GB 28381-2026 Minimum allowable values of energy efficiency and energy efficiency grades for blowers
GB 28381-2026 Minimum allowable values of energy efficiency and energy efficiency grades for blowers
Basic Information
Scope
This document specifies the energy efficiency grades, technical requirements, and test methods for turbine blowers and positive displacement blowers.
This document applies to general-purpose turbine blowers used for air convection with an exhaust pressure (gauge pressure) of 30 kPa to 200 kPa, or a compressor ratio of 1.3 to 3.0.
—— Mechanically supported centrifugal blowers with an inlet flow of 500 m3/h to 1,000,000 m3/h;
—— Axial flow blowers with an inlet flow of 60,000 m3/h to 1,000,000 m3/h;
—— Suspended supported centrifugal blowers with an inlet flow of 500 m3/h to 400,000 m3/h.
This document applies to single-stage Roots blowers used for air convection with an inlet temperature not exceeding 45 °C and a standard volume flow of 1 m3/min to 1,250 m3/min:
—— Positive pressure Roots blowers with a boost pressure of 9.8 kPa to 98 kPa;
—— Negative pressure Roots blowers with a boost pressure of 9.8 kPa to 49 kPa.
This document applies to screw blowers used for air convection with a standard volume flow of 2 m3/min to 200 m3/min and a boost pressure of 39.2 kPa to 245 kPa.