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Centrifugal Fans AT

Centrifugal Fans AT
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Centrifugal Fans AT

Product catalog summary
Overview: The document provides comprehensive information on Nicotra Gebhardt's AT series of belt-driven centrifugal fans, certified by AMCA. It emphasizes the company's focus on quality, energy efficiency, and customer flexibility through standardized dimensions and advanced production technology.
Specifications: The document details various fan models such as ADH-E, RDH-E, and RZR, with sizes from 0160 to 1000. These fans are AMCA certified, ensuring compliance with AMCA Publication 211 standards. The AT series is noted for its compactness, efficiency, and versatility, with performance and sound data tested according to AMCA 210/99 standards.
Design and Features: The fans feature a compact base frame for space-saving and easy installation, with double-inlet impeller geometries like forward-curved and backward-curved designs. High-quality materials and innovative manufacturing processes enhance durability and performance.
proSELECTA II Program: This technical selection program allows users to configure custom fan designs, providing technical data, sound levels, and dimension specifications. It ensures reliable selection by excluding technically impermissible options and offers advantages like faster order processing and configuration modifications.
Performance and Applications: The AT series fans are suitable for mechanical ventilation at temperatures from -20°C to +100°C, offering airflow up to 180,000 m³/h and total pressure up to 1,400 Pa. Performance curves and technical data highlight their efficiency and quiet operation.
Innovations and Improvements: Recent developments include a new seaming process for enhanced structural strength and reduced rust risk, the use of hollow shafts for weight reduction, and the availability of spark-proof versions.
Specifications and Design: The document describes high-performance centrifugal fans like the AT-G2C-C2 and AT-G3C-C2 models, constructed using galvanized steel EN 10142. Smaller sizes use roller-lock seaming, while larger sizes employ Pittsburgh lock seams. The G2C-C2 model is reinforced for higher speed and power.
Fittings and Accessories: Standard fittings include mounting feet, motor brackets, discharge flanges, and various guards. Optional accessories for bulk orders include inspection doors, drain plugs, and components made of stainless steel or aluminum.
Corrosion Protection: Details on corrosion protection classes (S40, K90, P100) with specific coating thicknesses and colors are provided. Continuous welding of impeller blades and casings is recommended for increased resistance to humid or aggressive environments.
Installation and Safety: Fans require protective guards before operation, complying with DIN EN ISO 12100 and DIN EN ISO 13857 standards. Optional safety guards and contact guards are available for additional protection.
Additional Features: Features like split casings for easier transport and maintenance, stainless steel components for increased corrosion resistance, and lubrication systems for fan bearings are highlighted.
Motor Arrangements and Belt Tensioning: The document outlines motor arrangements, permissible motor power, and belt tensioning procedures. Correct belt tensioning is crucial for bearing longevity, with guidelines provided for achieving the correct tension.
Minimum Pulley Diameter: Specifications for minimum pulley diameters for different fan sizes and models are provided to prevent exceeding admitted bearing loads.
Performance and Efficiency: The document explains performance curves, efficiency, and the relationship between total pressure rise and volume flow rate. Efficiency decreases with lower fan speeds, and formulas are provided to calculate actual efficiency and motor rating.
Twin Fan Units: Performance data for twin fan units, identified as "G2," can be calculated using specific formulas provided in the document.
Certification: Nicotra Gebhardt S.p.A. certifies specific fan models and sizes, ensuring they meet outlined specifications and performance standards.
Sound and Noise Levels: Methods for calculating "A" weighted sound power levels for fan intake and discharge are detailed, with correction data for noise levels based on fan speed and flow rate.
Explosion Protection and Safety: Fans for explosive atmospheres must comply with EC Directive 94/9/EG (ATEX 95), with outlined safety measures and operational preconditions.
Quality Management and Compliance: Nicotra Gebhardt's quality management system is certified to DIN EN ISO 9001 standards, ensuring high product quality and data reliability.
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Catalog excerpts

Centrifugal Fans AT-1

Centrifugal Fans AT belt driven

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Centrifugal Fans AT-2

AMCA Nicotra Gebhardt S.p.A. (Italy) certifies that ADH-E fans of the E0, E2, E4, E6 and E7 versions, from sizes 0160 to 0560, RDH-E fans of the E0, E2, E4, E6 and E7 versions, from sizes 0180 to 0560, ADH and RDH fans of the L, R, K, K1 and K2 versions, from sizes 0630 to 1000, AT fans of the S, SC, C and TIC versions, from sizes 7/7 to 30/28, shown herein are licensed to bear the AMCA Seal. Nicotra Gebhardt GmbH (Germany) certifies that RZR fans of the 11, 12, 15 versions, from sizes 0355 to 1000, shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures...

