Flow calculation basics
DP flow is derived from differential pressure, geometry, density and a validated discharge relationship.
TECHNICAL RESOURCES
DP Flow Meter Technical Resources
Use these resources to frame your application, compare primary-element families and prepare the inputs needed for defensible sizing.
Selection methodology
Evaluate turndown, pressure loss, straight runs, media behavior, maintenance and approval needs together.
Standards framework
Apply the correct part and edition of ISO 5167:2022 or the project-specific code.
QUICK SELECTION GUIDE
Match the meter to the dominant constraint
| Application condition | Starting point | Primary reason |
|---|---|---|
| Clean liquid, gas or steam | Standard orifice plate | Standards-based, economical |
| Low pressure-loss priority | Venturi tube | Strong pressure recovery |
| Viscous or solids-bearing media | Wedge flow meter | Open flow passage |
| Large clean pipe | Averaging Pitot tube | Low loss, insertion format |
| Large low-velocity gas duct | Double-Venturi Gas Flowmeter | More usable DP with a project calibration basis |
| Large duct with a non-uniform profile | Full-Section Matrix Flowmeter | Documented multi-point coverage |
| Limited straight-run availability | V-Cone | Center-body flow conditioning |
| Prepaid steam distribution | SmartBalance ProValve® | Integrated metering and control |
This guide is preliminary. Final selection requires complete process and mechanical data.
TECHNICAL ARTICLES
Deep-dive comparisons & selection resources
Orifice vs Venturi vs Balanced Flow MeterFull engineering comparison table with selection guidanceFull-Section Matrix Flowmeter GuideMulti-point architecture, grid selection, validation and maintenance basisDouble-Venturi Gas Flowmeter GuideCustom large-duct configurations, selection boundaries and validation routes
Ready to discuss your application?
Send your process data for an engineering review and a project-specific next step.
ISO 9001TS Licensed30+ PatentsSince 1989