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Centrifugal Fans

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Centrifugal Fans

centrifugal fans are offered in both single and double-sided inlet design and are also available with different drives. Energy-saving EC external rotor motors, conventional AC external rotor motors as well as IEC standard motors are used. A distinction is also made between fans with forward or backward curved impellers.

Centrifugal Fans (backward curved)

EC Centrifugal fans ; backward curved (Type: EHAG...)

Properties

  • flow rates up to 13,400 m³/h
  • size: 225 – 560 mm (impeller diameter)
  • highly efficient EC technology
  • compact design
  • backward curved impellers
  • feet can be offset by 90°
  • variable discharge direction
  • integrated control system (EC controller)
  • speed is 100% infinitely variable

Casing

Casings are made of galvanised sheet steel. Side parts and the spiral-shaped guide plate are connected with rivets. In the side panels, there are holes for the fixing of the feet which can be implemented by 90°.

up to size 400
casing in spiral design
from size 450
casing in rectangular form

Impellers

The impellers are mounted directly on the rotors of the external rotor motors and are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The motors are fitted with an outgoing cable. The electrical connection is made via an IP44 terminal box which is supplied loose.

Downlods

 
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EC Centrifugal fans ; backward curved

Centrifugal fans ; backward curved (Type: E/DHA...)

Properties

  • low rates up to 28,000 m³/h
  • size: 225 – 560 mm (impeller diameter)
  • asynchronous external rotor motor
  • backward curved impellers
  • feet can be offset by 90°
  • protection class IP54
  • thermal class F
  • connection cable on side
  • motor protection by thermal contacts
  • speed is variable using auto transformers

Casing

Casings are made of galvanised sheet steel. Side parts and the spiral-shaped guide plate are connected with rivets. In the side panels, there are holes for the fixing of the feet, which can be implemented by 90°.

up to size 400
casing in spiral design
from size 450
casing in rectangular form
model – EHA
single inlet design (E)
model – DHA
double-sided inlet design (D)

Impellers

The backward curved aluminium impellers are mounted directly on the rotors of the external rotor motors and are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The motors are fitted with an outgoing cable. The electrical connection is made via an IP44 terminal box which is supplied loose.

Downlods

Catalogue: World of fans (Standard fans) Catalogue: World of fans (Standard fans)

Format: .pdf

Size: 19.66 MB

 
 
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Centrifugal fans ; backward curved (Type: E/DHA...)

Centrifugal fans with IEC standard motor ; backward curved (Type: EHN...)

Properties

  • flow rates up to 21,000 m³/h
  • size: 200 – 630 mm (impeller diameter)
  • casing made of galvanised sheet steel
  • casing position: LG or RD
  • IEC standard motor, IP55, thermal class F
  • backward curved impellers
  • terminal box directly on motor, IP55
  • motor protection through PTC thermistors

Casing

The casing is made of galvanised sheet steel. The side parts and the spiral plate are connected to each other by rivets. With size 200, the motors are flange-mounted directly. From size 225, the motors are mounted on a console. A plastic coating is available upon request.

Impellers

The impellers of the EHN … types are produced with backward curved blades made entirely of aluminium. The inlet cones made of galvanised sheet steel are screwed into the casing. The impellers together with the impeller hub are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The electrical connection is made through the terminal box on the motor in protection class IP55.

Downlods

Catalogue: World of fans (Standard fans) Catalogue: World of fans (Standard fans)

Format: .pdf

Size: 19.66 MB

 
Design and Downloads Collapse
Centrifugal fans with IEC standard motor
Range Type Applications
EC-Centrifugal fans with backward curved centrifugal impellers
EHAG… In this series, only energy efficient EC external rotor motors are used for the drive. The high-performance centrifugal fans with backward curved blades are specially designed for use in modern ventilation and air conditioning equipment, and are suitable for the conveying of slightly dusty air and slightly aggressive gas and vapours. The sizes correspond to the standard number series R20 according to DIN323.
Centrifugal fans with backward curved centrifugal impellers
E/DHA… These centrifugal fans have been developed especially for use in modern ventilation and air-conditioning equipment, and are suitable for the conveying of slightly dusty air and slightly aggressive gas and vapours. The sizes correspond to the standard number series R20 according to DIN232.
Centrifugal fans with IEC standard motor and backward curved centrifugal impellers
EHN…

The high performance centrifugal fans of the EHN… series are suitable for the conveying of clean or slightly dusty air and slightly aggressive gas and vapours. They are not gas-tight. The permissible conveying medium temperature is between -30°C and 60°C.

