What Are Exproof Fans?

Exproof Fans are specialised ventilation units whose electric motor and mechanical components are selected for explosive-atmosphere conditions.

These fans are used to convey, dilute or extract potentially flammable gases, vapours or dust in a controlled manner. Their purpose is to support both process safety and personnel safety.

How Do Exproof Fans Work?

The fan casing and motor configuration are selected for conditions in which explosive atmospheres may occur. The electric motor, terminal box, impeller, casing and auxiliary equipment are assessed according to the risk classification.

The system draws contaminated or hazardous air from the extraction line and conveys it to a safe discharge point. In duct applications the fan is integrated into the duct run, while cabinet versions can be located in an enclosure that provides sound insulation and easy servicing.

Applications

• Chemical production facilities
• Paint booths and paint-preparation areas
• Solvent storage and transfer areas
• Battery-charging rooms
• Refineries and petrochemical facilities
• Gas and vapour extraction systems
• Process areas with ATEX zone classification
• Dust, fume, vapour and gas extraction lines
• Industrial exhaust and ventilation systems
• Technical rooms with combustible or flammable-atmosphere risks

System Advantages

• Provides safe air transfer in areas at risk of explosive atmospheres.
• Can be engineered to suit the ATEX zone classification.
• Available as cabinet or duct fan configurations.
• Suitable for process air, solvent vapours, chemical gases and contaminated-air extraction.
• Can be integrated with industrial ventilation systems.
• Correct selection supports energy efficiency and operational safety.
• Designs can be configured for maintenance access and easy servicing.

Fan Types

• Exproof cabinet fan: A fan solution in which the fan and motor assembly are installed inside an enclosure, providing sound control and convenient service access.
• Exproof duct fan: A compact fan type integrated into the ventilation duct run for practical installation.
• Exproof axial fan: Suitable for areas requiring high airflow and low pressure.
• Exproof centrifugal fan: Preferred for process and exhaust lines requiring higher pressure.
• Exproof roof fan: Suitable where contaminated air must be safely discharged through the roof.

Technical Selection Criteria

• ATEX zone classification and explosive-atmosphere group
• Characteristics of gases, vapours, solvents or dust
• Required airflow
• Total pressure loss
• Fan type and installation method
• Motor power rating and protection class
• Operating temperature and ambient conditions
• Duct connection dimensions
• Sound level and vibration control
• Maintenance access, service clearance and site layout

Exproof Fan Selection Criteria

When selecting Exproof Fans, airflow and pressure alone are not sufficient. The ATEX zone classification, explosion characteristics of the conveyed medium, motor type, casing material, impeller, duct line, electrical connection and automation infrastructure must be assessed together.

Incorrect fan selection can lead to insufficient ventilation, high energy consumption, process-safety risks, motor failure, vibration, noise problems and inadequate management of explosive-atmosphere risks.

Cabinet Fan Applications

Cabinet fans are systems in which the fan and motor assembly are protected inside an enclosure. This construction provides advantages in service access, sound control, vibration reduction and mechanical protection.

Exproof cabinet fans are particularly suitable for process exhaust, chemical-vapour extraction, solvent extraction and industrial ventilation lines requiring high safety.

Duct Fan Applications

Duct fans are compact fan solutions installed directly on ventilation ductwork. They are preferred for their space-saving construction and easy integration into the duct line.

Exproof duct fan systems can be used in low- and medium-pressure exhaust lines, chemical-vapour extraction systems, battery rooms and process-ventilation applications.

ATEX and Safety Assessment

For Exproof fan selection, the ATEX zone classification, ambient group, temperature class and equipment category must be correctly identified. The fan system must be assessed in accordance with the risk analysis of its operating environment.

The electric motor, terminal box, casing material, impeller and control equipment must be selected for site conditions. Grounding, vibration control, maintenance access and automation safety scenarios should also be included in the project where needed.

Airtes Exproof Cabinet and Duct Fan Solutions

Airtes provides project-based technical selection and application support for Exproof Fans used in chemical plants, paint lines, battery rooms, solvent areas, refineries, petrochemical facilities and process-ventilation applications.

System evaluation considers the ATEX zone classification, airflow, pressure loss, motor power, fan type, duct connection, sound level, vibration control and site installation conditions together. This creates a safe and efficient fan solution suited to the project.

Why Airtes?

• Fan selection and technical evaluation according to the ATEX risk classification
• Project support for cabinet and duct fan applications
• Engineering approach based on airflow, pressure, motor power and duct connections
• Solutions for chemical, paint, solvent, battery-room and process areas
• Field experience in industrial ventilation and exhaust systems
• Safe, efficient and long-life system design

Frequently Asked Questions

What are Exproof Fans?

Exproof Fans are specialised fan systems used to provide safe air transfer in areas where explosive gases, vapours or dust may occur.

Where are Exproof Cabinet and Duct Fans used?

They can be used in chemical plants, paint booths, solvent areas, battery rooms, refineries, petrochemical facilities and process-ventilation systems.

What is the difference between a cabinet fan and a duct fan?

A cabinet fan places the fan and motor assembly inside an enclosure. A duct fan is a compact fan solution connected directly to the duct line.

How are Exproof Fans selected?

Selection should consider the ATEX zone classification, airflow, pressure loss, characteristics of the conveyed gas or vapour, motor type, casing material and site installation conditions.

Contact Airtes for Exproof Fans Suited to Your Project

Exproof Cabinet and Duct Fans should not be selected before properly analysing your facility’s ATEX zone classification, airflow, pressure loss, gas or vapour characteristics, motor protection class, fan type, duct connection and site installation conditions. The Airtes technical team provides professional support for the right solution.

Contact us for detailed information, site assessment and a project-based quotation.