What is Flow?
Flow is the volume of liquid that passes through a pump in a given time period.
The flow of a pump is the amount of liquid that passes through the pump. There are two parts to a measurement of flow:
- Volume of liquid
- Time elapsed
Every measurement or expression of flow includes the volume of liquid and the time during which the volume passed through the pump. Common examples of flow units include:
- GPM: Gallons Per Minute.
- MGD: Million Gallons Per Day
- CFS: Cubic Feet Per Second
- M3/sec: Cubic Meters Per Second
- L/s: Liters Per Second
Every pump is designed to produce a certain amount of flow at a certain amount of head. This combined head and flow point is called the rated condition or guarantee point. For example, an end-suction pump might be provided with a rated condition of 1000 GPM at 100 Ft head or TDH.