Bell & Gossett, a xylem brand Wafer Orifice Flow Meters Circuit Sensor Flow Meter

The Circuit Sensor Flow Meter is a precision machined wafer-type orifice insert that is installed between standard 125, 150, 250 or 300 psi ANSI flanges, to monitor system flow with a minimum friction head loss. System flow is determined by obtaining a differential pressure across the flow meter orifice by sensing upstream and downstream pressures through the readout valves, then referring to the calibrated nameplate for the corresponding flow. Circuit Sensor Flow Meters are suitable for a maximum operating temperature of 250°F (121°C), and are equipped with RV-125A Readout Valves fitted with an integral EPT check valve designed to minimize system fluid loss during the monitoring process.