Spray flow is substantially proportional to the square root of the spray pressure under the same medium. Any nozzle at a pressure under the pressure can calculate the flow of any pressure, a known spray flow is Q1, the corresponding pressure F1, the pressure is always F2, the unknown flow Qx, the relationship between the table for the table The theoretical coverage of the spray shape is calculated based on the angle of the spray and the distance from the nozzle. These values ​​are based on the assumption that the spray angle remains constant throughout the spray distance. In practical applications, the spray angle included in the table does not apply to the spray distance, the actual spray coverage data sheet.

The spray angle included in the table shows the approximate spray coverage based on water. In actual spraying, the effective spray angle is measured by the spray distance, if the required spray coverage is the key point, the specific spray coverage data. When the liquid is viscous than water, the spray angle formed is relatively small, depending on the viscosity, nozzle flow and injection pressure. The surface pressure drops the liquid of the rainwater to produce a relatively wide spray angle than the water listed.