Turbine Flow Meter Principle of Operation
Consisting of three component assemblies, fitted inside a stainless steel body (locked with retaining rings), which has a Pick Up (variable reluctance sensor) fitted and come in a range of threaded, flanged and tri clamp styles.
The Rotor and shaft assembly (1 off) which is mounted in sleeve bearings, fitted inside Support assemblies (2 off) is turned by the kinetic energy of the flowing guild at an angular velocity, which in the linear range of the Flowmeter is proportional to the mean axial velocity of the fluid.
Turbine Flow Meter Design
Turbine flow meters use the mechanical energy of the fluid to revolve the rotor in the flow stream. Blades on the rotor are angled to transform energy from the flow stream into rotational energy. When the fluid moves faster, the rotor spins proportionally faster. Shaft rotation can be sensed mechanically or by detecting the movement of the blades. Blade movement is often detected magnetically, with each blade or embedded piece of metal generating a pulse. Turbine flow meter sensors are typically located external to the flowing stream to avoid material of construction constraints that would result if wetted sensors were used. When the fluid moves faster, more pulses are generated. The transmitter processes the pulse signal to determine the flow of the fluid.
Features
- Water and Wastewater
- Mining
- Gas Utility
- Aerospace
- Chemical
- Pulp & Paper
- Food & Beverages
- Pharmaceutical
- Power
- Oil & Gas
Specifications
- Working Temperature: 50ºC to + 282ºC
- Accuracy: +/- 0.5% of reading over Flow Range
- Repeatability: +/- 0.15% of reading
- Pressure Drop: Less than 0.5 bar at Maximum Flow
- Materials: All 316 Stainless Steel with ANC1A Rotor
- Bearings: Wear Resistant Tungsten Carbide Sleeve
- Pick Up: The Lx variable reluctance sensor is hermetically sealed for resistance to moisture and can withstand repeated thermocycling.
- The magnet is resistant to demagnetization.
- Output: is a low-level signal that ranges from 10 mV to 1 V peak to peak.
- A screened twin core signal cable should be used for connection to the Pick Up.
