Orifice Plate Flow Meters Series PR-61/PR-62 / PR-69/PR-25 - Tecfluid
Measurement of Flow from an Orifice Plate
Measurement Principle
Measurement of the differential pressure, created by an orifice of fixed cross sectional area, which is a function of flow rate.
Operation
An orifice plate in a pipe creates a differential pressure under the flow of a fluid. The differential pressure is a function of the flow rate, with a quadratic relationship. A connection between the high and low pressure sides of the orifice will create a smaller flow which is proportional to the main flow, with a quadratic
relationship. The measurement of the smaller, created flow with a series 6001, 6002, 6009 or SC-250 variable area flow meter provides a measurement of the total flow through the pipe. These VA flow meters are calibrated according to the orifice size to provide a direct reading of the main flow. The flow meters can be fitted with a transmitter to provide a 4-20 mA signal.
