ATEX Centrifugal Fans

ATEX Centrifugal Fans

Suitable for a wide range of potentially explosive environments, our range of ATEX Centrifugal fans features over 32 ranges of explosion proof fans. The correct ATEX centrifugal fan will protect in the case of an explosion from potentially dangerous gases and dusts by ensuring the temperature rating is suitable and will not result in an explosion. Our expert team are certified to supply ATEX fans and their necessary components in line with the relevant ATEX Directives.

Please note that we cannot supply an ATEX fan without first recognising that you have undertaken a thorough risk assessment to determine the ATEX rating of the equipment you require. This is in line with ATEX Directives instructions that places an emphasis on the end user being responsible for their ATEX assessment. There are many independent consultants who can carry out your survey to ensure you receive the safest and most effective industrial ATEX fan for your applications ATEX gas and dust zone. ATEX fans can be manufactured from semi conducting polypropylene, fabricated steel with copper or aluminium non-sparking components, cast aluminium or in stainless steel.

For more information or to discuss your ATEX application with one of our fan integration experts call 01782 349 430 or contact us with your query using the link below

Why ATEX Centrifugal Fans?

Centrifugal fans are the most versatile type of fan given the multiple applications they can serve. Having similar rpm than axial fans and a similar size, the advantage of centrifugal fans is that they can offer a higher pressure than axial fans. Our ATEX centrifugal fan collection is one of the largest of all the UK ATEX fan suppliers, by working with our international fan manufacturing partners Casals Ventilation in Spain, we can supply the best ATEX Certified fan for your application.
In centrifugal or radial fans, the air is driven by an impeller that intakes through the central part and supply it through the blades. In this section you will find low pressure centrifugal fans (Pe up to 70mmwc approx.), medium pressure centrifugal fans (Pe from 70 to 250mmwc approx.), and high pressure centrifugal fans (Pe greater than 250mmwc). At the same time, centrifugal fans can be radial blade or straight blade, with forward curved blades or backward curved blades.
Explosion Proof Fan Design

Understanding Key ATEX Directives:

99-92-EC ATEX 137 (formerly 118a) is often referred to as “The Users Directive”, is concerned with safe working conditions and is implemented in UK law by the H&S executive in the form of the Dangerous substances and Explosive Atmospheres regulation or DSEAR.

ATEX 137 requires the end user to define what equipment manufacturer can lawfully supply

94/9/EC ATEX 95 (formerly 100a) is often referred to as “The Manufacturers Directive” is concerned with ATEX product compliance, The legislation enables the equipment manufacturer to supply product that meets or exceed the minimum requirements of the end users DSEAR risk assessment.

ATEX 95 requires the equipment manufacturer to supply safe and lawfully suitable products

ATEX Motors

In line with the above, manufacturers will generally select the type of motor required to meet the regulations but clients may choose to over specify the motor for added security. Our industrial team of fan integration specialists can help to select the correct fan for your application.

Ex d is Cat.2 flameproof i.e not sparking but a spark induces flame cannot escape the motor

Ex nA is Cat.3 non-incendive i.e anti-sparking in normal operation, but not flame proof. 

ATEX Zones

If an explosive atmosphere of flammable substances is specified the following zones may exist. You are advised to use an independent consultant to determine the zone protection you require.

Category 2 -Zone 1 Gas – Zone 21 Dust – Present Intermittently where an explosive mixture may be present occasionally in normal operation.

Category 3 – Zone 2 Gas – Zone 22 Dust – Present Abnormally where an explosive mixture is not expected to be present in normal operation or will only be present for a short amount of time.

Read the official ATEX Directive here

ATEX Temperature Classes Explained

Hazardous area equipment is classified according to the maximum surface temperature produced under the maximum operating capacity at an ambient temperature of 45°C , or as otherwise specified. The standard classifications are below and highlight the lowest temperature a which a gas, vapour or dust will be ignited. For example if a potentially hazardous explosive gas is hydrogen, then all equipment used must meet the T1 rating, meaning that all equipment used must not have a surface temperature of greater than 450°C. Anything that can generate a hotter surface temp of greater than 450°C must not be used as this will increase the likelihood of an explosion by igniting the hydrogen in the atmosphere. Please advise the temperature class when enquiring about an ATEX centrifugal fan to ensure we can select a product accurately.

T1     450°C
T2     300°C
T3     200°C
T4     135°C
T5     100°C
T6     85°C

High Pressure ATEX Centrifugal Fans

  • Fan made of Fe360 sheet. The fan paint finish is a Qualicoat polyester powder coating stoved at 200ºC, with an average film thickness of 70 microns.
  • Average heat resistance of coating is 180ºC with peaks of 200ºC.
  • High efficiency simple inlet backward impeller with self-cleaning system made of Fe360 sheet statically and dynamically balanced.
  • Temperature Class 2: Impellers are painted with polyester primer that resists temperatures up to 300ºC.
  • ATEX standard asynchronous motor.
  • ATEX certified according to the specified zone; 1 or 2.
  • Squirrel-cage motor with class F insulation.
  • Manufactured with standard voltages: 230/400V 50Hz in three phase motors up to 4kW and 400/690V 50Hz for higher powers.
  • Standard orientation LG270.

