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GFF

GFF

Product catalog summary

Document Overview

This technical catalogue provides comprehensive multilingual specifications for a series of high-efficiency centrifugal fans (GFF series), covering usage, technical data, mechanical dimensions, installation guidelines, component terminology, and compliance with international standards.

1. Use and Executions

The fans are designed for industrial applications such as drying, pneumatic conveying, fume extraction, forced draft, and material transport (excluding filamentous materials). They feature high efficiency via impellers with overturned blades and special profiles, and a flat power absorption curve to prevent motor overload. Standard operation is up to 90°C; for temperatures between 90°C and 350°C, special heat-resistant fans with aluminum coatings are used. Supplementary technical and accessory information is available in dedicated booklets.

2. Technical Specifications and Characteristics

Key parameters include flow rate (±5% tolerance), noise levels (+3 dBA adjustment), absorbed power (kW), and maximum permissible RPM, which decrease with increasing operating temperature:

Temperature Range	RPM Limits
< 90°C	1000 to 4500 RPM depending on model
90°C to 200°C	900 to 4000 RPM depending on model
200°C to 350°C	800 to 3450 RPM depending on model

Technical data includes detailed dimensional parameters, weights, and flange details for suction and delivery sides. Verification of power and noise data with the technical office is recommended.

3. Supports and Bearings

The document specifies various support types and bearing models (e.g., 6305 Z, NU 310 ECP, 22216 EK), distinguishing between impeller and pulley sides. Versions with cooling fans have specific support codes and dimensions. Proper selection ensures compatibility and maintenance efficiency.

4. Dimensions, Orientation, and Installation

Comprehensive dimensional data is provided for each fan model, including parameters such as A, B, Ca, E, F, G, H, H1, H2, K, Jd, Jp, Js, Jt, weights, and mounting hole details. Fans may have adjustable orientation, with standard position RD 270° (distance base-to-axis = dimension H). Alternative orientations (e.g., 30°, 45°) are available on request, with corresponding dimension adjustments detailed in orientation tables. Versions with cooling fans have dimensions indicated in parentheses.

Baseframe dimensions (notably for model E12) and mounting hole specifications are included to facilitate secure installation.

5. Fan Components and Terminology

Clear multilingual terminology identifies key fan parts and supports, aiding international communication and maintenance:

Fan Parts: Casing (V01), Base (V05), Impeller (V10), Suction Inlet (V15), Block Support (V25)
Support Parts: Shaft (P01), Key (P02), Support Casing (P03), Cover (P04), Greaser (P06), Bearing (P08), Cooling Fan (P14), among others

6. Flange Specifications

Detailed flange dimensions for suction and delivery sides include diameters, number and size of holes, and threaded screw diameters. All threads conform to ISO metric standards with triangular profiles and coarse pitch. These parameters ensure proper assembly and compatibility with connecting components.

7. Symbols, Units, and Standards

The document standardizes symbols and units for parameters such as flow rate (V), total pressure (pt), dynamic pressure (pd), outlet speed (c), power (kW), rotation speed (RPM), noise level (dBA), and efficiency (%). All data refer to air at +15°C, atmospheric pressure of 760 mmHg, and specific weight of 1.226 kg/m³. Noise measurements comply with UNI EN ISO standards (3740, 3744, 3746, 13347), and manufacturing/testing follow UNI ISO 13349:2002 and UNI 10531:1995.

Critical Information and Best Practices

Operate fans within specified temperature limits: standard up to 90°C, special versions up to 350°C.
Confirm power absorption and noise data with the technical office before application.
Observe RPM limits strictly according to temperature to avoid damage.
Select correct orientation and mounting configurations using provided tables.
Account for cooling fan presence when referencing dimensions and weights.
Use specified bearing types for maintenance to ensure performance and compatibility.
Follow international standards for testing and noise measurement to guarantee reliability.

Summary

This document is a detailed technical reference for the selection, installation, operation, and maintenance of GFF series industrial centrifugal fans. It provides essential mechanical, operational, and compliance data to support engineers and technicians in diverse industrial environments.

