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BPRc/BPc

BPRc/BPc
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BPRc/BPc

Product catalog summary
General Concepts on Centrifugal Fans
Centrifugal fans are composed of a scroll housing with a rotating wheel, typically powered by an electric motor. Key characteristics include delivery, pressure, efficiency, and rotation speed.

Delivery
This is the volume of fluid moved by the fan per unit time, measured in m3/sec, m3/min, or m3/h.

Pressure
Total pressure is the sum of static and dynamic pressures, expressed in kgf/m2 or Pa. Static pressure overcomes circuit resistance, while dynamic pressure is the kinetic energy of the moving fluid.

Efficiency
Efficiency is the ratio of energy supplied by the fan to the fluid versus the energy used by the external source, calculated as η = V * pt / (6120 * P).

Rotation Speed
Measured in rotations per minute, it determines the fan's performance.

Performance Variations
Fan performance varies with changes in rotation speed and air specific gravity, with specific formulas to adjust for these variations.

Construction and Standards
Fans are constructed according to UNI EN ISO 13349 (2009) standards, with various configurations for different applications.

Symbols and Units
The document lists symbols and units used, including delivery (V), total pressure (pt), dynamic pressure (pd), speed (c2), fan rounds (n), noise level (Lp), power absorbed (P), and fan output (η).
Specifications and Characteristics of Centrifugal Fans

1. General Characteristics:
Centrifugal fans have a spiral casing with a rotating impeller driven by an electric motor. Key characteristics include flow rate, pressure, efficiency, and rotational speed.

2. Flow Rate:
Measured as the volume of fluid moved by the fan per unit time, expressed in m3/sec, m3/min, or m3/h.

3. Pressure:
Total pressure is the sum of static and dynamic pressures, expressed in kgf/m2 or Pa.

4. Efficiency:
Efficiency is calculated as η = (V * pt) / (6120 * P), where V is flow rate, pt is total pressure, and P is power absorbed.

5. Rotational Speed:
Measured in RPM, it determines the fan's performance characteristics.

6. Variations in Performance:
a) Rotational Speed Variation: Flow rate varies directly with rotation ratio, pressure with the square, and power with the cube of the rotation ratio.
b) Specific Gravity Variation: Flow rate remains constant, while pressure and power vary with specific gravity ratios.

7. Specific Gravity of Air:
Calculated using formulas for temperature and pressure variations.

8. Construction and Accessories:
Fans can be constructed in 16 orientations and may include accessories like inspection doors and anti-vibration joints. Special constructions include anti-spark and anti-corrosion designs.
Specifications:
Specifications focus on materials and construction for handling corrosive and explosive fluids, with parts coated or made from materials like austenitic stainless steels. Noise levels are measured in decibels at 1.5 meters, following UNI EN ISO standards.

Procedures:
Fans can be oriented in 16 positions, with rotation direction determined from the transmission side. Accessories include counterflanges and safety grates.

Standards:
Construction adheres to DIN standards for flanges, and noise measurement follows UNI EN ISO standards.

Recommendations:
Special constructions are recommended for explosive or corrosive environments, using non-ferrous materials for spark-proofing and special paints for corrosion-proofing.

Key Data from Tables:
  • Air speed values for various materials in suction plants range from 12 to 38 m/s.
  • Recommended air changes per hour vary by environment, such as 60 for heating plants and 6 for hospitals.
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Catalog excerpts

BPRc/BPc-2

Catalogo edizione Gennaio 2011 January 2011 cataloque edition Catalogue edition Janvier 2011 Katalag Ausgabe Jânner 2011 Catálogo edición Enero 2011 Concetti generali sui ventilatori centrifughi. Costruzione, orientamenti, caratteristiche, rumorosità, accessori, costruzioni speciali. General concepts on centrifugal fans. Construction, orientations, characteristics, noise level, fittings, special constructions. Idées générales sur les ventilateurs centrifuges. Construction, orientations, caractéristiques, niveau sonore, accessoires, constructions spéciales. Allgemeines iiber Radialventilatoren....

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BPRc/BPc-3

Simboli e unità di misura usate nelle pagine del catalogo. Symboles et unités de mesure employés dans le catalogue. V rrí/min. = Portata in rrí/min. V rrí/min. = Débit en rrí/min. V m3/h = Portata in rrí/ora V rrí/h = Débit en rrí/heure pt Kgf/m2 = Pressione totale in mm H20 o Kgf/m2 pt Kgf/m2 = Pression totale en mm H20 ou Kgf/m2 pt Pa = Pressione totale in Pascal pt Pa = Pression totale en Pascal pd Kgf/m2 = Pressione dinamica in mm H20 o Kgf/m2 pd Kgf/m2 = Pression dynamique en mm H20 ou Kgf/m2 pd Pa = Pressione dinamica in Pascal pd Pa = Pression dynamique en Pascal c2 = Velocità in m/s sulla...

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BPRc/BPc-4

Esecuzioni costruttive dei ventilatori secondo le norme UNI EN ISO 13349 (2009). Fans constructive executions in conformity with rules UNI EN ISO 13349 (2009). Executions constructives des ventilateurs sélon UNI EN ISO 13349 (2009). Diese Ventilatoren werden nach den Normen gebaut UNI EN ISO 13349 (2009). Realizaciones constructivas de los ventiladores de conformidad con las normas UNI EN ISO 13349 (2009). Accoppiamento a cinghie. Girante calettata a sbalzo. Supporto montato su sedia al di fuori del circuito dell'aria. Temperatura max dell'aria 90°C senza ventolina dl raffreddamento; 350 °C con...

