Precise selection of vortex flowmeters 

        Vortex flowmeters are widely used in the measurement of steam, gas and liquid flow rates due to their simple structure, wide measurement range and high stability. However, different working conditions have different requirements for the performance of vortex flowmeters, and correct selection is crucial. This article summarizes the key factors for selecting vortex flowmeters to help you easily find a suitable solution.

        1. The material of the sensor is determined by the measured medium

      The corrosion resistance and applicability of vortex flowmeters depend on the material selection:

Ordinary liquids/gases (water, air): 304 stainless steel can meet the requirements and has a high cost performance.

Corrosive media (acids, alkalis, chemical fluids): 316L stainless steel or Hastelloy should be selected to improve corrosion resistance.

High-temperature steam (saturated steam, superheated steam): High-temperature resistant design (up to 400°C) is required, and the influence of thermal expansion should be considered.

        2. Selection of flow range and diameter

For small flow measurement: Select a small diameter (DN15-DN50) to improve measurement accuracy at low flow rates.

For large flow measurement: Select a larger diameter (DN80-DN300) to avoid excessive pressure loss due to high flow rates. 

LUGB Series Integrated Vortex Flowmeter with Temperature and Pressure Compensation

Wide Range Ratio Requirements: Select high-precision vortex flowmeters to ensure stable measurement at both high and low flow rates.

        3. Process Pressure and Temperature Impact on Selection

   High-pressure conditions (>1.6MPa): Use high-pressure type vortex flowmeters to ensure structural strength.

High-temperature media (>200℃): Adopt high-temperature compensation design to prevent sensor drift.

Low-temperature media (such as LNG): Require anti-freezing design to ensure stable operation in low-temperature environments.

       4. Output Signals and Communication Protocols

    4-20mA analog signal: Suitable for traditional PLC/DCS systems.

HART/RS485 communication: Supports remote debugging and data transmission, ideal for smart factories.

Pulse output: Applicable for metering and cumulative flow calculation.

       5. Installation Methods and Pipeline Vibration Impact

   Horizontal/Vertical Installation: Ensure full pipe flow and avoid bubble or impurity interference.

When pipeline vibration is significant: Choose anti-vibration type vortex flowmeters or install vibration damping devices.

Straight pipe section requirements: Typically, 10D before and 5D after the flowmeter (D is the pipe diameter) are required to ensure stable flow conditions.

       6. Explosion-proof and Protection Grades

   Flammable and explosive environments: Select explosion-proof types (Ex d/Ex ia) that comply with ATEX/IECEx standards.

Outdoor or humid environments: Choose IP65/IP67 protection grades to ensure water and dust resistance.

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