Double Louver Bypass Damper

Double louver bypass damper is designed for boiler flue gas bypass system. Two layers of louver blades with air sealing cavity, compressed air purging to guarantee low leakage. Mainly used for SCR bypass, air preheater bypass of thermal power plant.

The Double-Louver Bypass Damper is specifically designed for boiler flue gas bypass systems. Featuring double-layer louver blades and an air-sealed chamber, it achieves low leakage through compressed air purging and is commonly used in SCR bypasses and air preheater bypasses at thermal power plants.

Applicable Medium: Boiler flue gas (dust-containing)

Operating Temperature: ≤420°C

Common Materials: Q235B, Q355B; blades/seals available in 16Mn or SS304

Drive Type: Electric / Pneumatic (most commonly electric or pneumatic)

Seal Rating: Low leakage (designed specifically for bypass applications)

Standards: ASME B31.1, GB/T 10868, ISO 13611

Key Selection Parameters

1. Cross-sectional dimensions (width × height); 2. Design pressure differential; 3. Flue gas temperature; 4. Dust concentration; 5. Sealing gas supply pressure; 6. Actuation time requirements