Does anyone out there use a 3 phase motor with VFD to run a liquid ring(water cooled) vaccum pump? I was told that it is not recommended, due to the pump not working correctly at slower speeds?
Does anyone out there use a 3 phase motor with VFD to run a liquid ring(water cooled) vaccum pump? I was told that it is not recommended, due to the pump not working correctly at slower speeds?
9500 on vaccum with 3½ x 14 Lapierre Turbo 2
One very wonderful wife
8 post CDL 20+
4 little sugarmakers in training aging between 13 and 15 years old
One nutty household
Due to their design, some liquid-ring pumps will not maintain a vacuum at less than 80% their rated speed, so if a VFD is used, it should be programmed to only operate over a narrow range. Therefore a VFD has limited usefulness in those applications.
Dr. Tim Perkins
UVM Proctor Maple Research Ctr
http://www.uvm.edu/~pmrc
https://mapleresearch.org
Timothy.Perkins@uvm.edu
Thank you for the reply, Dr Perkins.
9500 on vaccum with 3½ x 14 Lapierre Turbo 2
One very wonderful wife
8 post CDL 20+
4 little sugarmakers in training aging between 13 and 15 years old
One nutty household