure from the inlet side, VIVs help reduce the risk of fan instability or surge, ensuring smoother operation across a range of conditions.
Flexible Automation and Control
Variable inlet vane dampers can be controlled manually or automatically (electric, pneumatic, or hydraulic actuation) for finely-tuned, responsive system management.
Cost-Effective for Modulation
VIV dampers are particularly advantageous in systems requiring modulation during operation or that run at reduced capacity for extended periods, providing ongoing savings over time.