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BPRc/BPc-5

Concetti generali sui ventilatori centrifughi Il ventilatore centrifugo è costituito da una coclea nel cui interno ruota una girante sotto l'azione di una sorgente di energia ester- na (normalmente un motore elettrico). Le caratteristiche principali distintive di un ventilatore centrifugo sono: b) pressione d) velocità di rotazione È rappresentata dal volume del fluido aspirato dal ventilatore nel- l'unità di tempo; viene espressa normalmente in m3/sec, m3/min., Viene comunemente espressa in kgf/m2 o Pa. La pressione gene- rata da un ventilatore viene chiamata TOTALE (pt); essa rappre- senta...

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BPRc/BPc-6

General concepts abouts centrifugal fans The centrifugal fan essentially in a scroll in which a wheel rotates. The wheel's movement is caused by an external energy source, that is usually an electric motor. The main characteristics of a cen- b) pressure d) rotation speed It is indicated by the value of the fluid intaken through the fan in the time unit; normally this is stated by the ratio m3/sec, m3/min., It is usually indicated by the ratio kgf/m2 or Pa. The pressure gen- erated through a fan is named TOTAL (pt); it is the sum of two dif- ferent pressures: STATIC + DYNAMIC. The static pressure...

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BPRc/BPc-7

Généralités sur les ventilateurs centrifuges Le ventilateur centrifuge est constitué essentiellement par une bâche spirale où une couronne mobile tournante dans l'intérieur sous l'action d'une source d'énergie extérieure (normalement un moteur éléctrique). Les caractéristiques principales distinctives d'un ventilateur cen- trifuge sont: b) pression d) vitesse de rotation Il est représenté par la valeur du fluide aspiré par le ventilateur dans l'unité de temp.s.; il est exprimé normalement en m3/sec, Elle est exprimée en kgf/m2 ou Pa. La pression produite par un ventilateur s'appele TOTALE (pt);...

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BPRc/BPc-8

Allgemeines über Radialventilatoren Der Radialventilator besteht im wesentlichen aus einem Gehàuse, in dem sich ein Laufrad dreht, welches von einer auBen befindlichen Energiequelle angetrieben wird. Die wichtigsten Parameter welche einen Ventilator bestimmen sind folgende: Sie ist von der Menge der vom Ventilator abgesaugten Flüssigkeit in der Zeiteinheit dargestellt. Sie wird in m3/sec, m3/min., oder Der Druck ist meistens in kgf/m2 oder Pa. Der von einem Ventilator erzeugte Druck heisst GESAMTDRUCK (pt): er stelli die Summe vom statischen + dynamischen Druck dar. Der statische Druck (p.s.)...

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BPRc/BPc-9

Conceptos generales sobre los ventiladores centrífugos El ventilador centrífugo está formado de una cóclea, en cuyo inte- rior gira una rueda de paletas bajo la acción de una fuente de ener- gía exterior (normalmente un motor eléctrico). Las características distintivas principales de un ventilador centrífugo son: Está representado por el volumen del fluido aspirado por el venti- lador en la unidad de tiempo; generalmente, se expresa en Generalmente, está indicada en kgf/m2 o Pa. La presión produci- da por un ventilador se llama TOTAL (pt); la misma representa la suma de dos presiones diferentes:...

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BPRc/BPc-10

Le caratteristiche riportate sui diagrammi sono riferite ad aria alla temperatura di +15°C, alla pressione barometrica di 760 mm Hg, con peso specifico di 1,226 Kg/ m3 I valori di pressione sonora indicati in catalogo sono espressi in decibel scala A (db/A), si Intendono misurati In campo libero alla distanza di m.1,5 dal ventilatore funzionante alla portata di massimo rendimento e collegato a tubazione In aspirante e In premente (norme UNI EN ISO 3740-3744-3746-13347). Tutti I ventilatori possono essere costruiti In 16 posizioni diverse della bocca di mandata (8 con senso di rotazione orarlo...

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BPRc/BPc-11

Die Parameter in den Tabellen bezlehen slch auf Luft mit elner Temperatur von 15°C bei elnem Luftdruck von 760 mm Hg. (Spezlfisches Gewicht der Luft 1,226 Kg/m3). Die Schallwerte sind In Dezlbel, Skala A db (A) angegeben. Sie wurden lm Freifeld im Abstand von 1,5 m entfernten, unten Vollast arbeltenden, saug-und driickseltig ange- schlossenem Ventilator entsprechend (Normen UNI EN ISO 3740-3744-3746-13347). Alle Radlalventllatoren können mit 16 verschiedenen Stellungen der Drucköffnung gebaut werden (8 mit Uhrzelgersinn RD und 8 mit Gegenuhrzeigerslnn LG) wie In der Tabelle der Elnstellungen...

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All EUROVENTILATORI INTERNATIONAL catalogs and technical brochures

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  2. EU/EUM/MPR/TR

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  3. EVP/EVF/EVL

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  4. AP APR

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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.