The KVR CAV damper is a fire-retardant plastic mechanical device designed to maintain a constant air volume in ventilation systems without the need for power supply. It regulates airflow between 15 and 700 m³/h under a pressure range of 50 to 200 Pa. The damper is easy to adjust within its flow range. Built with M1-class fireproof plastic, stainless steel calibrated spring, and rubber air-tight sealing, it ensures safety and durability. Ideal for commercial and residential ventilation ducts.