ICA ATEX GAS and H₂ – explosion-proof corrosion-resistant centrifugal fans for corrosive gas and hydrogen atmospheres ≤7100 m³/h

ICA ATEX GAS and H₂ – explosion-proof corrosion-resistant centrifugal fans

DYNAIR / MAICO ITALIA ICA ATEX industrial centrifugal fans are manufactured with antistatic polypropylene casings and impellers for conveying corrosive, non-abrasive fumes and vapours in potentially explosive gas atmospheres. The fans are classified as ATEX equipment category II 3G for Zone 2 and the series delivers airflow up to 7100 m³/h. The manufacturer also includes ICA in its gas and hydrogen ATEX range; however, suitability for hydrogen must be documented for the specific complete fan assembly with an IIB+H2 or IIC classification.

Main features

• Explosion-protected ATEX construction for flammable gas and vapour atmospheres, Zone 2, equipment category II 3G.
• Designed for conveying corrosive, non-abrasive fumes and vapours.
• Conveyed medium temperature from -20 °C to +40 °C.
• Volute casing made of antistatic polypropylene in accordance with EN IEC 60079-0, clause 26.13.
• High-performance polypropylene impeller with forward-curved blades.
• Inlet connection and motor support supplied as standard.
• Direct-drive construction.
• Three-phase asynchronous ATEX motor with minimum catalogue protection classification EEx d IIB T3.
• Motor protection class IP55, insulation class F.
• Continuous duty S1.
• Motor mounting arrangement B3 or B5.
• Motor construction according to the applicable IEC 60034, IEC 60072 and IEC 60079 standards.
• Motor speed regulation is not permitted.
• Standard casing discharge orientation LG0°.
• Eight discharge orientations in 45° increments.
• Five casing sizes: 120, 160, 200, 250 and 350.
• Six catalogue models with motor power from 0.12 to 3.00 kW.

ATEX classification and hydrogen applications

Standard ICA ATEX equipment is classified as II 3G for Zone 2, with minimum catalogue motor classification EEx d IIB T3. Hydrogen belongs to gas group IIC. Operation in hydrogen atmospheres requires documentation establishing suitability of the specific fan assembly and its electrical equipment for IIC or the hydrogen-specific IIB+H2 classification. Standard IIB classification alone does not establish suitability for hydrogen.

Fan casing orientations

Standard discharge orientation LG0°. Eight positions are available: LG0°, LG45°, LG90°, LG135°, LG180°, LG225°, LG270° and LG315°.

Optional accessories

• RD – square-to-round discharge adaptor.
• ICA ATEX 120 – RD 5RD1015.
• ICA ATEX 160 – RD 5RD1021.
• ICA ATEX 200 – RD 5RD1025.
• ICA ATEX 250 – RD 5RD1027.
• ICA ATEX 350 – RD 5RD1026 or 5RD1028.

Accessories are not included in the Type Examination Certificate. Their suitability for the specific ATEX installation must be assessed separately.

ICA ATEX – technical catalogue (PDF)

ICA ATEX GAS and H₂ – dimensions

All dimensions are in millimetres (mm); indicative weights are in kilograms (kg). Dimension symbols correspond to the manufacturer's drawing.

Main casing dimensions

Connection and mounting dimensions

Fan dimensional drawing

ICA ATEX – original dimensional drawing (PDF, page 3)

RD adaptor dimensions

ICA ATEX GAS and H₂ – technical information

ICA ATEX – model specifications

Lp is the sound pressure level under free-field conditions at the point of maximum efficiency, measured at a distance of 1.5 m according to EN ISO 13349 measurement category D.

Air performance is determined according to EN ISO 5801 / AMCA 210 at an air density of 1.2 kg/m³.

Actual airflow and static pressure of each model are selected using the manufacturer's aerodynamic performance curves.

ICA ATEX – technical specifications and performance curves (PDF)

ICA ATEX GAS and H₂ – installation and operating instructions

Application and operating environment

ICA ATEX fans are intended to convey corrosive, non-abrasive fumes and vapours in industrial ventilation systems where potentially explosive gas atmospheres may occur. Before installation, verify that the specific fan's ATEX equipment category II 3G and its documentation are appropriate for the Zone 2 installation conditions.

Conveyed medium

• Permissible conveyed medium temperature from -20 °C to +40 °C.
• The medium must be non-abrasive.
• Verify the chemical resistance of polypropylene to the substances being conveyed.
• Hydrogen applications require confirmed IIB+H2 or IIC suitability for the specific complete fan assembly and its electrical equipment.

Mechanical installation

• Mount the fan on a stable supporting structure suitable for its weight and operating loads.
• Avoid damage to or deformation of the polypropylene casing during installation.
• Ductwork must not transfer excessive mechanical loads to the casing or its connections.
• Provide sufficient access for maintenance.
• Check that the impeller rotates freely before commissioning.

Casing orientation

The standard discharge orientation is LG0°. Eight positions are available, from LG0° to LG315°, in 45° increments.

Electrical connection

• Electrical connections must be performed by qualified personnel.
• Power supply: 400 V / 3-phase / 50 Hz.
• Follow the motor rating plate and the applicable ATEX technical documentation.
• Ensure protective earthing and electrical continuity of the antistatic construction in accordance with manufacturer requirements.
• Motor speed control is not provided.

Commissioning

• Check the impeller rotation direction.
• Inspect the mounting, duct connections and mechanical components.
• Measure the motor current and compare it with the rated value.
• Check vibration, noise and motor temperature.
• Operate within the selected model's aerodynamic performance characteristics.

Maintenance

Regularly inspect the casing, impeller, motor, fasteners and electrical connections. Remove deposits and check for chemical damage to the polypropylene components. Before maintenance, disconnect the power supply, prevent accidental restarting and observe the safety procedures applicable to potentially explosive atmospheres.

ICA ATEX – manufacturer's technical catalogue (PDF)