Explain the G-Factor or the Mean
To meet a G-Factor constraint, a concept that was originally based on very low-speed and therefore very high-torque rake designs, your choices are to either utilize a less efficient impeller design of older or outdated technology or be forced into a much larger gearbox torque to meet this artificial torque ceiling. This can only be achieved by selecting very slow speed agitation using a hydrofoil. The result is that the G-factor constraint has the effect of adding cost without adding value. The development of hydrofoil impellers, which produce high flow and low shear has made the "G Factor", as a parameter of design, an obsolete concept for flocculation.
The "G Factor" is defined by the equation:
= 444[(HP/1000)/m]0.5 sec -1
The "G-FACTOR" parameter is still encountered for both RAPID or FLASH MIXERS as well as FLOCCULATORS. When it is specified, it would be prudent to identify what is meant by its value, what impeller technology the factor is based upon, or its source.
Engineers are looking for an edge. If the G-factor is blindly applied as a factor of design, it has the unintended consequence of driving up the bottom line without adding value.