Inlet Guide Vane (IGV) Dampers for Fan and Blower Airflow Control
Fan and blower inlet airflow rarely responds well to simple on/off throttling. Steel plant blower systems, power plant ID/FD/PA fans, and cement plant kiln and cooler fans all need progressive, repeatable airflow control — without the energy losses of downstream damping or the mechanical strain of poorly synchronized vanes.
An Inlet Guide Vane damper uses a ring of radial blades, mechanically linked to move in unison, to progressively open or close the flow annulus at the fan or blower inlet. Fluidtecq designs, builds and automates IGV dampers as complete packages — vane assembly, linkage, actuator, and control accessories engineered and stroke-tested together before dispatch.
Key Features
- Multi-vane radial construction for progressive, near-linear flow control
- Synchronized linkage ring for uniform blade movement across the full assembly
- Fail-safe actuation as standard — spring-return, configurable fail-open or fail-close per project requirement
- Modulating control as standard, with open/close-only control available where full modulation isn't required
- In-house actuator mounting, linkage setting and travel calibration before dispatch
Available Configurations
- Size range: Up to 3 meters diameter
- Materials: SS 204, SS 316, SS 316L, and MS — selected per media, ambient condition, and corrosion requirement
- Actuation: Pneumatic (standard), electric available on request
- Control: Modulating (normally-close standard) or open/close-only
| Technical Specifications | |
| Parameter | Detail |
| Size range | Up to 3 meters diameter |
| Blade/casing material | SS 204 / SS 316 / SS 316L / MS |
| Actuation | Pneumatic (standard), electric (on request) |
| Fail-safe behavior | Spring-return; fail-open or fail-close configurable |
| Control type | Modulating (normally-close) or open/close |
Automation Accessories
Pneumatic actuator, solenoid valve, limit switch box, air filter regulator, positioner (for modulating duty) — the same automation accessory family used across Fluidtecq's valve automation packages, so plants standardizing on Fluidtecq automation can carry spares and control logic across both valves and dampers.
Typical Applications
- ID fan, FD fan, and PA fan inlet control — power plants
- Blower inlet airflow control — steel plant blower/fan systems
- Kiln and cooler fan control — cement plants
- General process and utility fan/blower systems requiring progressive airflow control
Industries Served
Steel · Power · Cement · General Process Industries
Selection Considerations
Before finalizing an IGV damper, confirm: duct/casing diameter, required flow turndown ratio, actuation torque requirement, ambient and process temperature, duty cycle (continuous modulation vs. periodic open/close), and fail-safe position required for your control philosophy.
FAQs
How is an IGV damper different from a standard butterfly damper? A butterfly damper uses a single blade across the duct; an IGV damper uses multiple radial vanes that open in unison, giving a more progressive and controllable flow characteristic — particularly at large diameters where a single blade becomes structurally and aerodynamically limiting.
Can Fluidtecq supply IGV dampers larger than 24"? Yes. The IGV damper range extends up to 3 meters in diameter, with actuator sizing and linkage design engineered for each diameter and torque requirement.
Is modulating control mandatory? No. Fluidtecq supplies both modulating (proportional) control and simple open/close control, depending on whether the application needs continuous flow trimming or staged isolation.
Related Products
Valve Automation Packages · Pneumatic Actuators · Limit Switch Boxes · Air Filter Regulators
