Oil-free, high-speed turbo blowers with frictionless direct drive are an ideal fit for larger plants, as they are highly efficient, reliable, and designed to ensure a low total cost of ownership, often resulting in a payback of the investment cost over a short period of time. With a simple design and reliable operation, the latest generation of low-noise, low-vibration, low-pulsation tri-lobe blowers is capable of sweeping nearly six times the volume of air in a single revolution compared to its belt-driven, twin-lobe predecessors.Ĭentrifugal blowers: High-speed turbo blowers, multistage blowers, and multistage centrifugal blowers are primarily designed for low-pressure applications that require higher flow rates of over 5,000 m3/hr. Lobe blowers: Compared to screw technologies, lobe blowers attract a lower initial investment cost. They demand less energy because the internal compression concept offers higher efficiency derived from the design of its rotor elements. Up to 35% more energy-efficient than traditional lobe blowers, screw blower technology can cope with fluctuations in air demand and operate from 100% capacity to 25% with very little change in specific power requirement. If a blower is ISO 8573-1 (2010) Class 0 certified, it guarantees that the air is not contaminated by oil during the compression process. Oil-free air blowers are a wise choice as they ensure that no oil from the blowers will be added to the treatment processes. Screw blowers: When the focus is on running costs, oil-free screw blowers are the most suitable positive displacement technology. Low-pressure blowers are categorised as lobe, screw, centrifugal, and multistage blowers, and there are two types of positive displacement blower technologies which are widely used in aeration applications: screw blowers and lobe blowers. This article details the different low-pressure blower technologies available and explains how to select the right blower to deal with specific application process requirements. Therefore, in the face of rising energy costs, it is vital to select the right energy-efficient blower technology that can help to keep electricity costs down. Kirk Lyons, National Sales Manager Low Pressure at Atlas Copco Compressors, explains that up to 70% of the energy consumption in water and wastewater treatment plant operations is used by air blowers.
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