Biogas plants place specific demands on side channel blowers. In addition to airflow and pressure, the ATEX rating, moisture, installation environment, and potential corrosion exposure all play a significant role. The R40MDMOR 2.2 kW ATEX II 3GD T3 side channel blower delivers an airflow of 117 m³/h, a maximum positive pressure of +425 mbar, and a maximum vacuum of -350 mbar.
In biogas plants, side channel blowers perform a variety of gas and air handling tasks. Typical applications include gas recirculation within the digester, gas transfer between plant sections, conveying biogas to the end user, biological desulphurisation processes, as well as purging and auxiliary processes. The appropriate blower is not selected on the basis of general assumptions but according to the specific process requirements.
The R40MDMOR 2.2 kW ATEX II 3GD T3 | 117 m³/h | +425 mbar | -350 mbar | ATEX II 3GD T3 provides an airflow of 117 m³/h at 50 Hz, a maximum positive pressure of +425 mbar, and a maximum vacuum of -350 mbar. This makes the blower particularly suitable for applications requiring a compact airflow combined with a comparatively high pressure range.
A higher pressure capability can be especially important in biogas plants where long pipe runs, system resistance, gas lances, nozzles, or other installations must be overcome. Whether the blower is suitable for a particular process always depends on the specific system design. Factors such as the process medium, temperature, moisture content, piping system, pressure losses, operating cycle, and installation environment must all be taken into account.
The blower is rated ATEX II 3GD T3. Potentially explosive atmospheres may occur in areas associated with biogas systems. The ATEX rating allows the blower to be considered for appropriately classified hazardous areas. However, its actual suitability must always be verified based on the applicable zone classification, process medium, and operating conditions.
In addition to ATEX compliance, moisture within the process gas is a key consideration in biogas applications. Biogas may contain aggressive components, and during shutdown periods condensation can form inside the blower. This condensate may attack internal housing surfaces, impellers, stators, fasteners, and other components.
The performance of side channel blowers depends on precise internal clearances. If these surfaces are altered by corrosion, long-term effects on pressure, airflow, and overall operating performance may occur. For this reason, ATEX protection and corrosion resistance should always be considered separately in biogas applications. ATEX relates to explosion protection, whereas corrosion protection concerns resistance to moisture, condensation, and aggressive gas constituents.
For the R40MDMOR 2.2 kW ATEX II 3GD T3, optional features include special voltages in accordance with IEC 60038, surface treatment, and sealed versions. These options may be beneficial under demanding operating conditions but should always be evaluated on a project-specific basis.
The blower features an aluminium alloy housing and is designed for smooth, low-vibration operation. Additional technical features include an IE3 wide-voltage motor, IP65 protection rating, insulation class F, suitability for operation with a frequency inverter, and a standard thermal contact (PTO).
SKVTechnik provides a comprehensive information platform dedicated to the use of side channel blowers in biogas plants. It covers typical applications such as gas recirculation within digesters, gas-assisted digester mixing, biogas transfer to combined heat and power (CHP) units, biological desulphurisation, exhaust air treatment, gas transfer, as well as pipeline purging and inerting.
For an initial technical assessment, information such as the required airflow, positive or negative pressure, process medium, moisture level, temperature, installation environment, ATEX zone classification, and any required special configurations is particularly helpful. For complex technical applications, additional engineering support from the manufacturer FPZ can also be provided.
