Used for maintaining constant air volume in ventilation systems without additional power supply

• Made of galvanized steel sheet, the damper blade is made of the anodized aluminum sheet
• Recommended airflow velocity from 3 to 8 m/s, at pressure difference >50 Pa
• Adjusting the required constant amount is done by turning of working screw on the right side of the cover
• Working temperature : -20...80°C
• Relative humidity: 5...80% rh
• Constant flow: ±10% set value
• Casing airtightness: Class C