Catalog excerpts

Contents Table des matières Inhaltsverzeichnis Sumario ITALIANO • Edizione catalogo (mm/aaaa) • Per vericare se questa versione di catalogo è l'ultima disponibile, collegarsi con www.cimme.it, alle sezioni Prodotti o Download. ENGLISH • Catalogue edition (mm/yyyy) • Connect to www.cimme.it, sections Products or Download to check if this is the latest catalogue version. FRANÇAIS • Edition catalogue (mm/aaaa) • Pour vérier si cette version indiquée dans le catalogue est la dernière disponible, se connecter à www.cimme.it, aux sections Produits ou Téléchargement. DEUTSCHE • Ausgabe des Katalogs...

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Impiego ed Esecuzioni Use and Executions Emploi et Exécutions Anwendung und Ausführungen Uso y Ejecuciones I ventilatori centrifughi di questa serie ad alto rendimento sono adatti all’impiego negli impianti di essiccazione, trasporti pneumatici, aspirazione fumi, tiraggio forzato nei camini, trasporto di granulati e segatura in miscela con l’aria con l’esclusione di materiali lamentosi. La loro principale caratteristica è quella di abbinare l’alto rendimento (derivante dall’impiego di una girante a pale rovesce, prolo speciale) con l’idoneità al trasporto di materiali in miscela con l’aria. Questi...

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CD Aspetto e Campo di funzionamento □D Appearance and Range of operation [CilfimCl CED Aspect exterieur et Champ de fonctionnement CD Aspecto y Campo de funcionamiento

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O OOOO OO O O OOOO OOOOOi-

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Notes Remarques Hinweise Notas

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Dimensioni d’ingombro e Pesi Overall dimensions and Weights Dimensions hors-tout et Poids Abmessungen und Gewichte Dimensiones del espacio ocupado y Pesos Il ventilatore è orientabile. Le grandezze 004510-005010 seguono un orientamento di 30°. Per i 45° specicarlo in ordine. The fan is adjustable. Sizes 004510-005010 follow a 30° orientation. As for 45°, please specify in the order. Le ventilateur est orientable. Les grandeurs 004510-005010 suivent une orientation de 30°. Pour 45°, il faut le spécier dans la commande. Der Ventilator ist einstellbar. Die Größen 004510-005010 folgen einer Einstellung...

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Dimensioni d’ingombro e Pesi Overall dimensions and Weights Dimensions hors-tout et Poids Abmessungen und Gewichte Dimensiones del espacio ocupado y Pesos Tabella orientamenti Orientation table Tableau des orientations Tabelle der Einstellungen Tabla de orientaciones L’orientamento rafgurato a sinistra è RD 270 e la sua distanza tra la base e l’asse corrisponde alla dimensione H in tabella. Per altre rotazioni consultare la Tabella orientamenti che fornisce la corrispondenza con le dimensioni H, H1 o H2. Il codice Supporto e le dimensioni, indicati tra parentesi (...), si riferiscono all’esecuzione...

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Dimensioni d’ingombro e Pesi Overall dimensions and Weights Dimensions hors-tout et Poids Abmessungen und Gewichte Dimensiones del espacio ocupado y Pesos Il ventilatore non è orientabile. The fan is not adjustable. Le ventilateur n’est pas orientable. Der Ventilator ist nicht einstellbar.

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Dimensioni d’ingombro e Pesi Overall dimensions and Weights Dimensions hors-tout et Poids Abmessungen und Gewichte Dimensiones del espacio ocupado y Pesos Tabella orientamenti Orientation table Tableau des orientations Tabelle der Einstellungen Tabla de orientaciones L’orientamento rafgurato a sinistra è RD 270 e la sua distanza tra la base e l’asse corrisponde alla dimensione H in tabella. Per altre rotazioni consultare la Tabella orientamenti che fornisce la corrispondenza con le dimensioni H, H1, H2, H3 o H4. Il codice Supporto e le dimensioni, indicati tra parentesi (...), si riferiscono...

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Dimensioni basamento (per E12) Baseframe dimensions (for E12) Dimensions du châssis support (pour E12) Abmessungen des Grundrahmens (für E12) Dimensiones bancada (para E12) Le dimensioni fra parentesi (...) si riferiscono all’esecuzione con ventolina di raffreddamento. I 2 valori di Peso indicati in tabella si riferiscono ai valori minimi e massimi delle quote Nb The dimensions in brackets (...) refer to the manufacture with cooling fan. The 2 Weight values indicated in the table refer to the minimum and maximum values of Nb/Mb dimensions Les dimensions entre parenthèses (...) se réfèrent à la...

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