Gas Tight Dampers
Damper Solutions for Industrial Processes Requiring High Temperature, Low Leakage and Controlled Gas Flow
Gas Tight Dampers are mechanical flow-control devices used in industrial and energy systems to regulate, isolate, divert or completely shut off flue gas, exhaust gas or process gas flow.
Designed for high temperatures, high flow rates and demanding operating conditions, gas tight dampers support process safety and energy management through low leakage rates, optimised pressure loss, robust construction, modulating / on-off operation and an optional seal-air system.
Design up to 600°C
Suitable for flue gas, exhaust gas and process gas lines operating at high temperatures.
Low Leakage Rate
Low leakage is targeted through soft sealing, metal-to-metal sealing or optional seal air.
On-Off / Modulating
On-off or modulating operation can be provided by electric or pneumatic actuators.
What Is a Gas Tight Damper?
A gas tight damper is an industrial damper system used on flue gas or process gas lines to control, isolate, restrict, divert or completely shut off gas flow. The damper blade is positioned within the gas duct and moved to the specified angle by an actuator.
These dampers play a critical role in process control and energy management, especially in waste heat recovery systems, boiler operations, cogeneration / trigeneration plants, process stacks and exhaust gas diversion applications.
Gas Tight Damper Operating Principle
Installation on the Gas Duct
The damper is installed on the flue gas or process gas line using a flanged connection.
Blade Angle Adjustment
An electric or pneumatic actuator controls the angle of the single-blade or multi-blade construction.
Flow Control
Gas flow is regulated, restricted, diverted or fully shut off according to process requirements.
Sealing and Isolation
A low leakage rate is targeted with the sealing system and optional seal air.
Key Technical Features
Can be engineered for design temperatures up to 600°C.
Can be manufactured with a carbon steel or stainless steel body.
Single-blade or multi-blade damper designs can be applied.
Soft sealing, metal-to-metal sealing or a seal-air system.
Electric or pneumatic actuator options.
On-off or modulating operation capability.
Gas Tight Damper Technical Information Table
| Technical Feature | Typical Value / Option | Description |
|---|---|---|
| Product type | Gas tight damper | Used for flow control in flue gas, exhaust gas and process gas lines. |
| Design temperature | Up to 600°C | Suitable for high-temperature industrial gas lines. |
| Body material | Carbon steel or stainless steel | Selected according to gas temperature, chemical composition and corrosion conditions. |
| Blade type | Single-blade / multi-blade | Designed according to flow rate, duct cross-section and control accuracy. |
| Sealing options | Soft sealing / metal-to-metal sealing | Determined according to leakage rate, temperature and process conditions. |
| Actuator type | Electric or pneumatic | Selected according to the automation scenario and site infrastructure. |
| Operating mode | On-off or modulating | Full open / close or proportional flow control can be applied. |
| Configuration | Two-way or three-way damper | Used in bypass, diversion and diverter applications. |
| Seal-air system | Optional | Preferred for applications requiring near-zero or very low leakage. |
| Connection | Flanged connection | Provides ease of installation and maintenance. |
| Additional equipment | Position switch, limit switch, position indicator, manual lever, manhole | Can be added according to monitoring, maintenance and manual-intervention requirements. |
Engineering and Design Criteria
| Design Criterion | Description |
|---|---|
| Gas temperature | Material, sealing and expansion details are determined according to the temperature value. |
| Flow rate and duct cross-section | An aerodynamic design is made for pressure loss and control accuracy. |
| Pressure conditions | The body, blade and shaft structure are sized according to process pressure. |
| Chemical composition | Carbon steel, stainless steel or special material is selected for corrosion risk. |
| Leakage rate | The target leakage level is determined with soft gaskets, metal-to-metal sealing or a seal-air system. |
| Operating scenario | Flow control, isolation, bypass or diverter function is selected according to the project. |
Damper Configurations
Used for open / close, isolation or modulating flow control on the gas line.
Preferred for bypass or diversion applications where one line must close while the other line opens.
Used in processes where gas flow must be controlled between two different lines.
Application Areas
Advantages of Gas Tight Dampers
Application Note
When selecting a gas tight damper, gas temperature, flow rate, duct dimensions, pressure, chemical composition, corrosion risk, required leakage rate, sealing type, actuator selection, operating mode, bypass / diverter need and maintenance access should be evaluated together.
Get Technical Support for Gas Tight Damper Selection
Gas tight dampers should be engineered according to process temperature, gas flow rate, duct cross-section, leakage class, sealing requirements and the automation scenario.
You can request a project-based technical assessment for gas tight damper solutions for boiler, waste heat recovery, cogeneration, process stack, petrochemical and power plant applications.
