Butterfly Damper S150

Robust Flue Gas Damper for High Temperatures and Demanding Environments

The Swedamper S150 is a heavy-duty butterfly damper designed for regulating or shutting off gas flows in industrial flue gas and air 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 S150 is suitable for both clean and dust-laden gases, making it a reliable solution for safe and efficient flow control in applications with strict environmental requirements.

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
Suitable for inaccessible or confined spaces
Custom-designed to meet your specific requirements

Combustion plants
Flue gas systems in boiler plants and district heating plants
Metallurgical smelters
Process ventilation in energy and industrial applications

Example of use: Swedamper S150 is used in combustion plants to regulate flue gas flow, helping to optimize the combustion process and reduce emissions. In smelters, it helps control airflow, improving energy efficiency.

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 or threaded components inside the duct that could cause operational issues over time.

Stainless steel stuffing box on the drive side with ball bearing as standard.
Material selection for the housing, blade, and flanges depends on operating conditions such as temperature, corrosive environment, and abrasion. Different materials can be combined, for example using different alloys for the housing and blade.
Blade sealing options include steel-to-steel, PTFE, fiberglass, silicone, and other materials depending on process requirements.
Flanges can be manufactured according to customer specifications or in accordance with our standards or other recognized industry standards.
Custom-designed to meet your specific requirements, with a wide range of industrial alloys available.

See also our Disc Damper S400 for applications requiring 100% tight shut-off.

Description

Butterfly Damper S150 – Compact Design for Demanding Industrial Applications

The Butterfly Damper S150 is a robust, high-performance industrial damper developed for environments where flow control, operational reliability, and temperature resistance are critical. Its compact design minimizes external protrusion, making it particularly suitable for inaccessible areas and installations where space is limited.

The S150 is used in applications ranging from advanced flue gas systems to demanding process industries and is designed to handle both clean gases and gases with high dust loads without compromising precision or service life. Thanks to its heavy-duty construction and flexible design, the damper is particularly well suited for applications where high temperatures, corrosive environments, or continuous operation place extreme demands on the equipment.

The Butterfly Damper S150 is commonly installed in combustion plants, district heating plants, combined heat and power (CHP) plants, waste-to-energy systems, smelters, process industries, steel plants, boiler plants, biomass facilities, chemical plants, food processing facilities, and marine installations where reliable control of flue gases, airflow, and process air is essential.

The damper is used to regulate the volume of flue gas passing through ducts, chimneys, or process lines, contributing to improved temperature control, more stable combustion, and reduced emissions. Optimized airflow also improves energy efficiency and helps meet modern environmental requirements.

Heavy-Duty Construction for Demanding Operating Environments

The Butterfly Damper S150 is designed for long service life and minimal maintenance. It features a through-shaft design with a fully welded blade reinforced by blade ribs to withstand high mechanical loads, vibration, and pressure fluctuations.

There are no bolted or threaded components in the free flow area of the duct—an important advantage in industrial applications where loose components could cause operational problems or safety risks.

The damper is supplied as standard with:

Stainless steel stuffing box on the drive side
Ball bearing and fixed plain bearing for stable, low-friction operation even under demanding conditions
Flexible material combinations for the housing, blade, and flanges to suit temperature, corrosion, and abrasion requirements
Various blade sealing options, including steel-to-steel, PTFE, fiberglass, silicone, and other materials depending on process requirements

Materials for Extreme Temperatures and Environments

The Butterfly Damper S150 can be manufactured in virtually all commonly used industrial alloys. Available materials include carbon steel (e.g. EN 1.0038), stainless steel (EN 1.4301), acid-resistant stainless steel (EN 1.4404), and heat-resistant alloys such as 253MA, 254SMO, and Alloy 800HT.

Depending on material selection, maximum operating temperatures can reach up to 1100°C. Sealing options are available for environments ranging from chemically aggressive conditions to extreme heat, including ceramic fiber/Inconel solutions for temperatures up to +1250°C.

This makes the S150 particularly suitable for:

High-temperature processes
Flue gas cleaning systems
Aggressive chemical environments
Process air in the steel and metals industries
High-humidity and steam environments
Processes involving oxidizing gases

Customization for Different Industries and Applications

One of the key strengths of the Butterfly Damper S150 is its ability to be adapted to specific process requirements. Available special configurations include:

M (Marine) – for ships, offshore installations, and other marine applications
D / DT (Double / Double Tandem) – purge-air solutions for applications requiring increased tightness
HT (High Temperature) – for processes exceeding 1000°C
R (Refractory Lined) – internal refractory lining for extreme heat and wear
T (T-Duct) – two dampers integrated into a T-duct configuration

Flanges can be manufactured according to customer specifications or recognized industry standards.

The S150 is available in sizes from DN100 to DN3000*, making it suitable for both small and large process lines.

* Larger sizes available upon request.

Typical Industrial Applications

The Butterfly Damper S150 is particularly suitable for:

Process industries
Energy production, including CHP and district heating
Steel plants and smelters
Waste-to-energy plants
Petrochemical industry
Pulp and paper industry
Food processing
Marine and offshore systems
Heavy industrial ventilation systems
Environmental and emission control systems

Typical functions include:

Flue gas flow regulation
Opening and shut-off of process ducts
Bypass applications
Pressure and temperature control
Air distribution in furnaces
Process shut-off functions

Operational Reliability and Easy Maintenance

The stable construction helps minimize wear, vibration, and leakage over time. With no loose components in the duct, the risk of unplanned downtime or components entering critical parts of the process is reduced.

By selecting the appropriate sealing and construction materials, the damper can be configured for long service intervals even in environments involving:

Abrasive particles
High dust loads
Moisture, condensation, or steam
Chemical exposure
Temperature fluctuations

Combined with its compact installation design, this makes the Butterfly Damper S150 a reliable solution for heavy industry, continuous operation, and installations where available space is limited.

Summary

The Butterfly Damper S150 is a high-quality industrial damper combining heavy-duty construction, compact design, flexible configuration, and material options for extreme operating environments.

It is engineered and manufactured according to customer-specific requirements and is suitable for both traditional heavy industry and modern energy-efficient and environmentally demanding processes.

Its robust construction, long service life, compact installation dimensions, and adaptability make the S150 an excellent solution for applications requiring reliable flow control, high temperature resistance, and minimum external protrusion.

Obs: Jag har konsekvent ändrat de S200-referenser som fanns kvar i den svenska texten till S150. Det är värt att kontrollera att specialutförandena D/DT, HT, R och T, samt temperaturerna 1100°C/1250°C, verkligen gäller S150 och inte följde med från S200-texten innan ni publicerar.