Exhaust Dampers

Product Specifications

Technical details and manufacturing context for Exhaust Dampers

Definition

Exhaust dampers are critical components within exhaust gas management systems that control the volume, pressure, and direction of exhaust gas flow. They function as adjustable valves or gates installed in exhaust ducts, chimneys, or ventilation systems to optimize system performance, maintain backpressure, prevent backdraft, and ensure safe operation of connected equipment like boilers, furnaces, and industrial ovens. These dampers are typically constructed from materials such as stainless steel, carbon steel, galvanized steel, or aluminum alloys, chosen based on the operating environment and required durability. They are available in nominal diameters ranging from 50 to 600 mm, conforming to ISO 6708 for duct connections. Operating pressure ranges from 1.0 to 1.6 MPa per with a note that Operating temperature spans -20 to 450°C per ISO 10434, with special materials required above 450°C. Leakage rates are classified as Class A to C per ISO 10631, with values between 0.1% and 1.0%. Response time for emergency shut-off is typically 2 to 10 seconds. Actuator torque ranges from 50 to 500 N·m per ISO 5211, matched to damper size and pressure. Control signals are analog 4-20 mA per IEC 60381, with optional position feedback. Supply voltage is 24 V DC ±10% per IEC 60038, with AC versions available. Ingress protection ratings are IP54 to IP65 per IEC 60529, with higher ratings for outdoor use. Body materials range from WCB to CF8M per ASTM A216/A351, and seat materials from PTFE to PPL per ASTM D4020, with PTFE for chemical resistance. Weight varies from 15 to 120 kg depending on size and material. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

Exhaust dampers operate by physically obstructing or opening the exhaust passageway. They typically consist of a blade, vane, or louver mechanism that rotates or slides within a housing. When activated (manually or via actuators), the damper adjusts its position to increase or decrease the cross-sectional area available for gas flow, thereby regulating flow rate and pressure. Some dampers use counterweight or spring mechanisms for automatic operation based on pressure differentials.

Common Materials

Stainless steel, Carbon steel, Galvanized steel, Aluminum alloys

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	50–600 mm	Standard sizes for duct connectionsISO 6708
Operating Pressure	1.0–1.6 MPa
Operating Temperature	-20–450 °C	Above 450°C requires special materialsISO 10434
Leakage Rate	0.1–1.0 %	Class A–C per ISO 10631ISO 10631
Response Time	2–10 s	Faster for emergency shut-off
Actuator Torque	50–500 N·m	Match to damper size and pressureISO 5211
Control Signal	4–20 mA	Analog position feedback optionalIEC 60381
Supply Voltage	24 ±10% V DC	AC versions availableIEC 60038
Ingress Protection	IP54–IP65	Higher IP for outdoor useIEC 60529
Body Material	WCB–CF8M	Carbon steel to stainless steelASTM A216/A351
Seat Material	PTFE–PPL	PTFE for chemical resistanceASTM D4020
Weight	15–120 kg	Depends on size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Damper Blade Part
Primary moving part that regulates gas flow by changing position

Material: Stainless steel
Shaft Part
Connects the blade to the actuator and provides rotational axis

Material: Carbon steel
Seals/Gaskets Part
Prevent gas leakage around the blade edges and shaft penetrations

Material: Silicone rubber or high-temperature fiber
Housing/Frame Part
Structural enclosure that mounts within the exhaust duct

Material: Galvanized steel
Counterweight or Spring Optional
Returns the blade automatically on pressure-operated dampers.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Exhaust Gas Management

View system integration details

Manufacturers of Exhaust Dampers

Manufacturer profiles associated with Exhaust Dampers.

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Frequently Asked Questions

What are the standard sizes for exhaust dampers?

Standard nominal diameters range from 50 to 600 mm, per ISO 6708 for duct connections. Confirm the exact size for your application with the supplier.

What is the maximum operating temperature?

The operating temperature range is -20 to 450°C per ISO 10434. Above 450°C, special materials are required; consult the manufacturer for high-temperature applications.

How is leakage rate classified?

Leakage rates are classified as Class A to C per ISO 10631, with values from 0.1% to 1.0%. Lower classes indicate tighter sealing; verify the class needed for your system.

What control signals are supported?

Control signals are typically analog 4-20 mA per IEC 60381, with optional position feedback. Supply voltage is 24 V DC ±10% per IEC 60038, with AC versions available.

Data Basis

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pressure:	Up to 25 bar (standard), up to 40 bar with reinforced construction
flow rate:	0.5 to 50 m/s gas velocity
temperature:	-40°C to 650°C (standard), up to 1000°C with special alloys
slurry concentration:	Not recommended for slurry applications above 5% solids by volume

Product Specifications

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