Radial-flow impeller M series

high temperature-resistantATEXaluminum

Overview
The centrifugal fans in the M model range with an aluminium impeller are particularly versatile and are suitable for different applications, for example, with high mechanical requirements and at high temperatures. They can be used in air conditioning and refrigeration technology, in railway operations or in drying plants. The geometry of the impeller allows it to be used both as a free-running impeller and in a spiral housing. This allows high static pressures to be achieved in conjunction with 2-pole motors.

Product specification
The single-ended extracting, backward-curved motor impellers in the M model range are intended for use without spiral housing. Available in dimensions of 225 to 500 mm. This allows for volume flow rates of up to 5,500 m³/h and static pressures of up to 2,100 Pa.

Properties & special features

• Versatile model range with different wheel widths for applications with demanding mechanical requirements, such as railway systems or high temperatures in drying plants.
• Only motor impellers available, no housing fans.
• Suitable for use at high mechanical loads and elevated temperatures.
• Also available with ATEX and IECEx certification for potentially explosive applications.

Motor concepts

• External rotor motors: AC technology

Explosion protected version

• Available in seven sizes (315 – 630 mm)
• Anti-static surface finish thanks to powder coating in black (RAL 9005)

Explosion protection: additional details

• Only motor impellers available, no housing fans
• Temperature class T3/T4
• Equipment group IIB
• External rotor motor (AC)
• EPL: Gb / Gc
• Zone 1 / Zone 2
• Motor ignition protection type: Ex eb
• Fan ignition protection type: Ex h (constructional safety “c”)
• Suitable for ambient temperatures: -20 to +40/+60 °C
• Temperature impeller up to +80 °C
• Certificates: ATEX (and IECEx options available)

Applications

• Air conditioning and refrigeration technology
• Railway operations
• Drying plants
• Other applications with high mechanical requirements and/or high temperatures

Technical characteristics / specifications

• Product type: Single-ended extracting, backward-curved motor impeller (motor impeller RH)
• Impeller material: Aluminium
• Standard dimensions: 225 mm – 500 mm (series overview)
• Explosion-protected sizes: 315 mm – 630 mm (explosion protected version)
• Maximum volume flow: up to 5,500 m³/h
• Maximum static pressure: up to 2,100 Pa
• Motor technology: External rotor motors, AC
• Design: Free-running impeller and compatible with spiral housing for high static pressures
• Temperature class (explosion versions): T3 / T4
• Equipment group (explosion versions): IIB
• EPL (explosion versions): Gb / Gc
• Zones (explosion versions): Zone 1 / Zone 2
• Motor ignition protection (explosion versions): Ex eb
• Fan ignition protection (explosion versions): Ex h (constructional safety “c”)
• Ambient temperature range (explosion versions): -20 °C to +40 / +60 °C (depending on configuration)
• Impeller temperature rating: up to +80 °C
• Surface finish (explosion versions): Anti-static powder coating (black RAL 9005)
• Certificates: ATEX (and IECEx options for explosive atmospheres)