H2flow Controls
FlowVis®
20
Operation
9.2 Reading the Velocity Rate
FlowVis
®
includes a unique Velocity readout that is not found on any other
flow meter. The left-hand side of the scale has a reading of the flow rate, while
the right-hand side has a reading of the velocity rate.
In order to accurately read either the flow or velocity rate, please follow the
instructions described in the preceding section.
The color background of the velocity scale relates to the widely accepted
understanding by professionals in the Recreational Water industry, that the
velocity of water traveling through a pipe shall not exceed six feet per second on
the suction side of a pump or eight feet per second on the discharge side.
The background color shows a ‘step’ feature that differentiates the Suction (S)
and Discharge (D) areas. Note that not all models will show the ‘S’ and ‘D’ at the
top of the velocity scale. For these models, note that suction readings are on the
left and discharge readings on the right of the right-hand side (ft/s) side of the
scale.
IMPORTANT: The flow rate should never enter the ‘red’ area of the
scale for either configuration.
The velocity rate values are related to the specific pipe type shown at the bottom
of the scale.
