ETK Number: S-FAN-CEN-FIM-16271   Manufacturer: FIMA   Model: Centrifugal Fan         Price: Request a Quote   Comment: Centrifugal fans from FIMA are used in the areas of chemistry, environment engineering and the textile industry among many others.   Description: Assured safety through gas-tight and pressure-resistant casings Conveying and compressing explosive or hazard-ous process gases imposes special requirements as the design and the safety aspects of the fans. FIMA is one of the leading manufacturers of gas-tight and pressure-resistant centrifugal fans for highly demanding applications. The fans are designed and manufactured on the basis of the applicable national and international standards and regulations as well as many years of experience in this area. The use of standardised subassemblies in connection with custom designs permits safe operation at high temperatures and system pressures. Resistance against corrosion and abrasive materials is ensured through specially selected high quality materials and surface coatings. Centrifugal fans from FIMA are used in the areas of chemistry, environment engineering and the textile industry among many others. Performance range of gas-tight and pressure resistant centrifugal fans from FIMA: System pressures ranging from vacuum to 100 bar Temperatures from -150°C to +700°C Volume flow rates from 20 m³/h to 200 000 m³/h Max. pressure ratio up to 2 - referred to air at ambient conditions, single-stage Conveying of explosive, corrosive and abrasive gas mixtures Rotor speed up to 8 000 rpm with coupling/belt drives and up to 20 000 rpm with gear Drive power up to 2 000 kW Technical description: The gas-tight and pressure-resistant centrifugal single or multistage fans are based on a modular system. Standardised and well-proven subassemblies combined with custom designs permit an economically viable machine concenpt under consideration of the process-dependent operating conditions. Machines with a direct drive system are available in two different types. In the more simple type, the impeller is fitted directly to the shaft of the drive motor. This type is augmented by coupling machines in which the bearing for the rotor an the seal for the casing may be adapted to specific requirements. The use of belt drives and gears results in compact fans which can be operated at high speed (over 3 000 rpm). A low space requirement and a higher efficiency make operation of these machines much more economical. High drive power types are manufactured with splitted casings for the fan and bearings on both sides of the shaft. Leakage of the process gas or the entry of air through the passage of the shaft is avoided by means of specially designed carbon rings or mechanical seals. Both the casing of the fan and the drive unit are mounted on a rigid base frame which has been optimised with respect to low vibrations and low-noise operation. The machined supporting surfaces for the motor and the bearing pedestal assembly or the gear ensure simply, accurate and reproducible alignment of the components for assembly and maintenance work.

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