Product Overview

The Boiler Centrifugal Forced Induced Draft Fan is an industrial centrifugal fan designed for boiler ventilation, combustion air supply, flue gas extraction and draft control.

Depending on the system configuration, the GY5-51 can be used as either a Forced Draft (FD) Fan or an Induced Draft (ID) Fan. It is suitable for industrial boilers, steam boilers, biomass boilers, waste heat boilers, heating systems and boiler flue gas treatment systems.

EMS provides customized fan solutions based on airflow, pressure, temperature, dust concentration, system resistance, material requirements and installation conditions.

Main Applications

Industrial Boiler Forced Draft
Industrial Boiler Induced Draft
Boiler Combustion Air Supply
Boiler Flue Gas Exhaust
Steam Boiler Ventilation
Biomass Boiler Systems
Waste Heat Boiler Systems
Boiler Dust Collection
Flue Gas Desulfurization
Denitrification Systems
District Heating
Thermal Energy Systems
CHP Plants
Industrial Heating Systems

G5-51 Boiler Centrifugal Forced Draft Fan

Typical Technical Parameters

Parameter	Typical Range
Product Type	Centrifugal Forced & Induced Draft Fan
Airflow	3,000–200,000 m³/h
Total Pressure	1,000–6,000 Pa
Motor Power	5.5–500 kW
Fan Speed	730–2,900 rpm
Gas Temperature	Up to 250°C typical
Drive Type	Direct / Belt / Coupling
Fan Type	Single-Suction Centrifugal Fan
Impeller Material	Carbon Steel / Wear-Resistant Steel
Casing Material	Carbon Steel / Customized
Bearing	Heavy-Duty Industrial Bearing
Installation	Horizontal / Customized
Frequency	50 Hz / 60 Hz
Operation	Continuous Duty

Note: These are typical engineering reference ranges, not fixed specifications for every GY5-51 configuration. Final selection should be based on the actual operating point and system conditions.

Working Principle

Forced Draft Application

Ambient Air → GY5-51 FD Fan → Air Duct → Boiler Furnace → Combustion

In FD service, the fan supplies combustion air to the boiler furnace and provides the required airflow and pressure for stable combustion.

Induced Draft Application

Boiler → Dust Collector → Flue Gas Treatment → GY5-51 ID Fan → Chimney

In ID service, the fan extracts flue gas from the boiler system and overcomes the pressure losses of the dust collector, flue gas treatment equipment, ducts and chimney.

Key Features

Forced and Induced Draft Capability

The GY5-51 series can be configured for both FD and ID boiler applications, depending on the system design.

Stable Centrifugal Performance

The centrifugal impeller provides reliable airflow and pressure performance for continuous industrial operation.

Suitable for High-Resistance Systems

The fan can be selected for boiler systems incorporating dust collectors, FGD, DeNOx equipment and long flue-gas ducts.

Multiple Drive Options

Depending on the required speed, power and installation arrangement, EMS can provide:

Direct Drive

Belt Drive

Coupling Drive

Wear-Resistant Configuration

For dusty ID applications, wear-resistant impellers, liners and reinforced structures can be provided according to the dust characteristics.

High-Temperature Configuration

For elevated-temperature flue gas, EMS can configure suitable bearings, cooling arrangements, high-temperature materials and sealing solutions.

FD Fan vs. ID Fan

Item	Forced Draft Fan	Induced Draft Fan
Function	Supplies combustion air	Extracts flue gas
Location	Upstream of furnace	Downstream of boiler
Medium	Air	Flue gas
Dust Concentration	Usually low	Usually higher
Temperature	Usually lower	Usually higher
Main Objective	Stable combustion air supply	Boiler negative pressure and exhaust
Typical Application	Combustion system	Flue gas system

Typical Installation Locations

The GY5-51 can be used in:

Industrial Boiler Plants
Steam Boiler Systems
Biomass Boiler Plants
Waste Heat Boiler Plants
District Heating Plants
CHP Plants
Industrial Heating Systems
Boiler Dust Collection Systems
Flue Gas Treatment Systems
Thermal Energy Facilities

Fan Selection Requirements

For accurate GY5-51 selection, customers should provide:

Boiler Capacity
Fuel Type
Required Airflow
Required Pressure
Gas Temperature
Gas Density
Dust Concentration
Flue Gas Composition
Total System Resistance
Duct Size and Length
Dust Collector Pressure Loss
FGD / DeNOx Pressure Loss
Installation Altitude
Motor Voltage and Frequency
Operating Hours
Material Requirements
Drive Type
Noise Requirements

Boiler capacity alone is not sufficient for accurate fan selection. The actual fan duty point should be determined from combustion requirements, flue gas volume and total system resistance.