Butterfly Dampers
Precision Engineered Flow Control Solutions
Butterfly dampers are crucial components in the regulation and control of air, gas, or particulate flow within ductwork and process systems. Named from the unique “butterfly” shaped disk that pivots within a circular enclosure to allow, restrict, or shut off flow. Unlike other damper types, butterfly dampers offer swift operation, low pressure drop, and a compact design, making them indispensable in both large and small-scale industrial environments.
Butterfly dampers modulate flow by rotating the disk, which is positioned by an actuator. This versatility allows for fine control—ranging from full closure to wide-open positions—suited to the demands of complex industrial processes. Butterfly dampers are made from a range of materials, such as stainless steel, carbon steel, or specialized nickel alloys, ensuring durablity with high temperatures, corrosive environments, or abrasive particulates.
The engineering and robust construction of industrial butterfly dampers make them a preferred choice wherever precision airflow management is required, ensuring safety, process optimization, and environmental compliance across a broad spectrum of modern industries.
Butterfly Damper Fit:
- Attached or linked to piping/duct flanges or directly to duct.
- Flange connections may be alignment bolted and seal welded into the duct, or provided with bolt and gasket type connections.
- Butterfly dampers typically require between 8”-12” of duct space for installation.
Butterfly Damper Form:
- Butterfly dampers are used for duct isolation and flow control.
Butterfly Damper Function:
- Open/close applications where less than 99.5% isolation is acceptable
- Flow control/modulation
Industrial Applications
In power generation, they serve an essential role in controlling flue gases and ventilation within boilers and exhaust systems. Chemical and petrochemical plants rely on these dampers to manage toxic or volatile gas flows, contributing to both process efficiency and safety. Cement and mining industries employ butterfly dampers in dust collection and air handling systems, where reliability under harsh conditions is paramount. Additionally, food and beverage processors use them in sanitation-sensitive air control applications, and HVAC systems across commercial and institutional buildings benefit from their energy-efficient operation.
Features
- Multiple linkage and sealing arrangements for both flow control and isolation, with 100% isolation options available.
- Many different actuator options to fit customer’s operating requirements.
Applications
- Typically used for isolation only.
- Typically used for isolation up to 99.5%
- 100% isolation can be achieved using a supplied seal air system.
Operating Range
- 0-50 psig depending on size
- -100 to 2000°F
- Sizes from 12” > 10’
- Horizontal or vertical
Materials
- Carbon Steel
- Stainless Steel
- Nickel Alloys
Engineered Damper Solutions
Comprehensive Services – One Stop Shop
Engineering l Manufacturing l Commissioning l Servicing
For over 100 years, SF Pathway’s Wahlco Metroflex has built our reputation on surpassing our customer’s needs. Our team is our strength and we provide all damper services ranging from the Engineering and design, through manufacture and commissioning. We also support industry throughout the lifecycle of facilities by retaining expert technicians and equipment to respond as needed.
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We take on severe services and challenges, at any plant and in any part of the world and welcome the opportunity to provide you with a quote.