Common Terms Of Water Meters

1. Speed type water meter: A water meter installed in a closed pipeline, composed of a moving element, and directly driven by the speed of water flow to obtain power velocity.

2. Positive displacement water meter: A water meter installed in a pipeline, consisting of a known volume of chambers filled and discharged with fluid, and a mechanism driven by the fluid, or simply a quantitative discharge water meter.

3. Overload flow rate (qs): The maximum usage flow rate of a water meter in a short period of time without damage, with a value of 1.25 times the commonly used flow rate.

4. Commonly used flow rate (qp): The optimal flow rate for water meters under normal working conditions, such as stable or intermittent flow.

5. Boundary flow (qt): The flow that occurs when the flow range is divided into two zones. The "high zone" and "low zone" are characterized by the maximum allowable error of each zone.

6. Minimum flow rate (qmin): The minimum flow rate required to be given by the water meter within the maximum allowable error limit. It is related to the numerical value of the water meter code.

7. Pressure loss: The decrease in pressure caused by the presence of a water meter in a pipeline at a given flow rate.