Stack Damper
Stack Damper – Series 1912
High-Temperature Isolation Damper for Stack and Exhaust Applications
The Stack Damper – Series 1912 from SUDE Engineering Private Limited is a robust flow control and isolation solution engineered for reliable operation in high-temperature stack and exhaust systems. Installed at the outlet of stacks or chimneys, this damper regulates or completely isolates flue gas flow, ensuring safe shutdown, reduced heat loss, and enhanced operational and environmental efficiency.
Manufactured to withstand extreme service conditions, this stack damper is suitable for handling hot, corrosive, and particulate-laden exhaust gases commonly encountered in power plants, industrial furnaces, boilers, incinerators, and pollution control systems. It is available in both circular and rectangular configurations, allowing seamless integration into a wide range of stack and duct geometries.
The construction emphasizes structural rigidity and thermal stability, ensuring consistent performance under continuous high-temperature exposure and fluctuating pressure conditions. Precision-engineered blades and sealing arrangements provide effective isolation during system shutdown, preventing unwanted air ingress and minimizing thermal losses. This results in improved system efficiency, reduced fuel consumption, and extended equipment life.
Designed for dependable long-term service, the damper supports manual, electric, or pneumatic actuation, enabling easy integration with automated plant control systems. Its reliable isolation capability enhances plant safety during maintenance and emergency shutdowns while supporting compliance with environmental and emission control requirements.
Widely applied in power generation, cement plants, steel and metallurgical industries, chemical processing units, and HVAC exhaust systems, this stack damper reflects SUDE Engineering Private Limited’s commitment to durable design, thermal performance, and engineering excellence in industrial damper solutions.
Technical Specifications
Parameter
Shapes Available
Circular or rectangular
Size Range
Up to 300 mm to 3500 mm
Flow Media
Flue gases, hot air, or process exhaust
Blade Type
Single blade, multi-blade, or flap type (horizontal/vertical mounting)
Sealing Efficiency
Tight shut-off to zero-leakage (with seal air system)
Sealing Type
Metal-to-metal or pressurized seal air arrangement
Temperature Range
Up to 1000°C or higher with refractory lining
Material of Construction
Carbon steel or stainless steel with insulation
Pressure Rating
0.5 – 1 bar (low differential pressure)
Drive Operations
Pneumatic, electric, or hydraulic actuator
Testing Standards
Leak testing per ISO 5208 / API 598
Design Standards
Custom engineered as per ASME / SMACNA ducting norms
Working Principle:
Open Position
Damper blade(s) remain fully open to allow free exhaust gas flow. Streamlined blade design minimizes pressure drop and turbulence.
Closed Position
The blade rotates or slides to fully seal the flue gas outlet. Seal air may be introduced for achieving zero-leakage isolation.
Actuation Options:
Pneumatic
Fast-acting with fail-safe spring return.
Electric
Motorized actuator for controlled and remote operation.
Hydraulic
High-torque option for large or heavy-duty dampers.
Key Features & Advantages
- Ensures complete isolation of flue gases during shutdown or maintenance
- Minimizes heat loss and prevents cold air ingress when closed
- Custom-built for extreme temperature and corrosive gas conditions
- Heavy-duty construction ensures long operational life
- Optional seal air system ensures environmental compliance
Why Choose Stack Damper – Series 1912?
- Proven High-Temperature Performance: Designed for continuous operation up to 1000°C.
- Zero Leakage Capability: Seal air systems ensure complete isolation and emission control.
- Customized Engineering: Tailored for unique stack configurations and process needs.
- Automation Compatible: Supports pneumatic, electric, and hydraulic actuation systems.
- Quality & Reliability: Each unit undergoes strict functional and pressure testing before dispatch.
SUDE Stack Damper Advantage:
SUDE Engineering Pvt Ltd. Manufactures Stack Dampers with robust designs, high-temperature resistance, and advanced sealing arrangements.
Each damper is precision-fabricated, rigorously tested for performance and leakage, and engineered for reliable operation under continuous duty cycles in power, process, and industrial exhaust systems.
Applications
Boiler and furnace exhaust stacks
Gas turbine exhaust and bypass systems
Flue gas treatment units (ESP, scrubber, bag filter outlet)
Industrial heater and incinerator stacks
Emergency shutdown or isolation systems
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