There are three types of Venturi airflow control valves：

Constant air volume valve, capable of providing stable airflow;

A bistable valve that can provide two different air flow rates, namely maximum and minimum flow rates; Variable air volume valve can control air flow in a closed-loop manner by responding to commands below 1 second and providing flow feedback signals.

The Venturi airflow control valve combines a mechanical pressure independent regulator with a high-speed airflow controller, extending airflow control to the highest level. Through aerodynamic design, the valve has silent working performance.