NIMAX ATEX Centrifugal Fan with Backward Curved Impeller

  • Medium pressure centrifugal fan with direct coupling.
  • Reinforced housing made of carbon laminated steel, protected against corrosion by powder coating polyester resin RAL 5010.
  • Finish C3.
  • Self-cleaning turbine and reinforced impeller with high-performance backward (reaction) blades made of carbon laminated steel dynamically balanced to minimise noise and vibrations. Black painted RAL 9005
  • ATEX standard asynchronous motor.
  • ATEX certified according to the specified zone: 1 or 2.
  • Class F insulation.
  • Manufactured with standard voltages: 230/400V 50Hz in three phase motors up to 4kW and 400/690V 50Hz for higher powers.
  • Motor with feet (B3) supported on motor support foot.
  • Models of size 500 and above are supplied with a front support foot, for the other models the front support foot is optional.
  • Available in the following orientations (to be indicated on order): LG0, LG45, LG90, LG135, LG180; LG225, LG270, LG315, RD0, RD45, RD90, RD135, RD180; RD225, RD270, RD315.
  • Maximum working temperature in continuous: Environment: 60ºC.
  • Temperature class 2 – 6 depending on model.

MBX ATEX Centrifugal Fans - Medium Pressure

  • Rolling steel sheet housing.
  • Completely joined or welded housing.
  • Simple inlet forward curved impeller made of aluminium sheet.
  • Polyester powder finishing coat.
  • Inlet spark proof ring made of copper or aluminium.
  • ATEX standard asynchronous motor. ATEX certified: II2G Ex d, Ex e / II3G Ex nA. IP55 protection,  and class F insulation.
  • Manufactured with standard voltages: 230/400V 50Hz in three phase motors up to 4kW and 400/690V 50Hz for higher powers.
  • Standard orientation: LG270.
  • T2-6 depending on model

Applications

Most of our ATEX certified centrifugal fans are suitable for ventilation in environments classified as ATEX.

We advise that you always speak to an independent consultant who will conduct a survey to determine accurate gas and dust zones, temperature classes and the ATEX rating required to ensure safe and efficient operation of your fan.

  •      Paint booths
  •      Collection of dust
  •      Food industry dryers
  •      Food processing
  •      Incineration
  •      Odour control in industry
  •      Indoor / outdoor pollution control
  •      Big buildings
  •      Malls
  •      Factories / Industrial buildings
  •      Warehouses
  •      Extraction of smoke
  •      Boilers and ovens
  •      Manufacture and treatment of chemical products
  •      Tunnels, underground stations

ATEX Centrifugal Fans in This Range

AAVA AAVC & AAVM High Pressure Centrifugal Fans

Backward curved self-cleaning impeller designed to achieve high air pressure, ATEX versions

AATZA AATVP & AATVA High Pressure Belt Driven Fans

Belt driven straight blade and centrifugal impellers that achieve high air pressure, ATEX versions

MTZM Medium Pressure Belt Driven Radial Fans

Belt driven centrifugal fans with straight blade impellers for material handling, ATEX versions.

NIMUS & NIMAX Medium Pressure Centrifugal Fans

NIMUS and NIMAX fans with air flows of up to 88,000m³ per hour and impeller sizes between 311mm and 1402mm.

AAX High Pressure Centrifugal Fans

High pressure centrifugal fans with cast aluminium impellers and steel sheet housing.

AAZA High Pressure Centrifugal Fans

Manufactured from Fe360 sheet with high efficiency straight blade impellers resisting high temperatures.

AAVP High Pressure Centrifugal Fans

High pressure fans with Fe360 sheet inlet backward impellers, statically and dynamically balanced.

MBGR Medium Pressure Centrifugal Fans

Medium pressure fans made of Fe360 sheet with dynamically balanced single inlet backward impellers.

MBRM Medium Pressure Centrifugal Fans

MBRM Medium Pressure Fans made of Fe360 sheet with a Qualicoat polyester powder coating.

MBRU Medium Pressure Centrifugal Fans

MBRU medium pressure fans made from Fe360 sheet with a polyester powder coating finish.

MBX Medium Pressure Centrifugal Fans

MBX medium pressure centrifugal fans with simple inlet forward curved impellers made of aluminium.

MBZM Medium Pressure Radial Fans

Medium pressure with straight radial blade impellers designed for solid material transport including textiles.

PRESTUR Medium Pressure Centrifugal Fans

PRESTUR medium pressure fans with direct coupling and reinforced housing made of carbon steel.

PREXTUR Medium Pressure Centrifugal Fans

Medium pressure fans with direct coupling and reinforced housing made of carbon laminated steel.

AAVG High Pressure Centrifugal Fans

High Pressure Centrifugal Fans with high efficiency simple inlet backward impellers.

MAX Medium Pressure Centrifugal Fans

Medium pressure centrifugal fans with Cast aluminium housing and a polyester powder coat finish.

MBCA Medium Pressure Centrifugal Fans

Medium pressure centrifugal fans with highly efficient, simple inlet forward curved impellers.

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