Differential Pressure Differential Pressure FlowmeterFlowmeter

Venturi TubeVenturi Tube Flow NozzleFlow Nozzle

Differential Pressure Differential Pressure FlowmeterFlowmeter

Advantages:Advantages: Well known system of measurementWell known system of measurement VersatileVersatile Line size flexibilityLine size flexibility Inexpensive initiallyInexpensive initially Highly repeatableHighly repeatable East to maintainEast to maintain Economical to correct sizing mistakeEconomical to correct sizing mistake

Differential Pressure Differential Pressure FlowmeterFlowmeter

Disadvantages:Disadvantages: High installation costsHigh installation costs Moderate system accuracyModerate system accuracy An abrasive or sticky process will erode An abrasive or sticky process will erode

accuracy and increase maintenance costaccuracy and increase maintenance cost Moderate rangeabilityModerate rangeability High relative pressure lossHigh relative pressure loss

Turbine Flow MetersTurbine Flow MetersOverviewOverview

Uses flow to turn a turbine Uses flow to turn a turbine rotorrotor

Magnetic sensor transmits a Magnetic sensor transmits a voltage pulse to a processorvoltage pulse to a processor

Axial-vane rotor is free Axial-vane rotor is free turningturning

Rotor continuously moving Rotor continuously moving under pressure of the liquidunder pressure of the liquid

Accuracy in the range of +/- Accuracy in the range of +/- 0.25% with 10:1 turndowns.0.25% with 10:1 turndowns.

Turbine Flow Meters Turbine Flow Meters Common ApplicationsCommon Applications

Turbine flow meters are widely used Turbine flow meters are widely used for both liquid and gas applicationsfor both liquid and gas applications

Typical applications include:Typical applications include: Oil and gas, refining, chemical, Oil and gas, refining, chemical,

semiconductor, agricultural, semiconductor, agricultural, pharmaceutical, food beverage pharmaceutical, food beverage dispensing, photo development, process dispensing, photo development, process control, and morecontrol, and more