Per different control system, there are fixed speed decanter centrifuge and variable speed control (VFD) decanter centrifuge.
Features of fixed speed control centrifuge
As the bowl speed and conveyer speed is fixed, cannot be changed, fixed speed control centrifuge is easy for operation and maintenance. And price lower compared with the same model VFD centrifuge.
Feature of variable speed control (VFD) decanter centrifuge
For the same model centrifuge decanter, VFD model cost more than fixed speed. Per International Explosion-proof standard, there should be positive pressured control panel for variable speed control for better cooling. It requests more professional on operators for the VFD decanter centrifuge.
For GN design VFD centrifuge, the bowl speed, conveyer speed and feeding pump flow are all flexible. Customer can change one or all of the 3 parameters to get the best separation performance in different jobsite. An and customer can change centrifuge parameter for getting the max. capacity centrifuge can reach.
Take GNLW363BG-VFD centrifuge for example, below steps show you how to find out the max. capacity of the centrifuge
1) For a bigger capacity, we should reduce the BOWL speed and increase CONVEYOR speed.
BOWL SPEED: 2000RPM
CONVEYOR SPEED: 40RPM
Pump running model set as AUTO
Then pump will running to the max. capacity it can reach.
2) Or you can try more settings to compare the capacity, with pump AUTO running:
a. Bowl 1600rpm, Conveyer 34rpm
b. Bowl 1800rpm, Conveyer 38rpm
3) The back drive motor is opposite rotating under low speed and high conveyer. If centrifuge shut down during running , reduce Conveyer speed.
4) For this centrifuge, the max. capacity will be not over 30cbm. As the pump max. capacity is 30cbm.