Centrifugal Fans (forward curved)

Centrifugal fans ; forward curved (Type: E/DRA...)

Properties

  • flow rates up to 15,000 m³/h
  • size: 180 – 400 mm (impeller diameter)
  • casing made of galvanised sheet steel
  • asynchronous external rotor motor
  • forward curved impellers
  • feet can be offset by 90°
  • protection class IP54
  • thermal class F
  • connection cable on side
  • motor protection by thermal contacts
  • speed is variable using auto transformers

Casing

Casings are made of galvanised sheet steel. Side parts and the spiral-shaped guide plate are connected with rivets. In the side panels, there are holes for the fixing of the feet, which can be implemented by 90°.

model – ERA
single inlet design (E)
model – DRA
double-sided inlet design (D)

Impellers

The impeller is made of galvanised sheet steel and is mounted directly to the rotor of the external rotor motor and balanced dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The drive motors are fitted with an outgoing cable. The electrical connection is made via an IP44 terminal box which is supplied loose.

Downlods

Catalogue: World of fans (Standard fans) Catalogue: World of fans (Standard fans)

Format: .pdf

Size: 19.66 MB

 
 
Design and Downloads Collapse
Centrifugal fans ; forward curved

Centrifugal fans with slippage characteristics (Type: E/DRA...)

Properties

  • flow rates up to 12,000 m³/h
  • size: 249 – 399 mm (impeller diameter)
  • steep volume-pressure curve
  • extremely low starting current
  • casing made of galvanised sheet steel
  • asynchronous external rotor motorr
  • forward curved impellers
  • protection class IP54
  • thermal class F
  • motor protection by thermal contacts
  • speed is variable using auto transformers

Casing

The casing is made of galvanised sheet steel. On request, a plastic coating can be applied at an additional cost.

model – ERA
single inlet design (E)
model – DRA
double-sided inlet design (D)

Impellers

The impeller is made of galvanised sheet steel, and is mounted directly to the rotor of the external rotor motor and balanced dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The drive motors are fitted with an outgoing cable. The electrical connection is made via an IP54 terminal box which is supplied loose.

Downlods

Catalogue: World of fans (Standard fans) Catalogue: World of fans (Standard fans)

Format: .pdf

Size: 19.66 MB

 
 
Design and Downloads Collapse
Centrifugal fans with slippage characteristics

Centrifugal fans with IEC standard motor ; forward curved (Type: ERN...)

Properties

  • flow rates up to 11,000 m³/h
  • size: 200 – 450 mm (impeller diameter)
  • casing made of galvanised sheet steel
  • casing position: LG or RD
  • IEC standard motor, IP55, thermal class F
  • forward curved impellers
  • terminal box directly on motor, IP55
  • motor protection through PTC thermistors

Casing

The casing is made of galvanised sheet steel. The side parts and the spiral plate are connected to each other by rivets. With size 200, the motors are flange-mounted directly. From size 225, the motors are mounted on a console. A plastic coating is available upon request.

Impellers

The impellers of the ERN… types with forward curved blades are manufactured from galvanised sheet steel. The inlet cones made of plastic are screwed into the casing. The impellers together with the impeller hub are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.

Electrical connection

The electrical connection is made through the terminal box on the motor in protection class IP55.

Downlods

Catalogue: World of fans (Standard fans) Catalogue: World of fans (Standard fans)

Format: .pdf

Size: 19.66 MB

 
Design and Downloads Collapse
Centrifugal fans with IEC standard motor
Range Type Applications
Centrifugal fans with forward curved centrifugal impellers
E/DRA… These centrifugal fans have been developed especially for use in modern ventilation and air-conditioning equipment, and are suitable for the conveying of slightly dusty air and slightly aggressive gas and vapours. The sizes correspond to the standard number series R20 according to DIN232.
High efficiency Centrifugal fans with slippage characteristics
E/DRA… By using specially designed external rotor motors with high rotor resistance, we have developed a range of centrifugal fans with extremely high slippage character in conjunction with forward curved centrifugal impellers. The external rotor motor adjusts its operating behaviour to the respective loads and this changes the speed dependent on the total pressure. This is particularly advantageous in systems where resistances vary during operation such as, for example, with dirty filters, controlled dampers in the connection and disconnection of duct installations as well as for cleanroom applications.
Centrifugal fans with IEC standard motor and forward curved centrifugal impellers
ERN…

The high performance centrifugal fans of the ERN… series are suitable for the conveying of clean or slightly dusty air and slightly aggressive gas and vapours. They are not gas-tight. The permissible conveying medium temperature is between -30°C and 60°C.

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