Flow Measurement

Overview Basics Measuring Methods & Its Application Comparison

Primary Basic Accuracy Full Scale Accuracy Rate Accuracy Rangability Turndown Incompressible – Compressible Flow ACFM SCFM

Full Scale Accuracy

Rate Accuracy

Measuring Methods Head Type Flowmeters Mechanical Flowmeters Electronic Flowmeters Mass Flowmeters

Head Type Flowmeters Basic gh+v2/2+p/ρ= Constant

Different Type of Head Type Flowmeters Orifice Plate Venturi Flow Nozzle Pitot Tube Elbow

Orifice Plate Basic Equation :V=k*(h/D)0.5

Orifice for High Viscose Liquids

Orifice Service: Clean Liquids, Gases Steam,(no slurries or corrosive) Scale: Square Root Accuracy: 1% Full Scale Permanent Pressure Loss: High Cost: Low

Venturi & Flow Nozzle

Flow Nozzle Service: Liquids, Gases, Steam, High Velocity Flows Scale: Square Root Accuracy: 1% Full Scale Rangability: 3:1 Permanent Pressure Loss: High Cost: High

Venturi Service: Clean Liquids, Gases Steam Slurries and Dirty Fluids Scale: Square Root Accuracy: 1% Full Scale Rangability: 3:1 Permanent Pressure Loss: Low Cost: High

Pitot Tube

Averaging Pitot Tube

Variable Area Meters

Mechanical Flowmeters

Turbine Flowmeters

Turbine Meters

Rotary Flowmeters

Electronic Flowmeters

Vortex Flowmeters

Ultrasonic Flowmeters

Custody Transfer

Mass Flowmeters

Coriolis Flowmeters

Coriolis Flowmeters

Thermal Mass Flowmeters