Product Overview

The Industrial Boiler Forced Induced Draft Fan is a centrifugal industrial fan designed for boiler ventilation, combustion air supply, and flue gas extraction applications.

Depending on the boiler system configuration, the GY6-41 can be engineered as a Forced Draft Fan (FD Fan) for combustion air supply or an Induced Draft Fan (ID Fan) for boiler flue gas extraction.

EMS provides customized GY6-41 boiler fans based on boiler capacity, fuel type, airflow or flue gas volume, system resistance, gas temperature, dust concentration, and downstream environmental protection equipment.

Main Applications

The GY6-41 is suitable for:

Industrial Boiler Ventilation
Boiler Forced Draft Systems
Boiler Induced Draft Systems
Steam Boilers
Hot Water Boilers
Industrial Heating Systems
Thermal Energy Systems
Boiler Combustion Air Supply
Boiler Flue Gas Exhaust
Dust Collection Systems
Flue Gas Treatment Systems
Biomass Boiler Systems
Waste Heat Boiler Systems
CHP Systems

boiler-induced-draft-fan

Typical Technical Parameters

Parameter	Typical Range
Product Type	Industrial Boiler Draft Fan
Fan Type	Centrifugal Fan
Application	Forced Draft / Induced Draft
Airflow	3,000–150,000 m³/h
Total Pressure	1,000–6,000 Pa
Motor Power	5.5–315 kW
Fan Speed	730–2,900 rpm
Gas Temperature	Typically up to 250°C
Drive Type	Direct / Belt / Coupling
Impeller Type	Centrifugal
Casing Material	Carbon Steel / Customized
Impeller Material	Carbon Steel / Wear-Resistant Steel
Motor	Industrial Motor
Installation	Horizontal / Customized
Duty	Continuous Operation
Application	Boiler Air Supply / Flue Gas Exhaust

The above values are typical engineering reference ranges and are not fixed specifications for every GY6-41 configuration. Final airflow, pressure, speed, motor power, temperature rating, and materials should be selected according to the actual boiler system.

Working Principle

The GY6-41 uses a centrifugal impeller to accelerate and transport air or flue gas. The rotating impeller converts mechanical energy into airflow and pressure suitable for the boiler ventilation system.

Forced Draft Configuration

For combustion air supply:

Ambient Air → GY6-41 FD Fan → Air Duct → Boiler Furnace → Combustion

The fan supplies combustion air while overcoming resistance from air ducts, dampers, air preheaters, and other upstream equipment.

Induced Draft Configuration

For flue gas extraction:

Boiler → Dust Collector → Flue Gas Treatment → GY6-41 ID Fan → Chimney

The fan extracts boiler flue gas and overcomes resistance from dust collectors, desulfurization systems, denitrification systems, ducts, dampers, and chimneys.

Key Features

FD and ID Applications

The GY6-41 platform can be configured for either forced draft or induced draft duties according to the actual boiler design.

Stable Centrifugal Performance

The centrifugal configuration provides the pressure capability required for boiler air supply and flue gas systems with significant system resistance.

Multiple Drive Configurations

Direct drive, belt drive, or coupling drive can be selected according to airflow, speed, motor power, and installation requirements.

Wear-Resistant Options

For dusty flue gas applications, wear-resistant impellers and protective configurations can be provided according to dust concentration and particle characteristics.

High-Temperature Configuration

For high-temperature air or flue gas, appropriate bearings, cooling arrangements, sealing systems, and heat-resistant materials can be selected.

Continuous Industrial Operation

The fan can be equipped with industrial-grade motors, bearings, shafts, and drive components for continuous boiler operation.

FD Fan vs. ID Fan

Item	Forced Draft Fan	Induced Draft Fan
Main Function	Supply Combustion Air	Extract Flue Gas
Installation Position	Upstream of Boiler	Downstream of Boiler
Medium	Fresh / Combustion Air	Boiler Flue Gas
Main Purpose	Support Combustion	Maintain Furnace Draft
Dust Load	Usually Low	Usually Higher
Temperature	Normally Lower	Normally Higher
Typical Equipment	Air Duct / Air Preheater	Dust Collector / FGD / Chimney

Whether a specific GY6-41 configuration is suitable for FD or ID duty should be confirmed based on the actual operating medium, temperature, pressure, dust conditions, and material requirements.