Turbine flow meter YFV1

volumefor waterfor oil

Overview
YUNYI liquid turbine flowmeter is a velocity-type precision flow measurement instrument. When low-viscosity liquids flow through the meter, the fluid’s kinetic energy drives the built-in precision turbine rotor to rotate. Its rotational speed is directly proportional to the fluid’s average flow velocity (volumetric flow rate). High-sensitivity non-contact magnetic or inductive sensors detect the rotational speed and convert it into a frequency/pulse signal output, enabling precise calculation of instantaneous and cumulative liquid flow rates. The product emphasizes high accuracy, excellent repeatability, fast response speed, and strong resistance to interference, making it suitable for trade settlement, cost control, and process monitoring.

Product Advantages

• High precision measurement: accuracy classes reported as high as ±0.5% R and even ±0.2% R in some configurations; typical ranges cited include ±0.5% to ±1% over a calibrated range.
• Wide turndown ratio: commonly in the range of 1:10 to 1:20, maintaining accuracy across a wide flow range.
• Exceptional repeatability: minimal repeatability error (typically better than ±0.1%).
• Rapid dynamic response: fast reaction to changes in flow, suitable for process control and batching.
• Stable output signal with strong interference resistance: generates frequency/pulse signals suitable for remote transmission and total volume measurement; enables simple connectivity to counters, PLCs and control systems.
• Compact, lightweight, and cost-effective: relatively small dimensions and light weight reduce procurement and installation costs.

Core Application Areas

• Petrochemical industry: trade transfer and distribution metering for light petroleum products (gasoline, diesel, kerosene), LPG metering.
• Food & beverage: sanitary-grade quantitative filling and cost accounting for water, alcoholic beverages, soft drinks, milk, edible oils, etc.
• Fine chemicals & pharmaceuticals: precise measurement and batch control for expensive solvents, additives and pharmaceutical solutions.
• Water treatment & irrigation: flow monitoring and trade settlement for raw and treated water; agricultural irrigation metering.
• Research & laboratories: reference meter for calibration of other liquid flow meters and precision experimental apparatus.

Principle of Operation
The meter contains a multi-bladed rotor (turbine) mounted on bearings. Flow kinetic energy rotates the turbine at a speed proportional to average flow velocity. A magnetic or inductive pickup coil outside the body detects blade passage and produces pulse/frequency output. Pulse rate corresponds to flow rate; pulse count gives totalized volume.

Ideal Applications & Limitations

• Ideal for clean, low-viscosity liquids: water, demineralized water, solvents, light fuels, alcohols.
• Also applicable to cryogenic liquids (LNG, liquid nitrogen, LPG), chemical process streams, and high-purity/sanitary liquids (3-A compliant designs available).
• Critical limitation: unsuitable for viscous, dirty, or abrasive fluids. Particles damage bearings/blades; high viscosity (>10–15 cSt) degrades accuracy and range.
• Upstream filtration is strongly recommended (commonly cited example: ~100 mesh) to protect the turbine.

Product Comparison (table)
Aspect | Liquid Turbine Meter | Positive Displacement (Oval Gear) | Electromagnetic Flow Meter
Principle | Velocity (turbine rotation) | Volumetric (fixed cavity displacement) | Faraday’s Law (electromagnetic induction)
Best For | Clean, low-viscosity, high-speed flows | High-viscosity, lubricating, or clean liquids | Conductive liquids, slurries and dirty fluids
Moving Parts | Yes (turbine rotor on bearings) | Yes (meshing gears/rotors) | No
Pressure Drop | Low to moderate (depends on design) | Higher (increases with viscosity) | Negligible (no obstruction)
Viscosity Impact | Severe degradation at higher viscosity | Unaffected or improved performance | None (measures conductive phase velocity)
Key Strength | Cost-effective precision for clean, fast flows | High accuracy with viscous fluids | Handles dirty/abrasive fluids; no pressure loss

Selection & Installation Guidance

• Selection checklist: evaluate fluid properties (viscosity is most critical), density, temperature, cleanliness, corrosiveness; confirm flow range (min/normal/max) and ensure meter covers required range above low-flow cut-off.
• Material compatibility: choose body/rotor/seal materials (SS304, SS316, Hastelloy, PTFE seals, plastics) appropriate to the fluid.
• Process conditions: verify operating pressure and temperature ratings for the selected model.
• Accuracy & outputs: select required accuracy class and output type (pulse, 4-20mA, digital protocols such as HART or Modbus).
• Installation best practices: always fit suitable upstream filtration; ensure fully developed, swirl-free flow profile (recommended ~10–15 pipe diameters straight upstream and ~5 diameters downstream; install flow conditioner if needed near pumps/elbows); typical installation is horizontal; if vertical, flow should be upward to keep rotor bearings lubricated; avoid cavitation and ensure sufficient backpressure.

Outputs & System Integration

• Typical outputs: frequency/pulse output for volume counting. Options and integrations may include 4–20 mA, HART, Modbus and other digital protocols for direct SCADA/DCS/PLC connectivity.
• Pulse outputs connect to batch controllers or PLCs; analog/digital outputs support monitoring and remote control.

Maintenance, Longevity & Calibration

• Primary wear parts: rotor bearings — life depends on fluid cleanliness, lubrication properties and operating speed.
• Maintenance: regular cleaning/replacement of filters and monitoring for increased noise/vibration or changes in meter factor indicating wear.
• Calibration interval: recommended recalibration every 1–3 years for critical applications depending on service conditions.

Standards & Certifications

• Accuracy and metrology standards referenced: ISO 4064 (water), API Chapter 5.3 (hydrocarbons), OIML R117.
• Hygienic/sanitary: 3-A, EHEDG, FDA-compliant materials for food/pharma applications.
• Safety/compliance: ATEX/IECEx (explosive atmospheres), CRN/PED (pressure equipment), NSF (potable water) are cited as applicable certifications.

caractéristiques / spécifications techniques

• Product type: Liquid turbine (velocity-type) flowmeter with turbine rotor and magnetic/inductive non-contact sensor.
• Accuracy classes: up to ±0.5% R; some mention of ±0.2% R capability; typical published ranges include ±0.5% to ±1% over calibrated range.
• Repeatability: typically better than ±0.1%.
• Turndown ratio: typically 1:10 to 1:20 (wide turndown).
• Response: fast dynamic response suitable for process control and batching.
• Output signal: frequency/pulse; available integration options include 4–20 mA, HART, Modbus and pulse outputs for PLC/SCADA.
• Suitable fluids: clean, low-viscosity liquids (water, solvents, light fuels, alcohols), cryogenic liquids (LNG, liquid nitrogen, LPG), sanitary/high-purity liquids (special designs).
• Unsuitable fluids: viscous (>10–15 cSt), dirty or abrasive fluids (particles damage bearings/blades).
• Filtration: upstream filter strongly recommended (example reference: ~100 mesh).
• Installation: straight pipe recommendations ~10–15D upstream, ~5D downstream; horizontal preferred; vertical upward acceptable.
• Materials: wetted parts options include SS304, SS316, Hastelloy, plastics; seals such as PTFE available for compatibility.
• Line sizes: range indicated from small bore (DN4) to large line sizes (DN250+) depending on model.
• Calibration: K-factor (pulses per unit volume) established by flow calibration; multi-point K-factor/linearity curve recommended for highest accuracy; recalibration interval commonly 1–3 years for critical uses.
• Applicable standards: ISO 4064, API Chapter 5.3, OIML R117, 3-A, EHEDG, ATEX/IECEx, CRN/PED, NSF.