D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm, execution 3

Smoke exhauster series D 3,5 with electric motor Electric motor AIR 100 L4 4.0 Power kW 1500 Vol./Min, made of carbon steel.

This fan is designed for removing flue gases from small-capacity boiler units with output up to 1 t/h of steam, fueled by gas or fuel oil. The temperature of conveyed gases must not exceed 200 °C for models with ST3 grade steel impellers and 400 °C for those with heat-resistant 09G2S steel impellers.

Ambient temperature range: –40 °C to +40 °C.

The D 3.5M models are also used by enterprises for sanitary-technical purposes and are installed in metallurgical plants, CHPs, etc.

The smoke exhauster D 3,5 consists of the following components, available separately:

• Spiral rotating fan casing
• Impeller
• Frame (mounting base)
• Collector
• Electric motor Electric motor AIR 100 L4 4.0 Power kW 1500 Vol./Min

The welded spiral casing of the D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm smoke exhauster is made from carbon steel. The impeller is of overhung design with forward-curved blades. The assembly includes the base frame, collector, and a three-phase AIR asynchronous motor with squirrel-cage rotor (2.2 or 3.0 kW, 380 V/50 Hz).

In configuration No. 3, the impeller is mounted on the drive shaft via a bearing assembly. Designed for continuous operation, durability is achieved through reinforced casing walls and hard-alloy blade surfacing. Blade inlet/outlet angles are optimized for uninterrupted gas flow.

The unit can be configured for right- or left-hand rotation; the casing orientation is adjustable within a 0–270° range.

General information about D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm smoke exhausters:

• Single-sided intake
• Spiral rotating casing
• Forward-curved blades
• Number of blades: 20
• Rotation direction: right or left (viewed from motor side)

Applications of D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm smoke exhausters:

These units are used in power engineering as flue-gas removal equipment, designed for steam and hot-water boilers with up to 25 t/h (20 MW) output, burning various fuels. They require an effective ash collection system. They are built for continuous indoor and outdoor operation in moderate climates. Start-up is allowed at casing temperatures no lower than –30 °C. Maximum flue gas inlet temperature: +180 °C.

Also suitable for use on gas/fuel oil-fired boilers and in industrial installations in metallurgy, chemical, and power sectors, especially in gas and dust removal systems.

D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm smoke exhausters are used in:

• Power stations
• Gas/fuel oil boiler systems
• Steam and hot-water boilers
• Sanitary-industrial applications

The maximum temperature of conveyed media must not exceed 250 °C.

Operating principle of D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm:

The fan operates by transferring rotational energy from the impeller, mounted on the motor shaft, to the gas. The mixture enters through the collector into inter-blade channels, where centrifugal force pushes it outward. The flow is then deflected by 90° and discharged through the spiral casing.

Operating conditions for D 3.5 w/motor AIR 100 L4 4 kW 1500 rpm:

• Carbon steel body—max flue gas temperature: +200 °C
• Start-up allowed when inlet air ≥ –30 °C
• Ambient temperature: –40…+40 °C
• Vibration intensity ≤ 2 mm/s RMS from external sources
• Solid particle content ≤ 2 g/m³ in flue gases

Casing orientation for right-hand (PR) and left-hand (LV) rotation (view from intake side):

a) right-hand rotation