Oil-free screw blower "ZS Series"

Based on the implementation guidelines of the construction technology review certification project by the Japan Sewage Works Association, we have obtained a construction technology review certification for the "Atlas Copco ZS Blower" technology. 【Technology Name】 Atlas Copco ZS Blower (Oil-Free Positive Displacement Screw Blower) 【Purpose of Development】 It is said that the blowers used for aeration in sewage treatment plants account for more than 40% of the total power consumption of the facility. Traditionally, positive displacement blowers have been used for low air flow, while turbo blowers have been primarily used for high air flow. Positive displacement blowers have the characteristic of being suitable for air flow control since the air flow is proportional to the rotational speed, but they have low efficiency. On the other hand, turbo blowers can achieve relatively high efficiency at high air flow, but they have many auxiliary components, making the equipment complex, and there are constraints on air flow control operation to prevent surging. To address these issues, we developed the Atlas Copco ZS Blower (Oil-Free Positive Displacement Screw Blower), which has high overall isentropic efficiency and comprehensive efficiency, minimal efficiency drop during partial load operation, fewer auxiliary components due to its packaged design, ease of maintenance and installation, and no occurrence of surging.