Centrifugal fans type H,HR and HS are designed for heavy duty industrial applications with medium-low flow rate and where the complete reliability is considered essential.
Usual design conditions are:
- volumetric flowrate up to 250.000 m3/h for H series, 150.000 m3/h for HR series and 100.000 m3/h for HS series
- static pressure up to 2.000 mmH2O
- installed power up to 2.000 kW for H series and 1000 kW for HR and HS series
The H-HR-HS impeller has 8 backwardly curved blades, welded between a substantial back-plate and a streamlined side-plate. The impeller is arranged to give the highest efficiency.
Static efficiencies of 75% are obtained and noise levels are kept to a minimum.
The H-HR-HS impeller is best suited for fluid with dusts maximum concentration of 200 mg/Nm3.
Heavy steel plates for scroll and base construction provide the required rigidity and prevents vibrations.
The fan performance is checked out by testing the fan in accordance with AMCA 210-85 fig.7 and AMCA 210-85 fig.16.
Wheels are statically and dynamically balanced with electronic equipment in accordance with ISO 1940 class 2.5