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China - Update GB Standard for Energy Efficiency for Blowers
This draft GB standard specifies the minimum allowable values of energy, energy efficiency levels, and test methods for turbine blowers and volumetric blowers.
This document applies to general purpose turbine blowers (including single-stage cantilever, single-stage double support, and multi-stage turbine blowers) with exhaust pressure (gauge pressure) ranging from 30 kPa to 200 kPa, or overall pressure ratio ranging from 1.3 to 3.0:
a) Mechanical supported centrifugal blower with an inlet flow rate of 500~1000000m3/h;
b) Axial flow blower with an inlet flow rate of 60000~10000000m3/h.
c) A suspended centrifugal blower with an import flow rate of 500~40000m3/h.
This document applies to single-stage Roots blowers with standard volumetric flow rates ranging from 1 to 1250m3/min, including positive pressure Roots blowers with pressure increases of 9.8 to 98kPa and negative pressure Roots blowers with pressure increases of 9.8 to 49kPa.
This document applies to screw blowers (including general purpose oil injected/oil-free single/twin screws) with a standard volumetric flow rate of 2 to 200m3/min and a pressure increase of 39.2 to 245kPa