Industrial fans for special applications
Complex applications require innovative solutions. Through the partnership with MZ Aspiratori, we develop specialized fans that go beyond the limits of standard ventilation, ensuring maximum performance and certified safety according to CE directives. Our range covers every specific need: from ATEX explosive risk environments to insulated systems for thermal and acoustic insulation, from compact high-efficiency plug fans to heavy duty solutions for the most demanding conditions.
ATEX fans
In industrial plants where gases, vapors, mists or combustible dusts are present, it is essential to use ventilation systems specifically designed to prevent the risk of explosions. For this reason, we distribute ATEX certified fans produced by MZ Aspiratori, guaranteeing maximum safety in these critical environments.
The fans we supply strictly comply with European regulations: the ATEX Directive 2014/34/EU for equipment intended for explosive atmospheres and the Machinery Directive 2006/42/EC for the safety of machinery. The certification issued by TÜV Nord Cert GmbH of Hannover confirms the quality and reliability of our solutions, providing both the mandatory ATEX certificates and an additional declaration of conformity.
Our fans are designed to operate in zones classified 1/21 (frequent presence of explosive atmosphere) and 2/22 (occasional presence of explosive atmosphere), allowing the safe transport of potentially dangerous materials.
The selection of the appropriate fan depends on the specific risk assessment of the environment, determined by the frequency with which explosive atmospheres can form according to Directive 1999/92/EC.
Zone classification
Areas with gas presence
- ZONE 1: Requires category 2G fans.
- ZONE 2: Requires category 3G or 2G fans.
Areas with dust presence
- ZONE 21: Requires category 2D fans.
- ZONE 22: Requires category 3D or 2D fans.
Construction specifications of ATEX centrifugal fans
- Inspection hatch: For checking for deposits and maintaining clearances.
- Safe coupling: With brass insert on the suction inlet and shim between the nut/impeller on the transmission side.
- Adequate sealing: Based on the type of motor (B3 or B5) and suitable gaskets.
- Protective nets: On the suction and delivery sides.
- Continuously welded casing: For powers over 11 kW (always welded for Category 2GD).
- Suitable motor: Certified for the specific area.
- For transmission: Antistatic belts, casing with brass shims, suitable monoblocks.
- Category 2GD: All 3GD specifications, plus always welded casing and specific certification for Zone 1G/1D.
Construction specifications of ATEX axial fans
- Inspection hatch: To check for deposits and play in the drum.
- Suitable gaskets: For flanges.
- Protective nets: In suction and delivery.
- Suitable motor: Certified for the specific area.
- Impellers: Can be made of aluminum (up to 245°C) or polyamide loaded with glass fibers (up to 110°C, with dimensional limits).
Insulated fans
Insulated fans are the technical answer to challenges where high temperatures and noise control require specialized solutions. These systems ensure operational safety, energy efficiency and regulatory compliance even in the most critical conditions. Insulation can be achieved in two distinct ways, each designed for specific operational needs.
The first way involves insulating the hub only, a solution dedicated to the transport of fluids with temperatures above 150°C. This configuration creates an effective thermal barrier that isolates the internal high-temperature area from the external area at room temperature, protecting critical mechanical components and ensuring operator safety. For extreme applications that require resistance to temperatures in the 200-300°C range, we develop customized solutions studied on a case-by-case basis by our technical office. It is important to specify that this insulation cannot be applied to direct-coupled fans equipped with size 63 motors.
The second option involves the complete insulation of the casing, made with semi-rigid panels in biosoluble rock wool, a material compliant with Directive 97/69/EC and obtained from the fusion of natural rocks. This solution is particularly suitable for operating temperatures above 300°C and offers two advantages: it drastically reduces the surface temperature of the fan, improving the safety of the working environment, and significantly reduces noise propagation, contributing to acoustic comfort and regulatory compliance. We offer different thickness options: standard 60mm, with the possibility of 80mm, 100mm and 120mm to meet specific thermal and acoustic insulation needs.
Hot Gas fans
Conveying fluids at temperatures above 60°C presents a complex technical challenge for industrial ventilation systems. These extreme thermal environments require equipment specifically designed to withstand intense heat and ensure reliable performance over time.
We offer specialized industrial fans for hot gases, developed to operate effectively in these critical conditions. The distinguishing feature of these fans is the integration of a dedicated cooling system: an auxiliary fan installed on the impeller hub that ensures continuous heat dissipation.
This cooling system keeps critical mechanical components within safe temperature parameters, preventing overheating that could compromise performance or cause premature failure. The cooling fan operates automatically during the operation of the main fan, ensuring constant thermal protection.
Special fans in two or more parts
For large fans, maintenance is often a complex challenge in terms of costs and downtime. The most effective technical solution is the modular design with a self-supporting casing and extraction from the transmission side.
This special configuration allows the impeller assembly to be completely extracted without having to disconnect the fan from the process plant. The operational advantage is significant: during ordinary or extraordinary maintenance interventions, it is not necessary to dismantle the piping or completely stop the system, drastically reducing downtime and associated costs.
The self-supporting casing ensures independent structural stability, while the lateral extraction system allows quick and safe access to internal components requiring maintenance, such as bearings, impeller and transmission shaft.
Plug fan
Plug fans are compact units characterized by the absence of the traditional scroll, specifically designed for integration in systems with space limitations where it is not possible to install a complete standard industrial fan.
These solutions are typically used in industrial ovens, air distribution plenums, paint booths and air handling units, where compactness and ease of integration are essential requirements. Despite their small size, they use the same impellers as standard fans, ensuring reliability and consolidated performance.
It is important to consider that the final performance depends on the characteristics of the system in which they are integrated, since the absence of the scroll modifies the aerodynamic behavior compared to traditional fans.
They are available in different construction configurations: executions 4 and 5 for direct-coupled models and execution 9 for transmission-driven ones. For high-temperature applications, they can be supplied in the hot gas version with auxiliary cooling fan, with or without insulated panel, allowing safe operation with operating temperatures of up to 300°C in the impeller area.
Heavy Duty fans
For industrial applications that require operation at very high pressures or in particularly severe operating conditions, ventilation solutions with structural characteristics superior to conventional standards are required.
Heavy duty fans are designed and built with increased sheet thicknesses and additional structural reinforcements to ensure mechanical resistance and durability over time even in the most demanding conditions. This reinforced construction allows them to deal with intense mechanical stresses, high vibrations and working pressures exceeding the limits of standard fans.
This design represents the ideal solution for industrial sectors such as metallurgy, cement plants, petrochemical plants and mining processes, where the reliability of the equipment is critical for production continuity and operational safety.
