High-performance fan Pirox

high-temperaturelow-noiseIP55

Overview
The PIROX series by SDT Air is a reaction-type centrifugal fan designed for hot gas recirculation in industrial thermal processes requiring continuous, reliable and safe operation under severe temperature conditions. Configured as a plug fan with belt-driven transmission and a thermally insulated casing, the unit is engineered for high performance, reduced vibrations and noise, and long service life in continuous industrial processes.

Typical applications

• Furnaces
• Boilers
• Paint booths
• Dryers
• Insulated thermal chambers
• Burners
• Melting furnaces
• Temperature control systems

Thermal Insulation

• High-density rock wool insulation
• Density: 145 kg/m³
• Standard wall thickness: 150 mm

Reaction Turbine

• Self-cleaning impeller
• High-efficiency reinforced backward-curved impeller (reaction type)
• Manufactured from carbon rolled steel
• Dynamically balanced to minimize noise and vibrations

Main Features

• High-performance impeller
• Self-cleaning design
• Dynamically balanced
• Black heat-resistant coating on impeller
• Heavy-duty sealed monoblock construction

Drive System

• Drive assembly with safety guards in accordance with ISO 13857
• High-efficiency, maintenance-free belt

Thermal Performance

• Gas temperature range for continuous operation: -40 °C to 350 °C
• Optional versions up to 450 °C available on request
• Maximum ambient operating temperature for the motor: 60 °C

Standard Finish

• Carbon steel construction
• Heat-resistant coating
• C3 corrosion protection finish
• Impeller finished with black heat-resistant paint

Motorization and Efficiency

• TEFC motors: standard IEC squirrel-cage asynchronous motors
• IP55 protection
• Class F electrical insulation
• B3 foot-mounted motor on base frame

Standard Voltages

• 230/400 V 50 Hz for three-phase motors up to 4 kW
• 400/690 V 50 Hz for higher power ratings

ErP Compliance

• IE3 (Premium Efficiency): standard from 0.75 kW to 55 kW
• IE4 (Super Premium Efficiency): from 75 kW and above
• IE2 (High Efficiency): for power ratings below 0.75 kW

Technical specifications

• Series/model: PIROX
• Type: Reaction centrifugal fan (plug fan), belt-driven transmission
• Insulation: Rock wool 145 kg/m³; standard thickness 150 mm
• Materials: Carbon rolled steel (frame and impeller)
• Impeller: Backward-curved, reinforced, self-cleaning, black heat-resistant finish
• Dynamic balancing of impeller
• Heavy-duty sealed monoblock construction
• Drive system: Guarded assembly per ISO 13857; maintenance-free high-efficiency belt
• Gas temperature range continuous: -40 °C to 350 °C (up to 450 °C on request)
• Maximum ambient motor temperature: 60 °C
• Motors: TEFC, IEC squirrel-cage, IP55, Class F insulation, B3 mounting on base frame
• Voltages: 230/400 V 50 Hz (up to 4 kW); 400/690 V 50 Hz (for higher powers)
• ErP: IE2 / IE3 / IE4 according to power rating (see technical datasheet)
• Finish: Heat-resistant coating; C3 corrosion protection