Flue Gas Butterfly Valve

High Temperature & Corrosion Resistant Industrial Valve

48-inch Flue Gas Butterfly Valve with Double Flanged End

Overview

The flue gas butterfly valve is far more than a simple on/off device. It is a highly engineered piece of equipment, meticulously designed with specific materials and features to provide reliable, long-lasting service in one of industry's most punishing environments. Its ability to regulate or isolate hot, corrosive, and abrasive flue gases makes it an indispensable asset for ensuring operational efficiency, safety, and environmental compliance in a wide range of industrial sectors.

Features and Benefits

Shield^TM Flue Gas Butterfly valve, also called Exhaust Air and Gas Butterfly Valve, is designed to adjust volumes of hot air and flue gas on various appliances and flue gas lines; and on the basis of the free flow principle no deflection of the flow. It is suitable for regulating flow rates for modulating or stage controlled combustion processes.

To withstand the harsh environment of flue gas, these valves are built with specific features that distinguish them from standard butterfly valves.

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Robust, Corrosion-Resistant Materials

The valve body and disc are typically constructed from stainless steel (e.g., 304, 316) or higher-grade alloys to resist corrosion from acidic condensates and chemical contaminants in the gas stream.

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High Performance Sealing

Low leakage rates ensure high product quality and system efficiency.

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Large Capacity Design

Suitable for high burner capacities due to large nominal diameters.

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Easy Installation

Simple installation thanks to clamping between standard flanges.

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Low Maintenance

Designed for minimal maintenance requirements and long service intervals.

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Extended Service Life

Robust design ensures a long service life even in demanding conditions.

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Easy Maintenance

One piece body with concentric disc design makes seat replacement extremely easy.

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Versatile Applications

For ventilation systems, gas exhaust systems, combustion systems, etc.

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High Temperature Capability

Design temperatures up to 900°C for extreme thermal conditions.

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Flexible Control Options

For On/Off or Modulating Control Applications with various actuation options.

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Multiple Actuation Options

Available with manual operator, or actuator (pneumatic or electric).

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Compact Design

Compact and lightweight design makes installation easier and requires less support structure.

Applications and Industries

The flue gas butterfly valve is specifically designed for demanding gas-handling duties across various industries. Its primary role is to isolate or regulate the flow of flue gas within a ducting system.

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Power Generation

In coal, gas, or biomass-fired power plants, these valves are essential for directing exhaust gases through the boiler island and into the pollution control systems.

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Flue Gas Desulfurization (FGD) Systems

Critical for isolating scrubbers and controlling gas flow through different treatment paths, ensuring the removal of sulfur dioxide (SO₂).

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Chemical and Petrochemical Plants

Used in fired heaters and process furnaces to manage the exhaust from combustion processes.

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Waste Incineration

These valves handle the extremely hot and highly corrosive flue gases produced by burning municipal or industrial waste.

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General Industrial Boilers

Any large-scale heating system relying on a boiler will use these valves for maintenance isolation and operational control.

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HVAC Systems

For large commercial and industrial heating, ventilation, and air conditioning systems requiring precise gas flow control.