Centrifugal fan Kron

for siloextractionfor air circulation

Product overview
The KRON series is a medium-pressure single-inlet centrifugal fan with a sheet-steel casing and impeller, built for industrial use where high pressure and low-to-medium airflow are required. The System 4 arrangement mounts the impeller directly on the motor shaft while the motor is supported on a rigid base frame, ensuring permanent alignment, high power transmission efficiency and reduced maintenance needs.

Suitable for

• Suction and conveying of clean to dust-laden air, including sawdust, wood chips, shavings and non-fibrous granules
• Pneumatic conveying systems
• Material drying processes
• Pressurization and ventilation systems
• Foundries and metalworking plants
• Pulp and paper mills
• Industrial furnaces
• Chemical industry air handling

Key Features

• Medium-pressure centrifugal design with single inlet
• Heavy-duty construction: casing and impeller in sheet steel (standard ferrous parts in carbon steel)
• System 4 configuration: impeller on motor shaft, motor on rigid base frame for permanent alignment and direct-drive efficiency
• Backward-curved impeller with self-cleaning profile; statically and dynamically balanced for quiet, efficient operation
• Dynamic stability elements including front support foot to minimize vibration
• Drive options: belt drive from size 710; direct drive from size 1120
• Mounting: adjustable on-site up to size 630; sizes 710–1000 have factory-set orientation
• Assembly methods: precision crimped assembly up to size 630; continuous welded construction from size 630 for enhanced rigidity
• Thermal ratings: standard continuous operation up to 130 °C; high-temperature executions available up to 250 °C with specific configurations
• Standard industrial coating for non-aggressive environments

Customization Options

• Special materials: stainless steel (AISI 304 / 316), Corten, Hardox
• Surface protections: heat-resistant coatings, hot-dip galvanizing, C4 / C5 coatings for saline or highly aggressive environments
• Special executions: high-temperature versions, inspection doors, drain outlets, sealed or thermally insulated casings, anti-spark designs, ATEX-certified motors

Motorization and Efficiency

• TEFC motors (totally enclosed, fan-cooled) suitable for demanding industrial environments
• ErP compliance: IE3 standard from 0.75 kW to 55 kW; IE4 from 75 kW upwards; IE2 for ratings below 0.75 kW

Technical specifications

• Product type: Medium-pressure centrifugal fan, single inlet
• Series: KRON
• Standard construction material: sheet steel (ferrous parts in carbon steel)
• Impeller: backward-curved, self-cleaning profile, statically and dynamically balanced
• Drive configuration: System 4 (impeller on motor shaft; motor on rigid base frame)
• Drive options by size: belt drive from size 710; direct drive from size 1120
• Mounting: adjustable up to size 630; factory-set orientation for sizes 710–1000
• Assembly: crimped assembly up to size 630; continuous welded from size 630 upwards
• Operating temperature: standard up to 130 °C continuous; high-temperature option up to 250 °C with specific measures
• Typical handled media: clean to slightly dusty air, sawdust, wood chips, shavings, non-fibrous granular materials
• Typical applications: pneumatic conveying, material drying, pressurization, foundries, pulp mills, industrial furnaces, chemical industry
• Optional materials and protections: AISI 304/316, Corten, Hardox, heat-resistant coatings, galvanizing, C4/C5 coatings
• Options: inspection doors, drain outlets, sealed/insulated casings, anti-spark executions, ATEX motors
• Motor options: TEFC motors; ErP classes IE2/IE3/IE4 depending on power