The Swedamper S200 is a heavy-duty butterfly damper designed for regulating or shutting off gas flows in industrial flue gas and air handling systems.
The damper is used in demanding industrial applications such as combustion furnaces, district heating plants, and smelters—environments where high temperatures, particulate loads, and operational reliability place strict demands on equipment performance.
The S200 is suitable for both clean and dust-laden gases, making it a reliable solution when strict environmental requirements must be met through safe and efficient flow control.
High temperature resistance
Handles high levels of particulate matter in the process media
Flexible sealing options
Easy to install and maintain
Long service life and low operating costs
Custom-designed to meet your specific requirements
Combustion plants
Flue gas systems in boiler houses and district heating plants
Metallurgical smelters
Process ventilation systems in energy and industrial facilities
Example of use:
The Swedamper S200 is used in combustion plants to regulate flue gas flow, optimizing the combustion process and reducing emissions. In smelters, it helps control airflow, improving energy efficiency and overall process stability.
Heavy-duty and stable construction. Through-shaft design where the blade is fully welded along the entire shaft and reinforced with blade ribs. No bolted components inside the duct that could cause operational issues over time.
Stuffing boxes on both sides in stainless steel with double ball bearings as standard.
Material selection for housing, blade, and flanges depends on operating conditions such as temperature, corrosive environment, or abrasion. Materials can be combined, for example using different alloys for housing and blade.
Blade sealing options include steel-to-steel, PTFE, fiberglass, silicone, and other materials.
Flanges are manufactured according to your specifications or in accordance with our standards or other recognized industry standards.
We design according to your requirements and manufacture in virtually all industrial alloys.
See also our Disc Damper S400 for applications requiring 100% tight shut-off.
The Butterfly Damper S200 is a robust, high-performance industrial damper developed for environments where flow control, operational reliability, and temperature resistance are critical. It is used in everything from advanced flue gas systems to demanding process industries and is engineered to handle both clean gases and gases with high dust content—without compromising precision or service life.
Thanks to its heavy-duty construction and flexible design, the S200 is particularly well suited for applications involving high temperatures, corrosive environments, or continuous operation where equipment is exposed to extreme mechanical and thermal stress.
The Butterfly Damper S200 is commonly installed in:
Combustion plants
District heating facilities
Combined heat and power (CHP) plants
Waste-to-energy systems
Smelters and metal processing plants
Process industries
Steel industry
Boiler systems
Biomass plants
Chemical industry
Food processing industry
Marine and offshore installations
The damper regulates the volume of flue gases passing through ducts, chimneys, or process pipelines. By optimizing airflow, it contributes to improved temperature control, more stable combustion, reduced emissions, and enhanced energy efficiency—supporting compliance with modern environmental regulations.
The Butterfly Damper S200 is designed for long service life and minimal maintenance.
It features:
A through-shaft design with a fully welded blade
Reinforced blade ribs for high mechanical loads
No bolted or threaded components in the free flow area
This design eliminates the risk of loose components entering the process stream—an important safety and operational advantage in heavy industrial environments.
Stuffing boxes on both sides in stainless material
Double ball bearings for stable and low-friction operation
Customizable materials for housing, blade, and flanges
Multiple blade sealing options depending on process requirements
Available sealing materials include steel/steel, PTFE, fiberglass, silicone, and other high-performance alternatives.
The S200 Butterfly Damper can be manufactured in nearly all commonly used industrial alloys.
Material options include:
Carbon steel (e.g., EN 1.0038)
Stainless steel (EN 1.4301)
Acid-resistant stainless steel (EN 1.4404)
Heat-resistant alloys such as 253MA, 254SMO, Alloy 800HT
Additional special alloys upon request
Maximum operating temperatures can reach up to 1100°C, depending on selected material.
Sealing solutions are available for aggressive chemical environments and extreme heat, including ceramic fiber/Inconel combinations rated up to +1250°C.
This makes the S200 ideal for:
High-temperature processes
Flue gas cleaning systems
Aggressive chemical environments
Steel and metal industry process air
High humidity or steam environments
Oxidizing gases and abrasive particle exposure
One of the main strengths of the Butterfly Damper S200 is its adaptability.
Available special configurations include:
M (Marine) – for ships, offshore, and marine environments
D / DT (Double / Double Tandem) – purge air systems for enhanced tightness
HT (High Temperature) – for processes exceeding 1000°C
R (Refractory Lined) – internal refractory lining for extreme heat and wear
T (T-duct configuration) – two dampers integrated into a T-duct solution
Flanges can be manufactured according to customer specifications or recognized industrial standards.
Size range: DN100–DN3000, making the S200 suitable for both small process lines and very large industrial duct systems.
The Butterfly Damper S200 is frequently used for:
Flue gas flow regulation
Shut-off and isolation of process ducts
Bypass solutions
Pressure and temperature control
Air distribution in furnaces
Emergency shut-off functions
The reinforced design minimizes wear, vibration, and leakage over time. The absence of loose components in the duct reduces downtime and operational risks.
