Ventech CAV Damper VCAV-A

The constant air volume valve is a mechanically braked structure developed for air volume control in constant air volume systems, suitable for both supply and exhaust air. Each constant air volume valve is set to a reference air volume before leaving the factory and has undergone airflow performance testing. The required air volume can be conveniently set through an external dial without the need for any tools. The operation of the constant air volume valve does not require power supply; it relies on a flexible vane that maintains the air volume constant at the set value within the entire pressure difference range under the action of aerodynamic forces.

The flow of air generates power. This force is amplified by an automatic inflatable airbag inside the constant air volume valve, acting on the vane to move it in the closing direction. The airbag also has a cushioning and shock - absorbing effect. At the same time, a mechanical device composed of a spring blade and a cam drives the vane in the opposite direction, thus ensuring that the air volume remains constant within a minimal error when the air duct pressure changes.

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