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Centrifugal Fans AT-3

The Nicotra Gebhardt portfolio A strong provider for many optimal solutions When it comes to radial fans, we are the first people you should talk to. From belt-driven radial fans to plugfans, it’s all there in our product portfolio. We offer the largest, most comprehensive range of products in this area – and of course the matching services. double-inlet forward-curved impeller geometry double-inlet inch diameters forward-curved impeller geometry double-inlet backward-curved impeller geometry double-inlet hollow aerofoil impeller geometry When everything fits To us, perfection in our product...

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Centrifugal Fans AT-4

proSELECTA II Simple and reliable selection proSELECTA II is a technical selection program that allows you to configure your own individually designed fan. It provides you with the opportunity to choose from the entire range of fan types and their associated options. The result from proSELECTA II is the provision of all the technical data for your fan, including sound level data, dimension specifications and accessories. Apart from that, as a registered user, your purchase prices are provided. Additionally fully dimensioned drawings in DXF format are available, which can be downloaded and transferred...

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Centrifugal Fans AT-5

High performance centrifugal fan ADH double inlet for belt drive impeller with forward curved blades of galvanised sheet steel High performance centrifugal fan AT double inlet for belt drive impeller with forward curved blades of galvanised sheet steel High performance centrifugal fan RDH double inlet for belt drive centrifugal impeller with backward inclined blades High performance centrifugal fan RZR double inlet for belt drive high performance impeller with backward curved hollow section true aerofoil blades Fittings / Accessories A complete system accessories A echnical description t A perating...

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Centrifugal Fans AT-6

The Nicotra Gebhardt best-sellers, simply! The series AT Fans of AT series don’t need any presentation: they have been one of the main strengths in the Nicotra Gebhardt product range for over 35 years and have long been appreciated for their unequalled combination of compactness, efficiency, quietness of operation and versatility, at an extremely affordable price. News How we can improve a perfect fan? We tried, anyway: we developed a new seaming process, to join the back plate to the side plates with a fully automated process. The result is a new scroll without welding and whatever can become...

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Centrifugal Fans AT-7

Product overview range AT This kind of fans are specially conceived for mechanical ventilation, at temperatures from -20 °C to +40 °C on S, SC, G2L and SC2 models, or up to 100 °C on AR, TIC, G2C, G2C-C2, G3C, G3C-C2 models. Air performance and sound data have been obtained in a laboratory registered by AMCA for AMCA 210/99 air performance testing and they are within the tolerances allowed by the DIN 24166 standard for Class 2. Single, twin and triple fans mpeller size (diameter/width) from 7/7 to 30/28 I ap-jointed scroll of galvanized steel assembled with roller-lock L seaming (sizes up to...

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Centrifugal Fans AT-8

Belt Driven Centrifugal Fans / AT / Technical Data Performance certified is for installation type B - free inlet, ducted outlet. Power rating (kW) does not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). AT 7/7 Technical Data Impeller Data Impeller diameter Number of blades Moment of Inertia Impeller Data Impeller weight Density of media Tolerance class (DIN 24166) Performance Curves Please note coloured area! N all types suitable N do not use in this area Nicotra Gebhardt S.p.A certifies that the fan shown herein is licensed to bear...

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Centrifugal Fans AT-9

Belt Driven Centrifugal Fans / AT / Technical Data AT 7/7 Dimensions in mm, subject to change. AT S-7/7 5 kg

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Centrifugal Fans AT-10

Belt Driven Centrifugal Fans / AT / Technical Data Performance certified is for installation type B - free inlet, ducted outlet. Power rating (kW) does not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Impeller Data Impeller weight Density of media Tolerance class (DIN 24166) Performance Curves Please note coloured area! N all types suitable N AT AR only N do not use in this area Nicotra Gebhardt S.p.A certifies that the fan shown herein is licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed...

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Centrifugal Fans AT-11

Belt Driven Centrifugal Fans / AT / Technical Data AT 9/7 Dimensions in mm, subject to change. AT S-9/7 6.6 kg

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Centrifugal Fans AT-12

Belt Driven Centrifugal Fans / AT / Technical Data Performance certified is for installation type B - free inlet, ducted outlet. Power rating (kW) does not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). AT 9/9 Technical Data Impeller Data Impeller diameter Number of blades Moment of Inertia Impeller Data Impeller weight Density of media Tolerance class (DIN 24166) Performance Curves Please note coloured area! N all types suitable N AT AR only N do not use in this area Nicotra Gebhardt S.p.A certifies that the fan shown herein is licensed...

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Centrifugal Fans AT-13

Belt Driven Centrifugal Fans / AT / Technical Data AT 9/9 Dimensions in mm, subject to change. AT S-9/9 7.9 kg

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Centrifugal Fans AT-14

Belt Driven Centrifugal Fans / AT / Technical Data Performance certified is for installation type B - free inlet, ducted outlet. Power rating (kW) does not include transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Technical Data Impeller Data Impeller diameter Number of blades Moment of Inertia Impeller Data Impeller weight Density of media Tolerance class (DIN 24166) Performance Curves Please note coloured area! N all types suitable N AT AR only N do not use in this area Nicotra Gebhardt S.p.A certifies that the fan shown herein is licensed to...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.