With correct material and sealing selection, the damper is suitable for extended service intervals even in environments exposed to:
Abrasive particles
High dust concentrations
Moisture, condensation, or steam
Chemical corrosion
Rapid temperature fluctuations
This makes the S200 one of the most reliable butterfly dampers for heavy industry and continuous operation.
The Butterfly Damper S200 is a high-quality industrial damper that combines heavy-duty construction, flexible design, and advanced material selection for extreme environments.
Developed and manufactured according to customer-specific requirements, it performs equally well in traditional heavy industry and in modern energy-efficient, environmentally sensitive processes.
With its robustness, long service life, and adaptability, the S200 is an optimal choice for companies requiring maximum operational reliability, high temperature resistance, and precise flow control.
| Temperature | < 1100°C |
|---|---|
| Size | DN100 – 3000 |
| Anpassningar | -M (Marine), -D (Double), -DT (Double Tandem), -HT (High Temp), -R (Refractory / Lined), -T (Tee) |
SWEDAMPER-S200-DN150-1shaft
SWEDAMPER-S200-DN200-1shaft
SWEDAMPER-S200-DN250-1shaft
SWEDAMPER-S200-DN300-1shaft
SWEDAMPER-S200-DN350-1shaft
SWEDAMPER-S200-DN400-1shaft
SWEDAMPER-S200-DN450-1shaft
SWEDAMPER-S200-DN500-1shaft
SWEDAMPER-S200-DN550-1shaft
SWEDAMPER-S200-DN600-1shaft
SWEDAMPER-S200-DN650-1shaft
SWEDAMPER-S200-DN700-1shaft
SWEDAMPER-S200-DN750-1shaft
SWEDAMPER-S200-DN800-1shaft
SWEDAMPER-S200-DN850-1shaft
SWEDAMPER-S200-DN900-1shaft
SWEDAMPER-S200-DN950-1shaft
SWEDAMPER-S200-DN1000-1shaft
SWEDAMPER-S200-DN1100-1shaft
SWEDAMPER-S200-DN1200-1shaft
SWEDAMPER-S200-DN1300-1shaft
SWEDAMPER-S200-DN1400-1shaft
SWEDAMPER-S200-DN1500-1shaft
SWEDAMPER-S200-DN1600-1shaft
SWEDAMPER-S200-DN1700-1shaft
SWEDAMPER-S200-DN1800-1shaft
SWEDAMPER-S200-DN1900-1shaft
SWEDAMPER-S200-DN2000-1shaft
When selecting a damper for industrial flue gas and process systems, both the Butterfly Damper S200 and the Disc Damper S400 are robust solutions — but they are developed for different functions and operating conditions.
Below are the key differences:
Used for regulating and controlling the volume of flue gases or air.
Ideal for combustion plants, district heating facilities, smelters, and duct systems where flow needs to be throttled, adjusted, and optimized.
Suitable for both low and very high temperatures (up to approx. 1100°C depending on material)
Designed for continuous process operation
Typically operates in partially open positions
In short: Choose S200 when you need precise flow control.
Used to completely open or shut off flow, for example in bypass systems, chimneys, filters, or air handling units.
Delivers 100% geometric tight shut-off thanks to its double-offset shaft and three-point linkage
Process pressure assists in maintaining tight closure
Excellent for applications with strict environmental and emission control requirements
In short: Choose S400 when you need complete isolation and maximum tightness.
Through-shaft design
Blade welded across the entire shaft
Reinforced with blade ribs
No bolted components in the gas flow
Available in numerous alloys for extreme heat and high dust content
→ Designed to withstand wear, vibration, and high temperatures during regulating operation.
S400 – Double-Offset Disc Damper
Double-offset shaft design
Disc suspended in a three-point linkage
Flat or dished blade depending on size
100% uniform surface pressure against the seal
No purge air required
Stuffing boxes on both sides, double ball bearings in S235 as standard
→ Designed for tight shut-off in demanding industrial environments.
Up to 1100°C depending on material
Suitable for clean gases and high dust loads
Highly flexible material selection (carbon steel, stainless steel, acid-resistant grades, 253MA, 254SMO, Alloy 800HT, etc.)
→ Ideal for steel plants, smelters, boilers, and extreme high-temperature processes.
Up to 750°C according to datasheet
Suitable for clean gases and moderate dust content
Sealing options include PTFE, fiberglass, silicone for various chemical environments
→ Ideal for duct isolation, gas cleaning systems, filter bypass solutions, and heavy industrial ventilation systems.
Not designed for 100% tight shut-off
Primarily a control component
Handles very high temperatures
100% geometric tightness
Process pressure enhances sealing performance
Can often replace dual-damper + purge air systems
→ Lower investment cost
→ Reduced operating cost
| Requirement | Choose S200 | Choose S400 |
|---|---|---|
| Flow regulation | ✔ | ✘ |
| Full shut-off / On-Off | ✘ | ✔ |
| Very high temperatures | ✔ up to 1100°C | ✘ up to 750°C |
| High tightness | ✘ | ✔ 100% geometric sealing |
| Chimney / filter bypass | ✘ | ✔ |
| Filter isolation / air handling | ✘ | ✔ |
| Smelters, district heating, extreme heat | ✔ | ✘ |
| Replace dual dampers / purge air systems | ✘ | ✔ |
