Applications• Feedwater Flow Spray water Flow

• Main Steam Flow Soot Blower Steam Flow

• Make up Feedwater Flow

• Total Air Flow Primary Air Flow

• Fuel Oil Flow Fuel Gas Flow

• S

Units of Flow Measurement

• Water/Steam Tons/Hour• Air Nm3/Hr• Fuel oil Tons/Hour• Fuel Gas Nm3/Hr

Direct type Positive displacement type,Target flowmeter,Rotameter/area flow meter,Mass flowmeter.

Indirect type orifice plate.Ventury,Ventury nozzle and aerofoil

Segregation based on Priciple of Measurement

• Head Devices• Velocity Devices• Displacement Devices• Other Devices

Head Devices

• Pitot Tube• Orifice Plate• Venturimeter• Venturinozzle• Aerofoil Meter

Velocity Device

• Target Flowmeter• Rotameter/Area Flowmeter

Displacement Devices

• Turbine Flowmeter• Positive Displacement Meter

Bernoulli's equation

Ventury meter

DP Tappings

Flow Measurement with DP Transmitter

F - FLOW; A - Area of the Pipe; V - Velocity of Fluid; Cmeter – Meter Constant; Y - ; Aз – Area of the throat; (P - Pз); ρ – Density of the Fluid.

Flow Equation

F – Flow; C○ - Meter Constant; ( Pι –Pз) – Diff. Press. ;ρ○ - Density

Pressure Loss

Aerofoil

Flow vs Differential Pressure

DP to Flow

Pitot Tube

Re vs Types of Flowmwters

Target Flow Meter

Target Flow Meter

Area Flow Meter/Rotameter

Turbine Flowmeter

Turbine Flowmeter

Turbine Flowmeter

• High accuracy • Fast response time • Very compact • Ideally for low viscosities <500 cSt • Liquid and Gases • Custom designed meters available!

Turbine Flow Meters

• An excellent choice for low viscosity fluids• The moving fluids rotate the vaneTurbine.• The speed of the vane/Turbine is

proportional to the fluid velocity which is proportional to flow

PD Meters

• Ideal for high viscosities >50 cP • High Pressure • Batching & blending

Positive Displacement Meters

PD Meters

• The Flow Technology line of positive displacement flow meters utilize two patented impellers (gears) to measure precise volumes of liquid that pass through the flow meter as the gears rotate. These meters are specifically designed to accurately measure thicker fluids such as resins, polyurethanes, adhesives, paints, and various petrochemicals

PD Meters• Designed for operating pressures up to 3,000

PSI • Repeatability: +/-0.05% of rate • Linearity: +/-0.1% with linearizing electronics. • Line Size: 1/8 to 1 inch • Turndown: Up to 1000:1 • Viscosity Range: Up to 1,000,000 cP+ • Materials of Construction: Housing and cover

material are 316 SS • Operating Pressure: Up to 3000 psig

Magnetic Flowmeter

Magnetic Flow Meter

Magnetic Flowmeter

Coriolis Mass Flowmeter• Measurement of mass flow in viscous liquids and slurries • Using the Coriolis effect that causes a laterally vibrating

tube to distort, a direct measurement of mass flow can be obtained in a coriolis flow meter.

• As material flows through the mass Coriolis flow meter, the flow tube is vibrated and the resulting Coriolis forces/deflection are measured to determine mass flow rate and density.

• Process connections are flange ends and threaded ends.

• A wide range of analog or pulse output and local display options are available.

Coriolis Principle With fluid stationery

Coriolis PrincipleWith fluid moving

Straight Tube Mass Flow Meter

Mass Flow meter Construction

Thermal Mass Flow Meter

• A heated sensor element is cooled by the fluid flow.

• The result of the temperature difference is proportion to mass flow flow rate.

• The integral electronics provide frequency or analog signal proportional to flow

Comparison of Popular Flow Measurement Devices

FLOW MEASUREMENT INSTALLATION