The turbine meter is a popular displacement flow measuring device, which can be used in a wide range of industries for both liquids and gases. Turbine flow meters have the ability to measure wide flow ranges with good accuracy and at an economic price; their application is restricted only by the fact that they must be used with clean, non-corrosive fluids.
Turbine Meter Advantages
• Wide flow rangeability including low flow rates
• Turndown ratio is up to 35:1
• Good level of accuracy at an economic price
• Simple, durable construction
• Easy to install and maintain
• Flexible connection to flow instruments for flow control
• Wide variety of process connections
• Turbine meters can operate over a wide range of temperatures and pressures
• Low pressure drop across the turbine
• Provides a convenient signal output
Turbine Meter Limitations
• Requires constant backpressure to prevent cavitation
• Accuracy adversely affected by bubbles in liquids
• Turbine meters can be used with clean liquids and gases only (may need to install a strainer upstream to prevent damage from particulates)
• Not applicable for measuring corrosive fluids
• Requires a turbulent flow profile (consistent fluid velocity across the pipe diameter) for accuracy
• Sensitive to changes in fluid viscosity
• Require a straight run of pipe before and after the turbine meter to allow swirl patterns in the flow stream to dissipate
• May not function properly with high viscosity fluids where the flow profile is laminar
Turbine meters operate most effectively in applications with steady, high-speed flows.
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