Product review (1 stars): Mechanical Engineer Review
As a mechanical engineer I am familiar with what is required in a valve design to have variable flow from low to high setting. I am not pleased with the performance of these burners.  The ports in these valves are definitely of a design that does not allow continuously variable heat output from high to low fire.  There are individual ports in the valve for high, medium and low.  If someone is considering purchasing this range please be aware that you will not have a variable heat output from high to low.