Repeat step 4 adjustable flow Gate valve by rotating counterclockwise from 1 to 3 around the end of the set. The experiments were set at 1, 1.5, 2, 3, 6.5 surround.
Repeat the 4 adjust the flow rate by rotating the Gate valve anticlockwise, an increase from 1 around another 3 value until given from this experiment was set 1 1.5 2,,,, 3 6.5 around.