Selection of gas flow meters | What are the commonly used models of low-pressure and high flow air flow meters

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What is the basis for selecting gas flow meters? Operating condition flow or standard condition flow? The difference between operating flow rate and standard flow rate is due to differences in pressure, temperature, and density. The range of a flowmeter is generally the standard flow rate. When selecting, provide the working conditions, flow rate, and operating conditions. The pressure under standard conditions is fixed, while the pressure under working conditions fluctuates at any time. You should still choose 1530Nm ³/h with a large volume!!

2. What are the commonly used models of low-pressure high flow air flow meters?

The commonly used low-pressure high flow air flow meters mainly include four types: thermal gas mass flow meters, Annubar/Velbar flow meters, LWQ series compressed air flow meters, and universal vortex flow meters.

1. Thermal gas mass flowmeter 1 Adaptation scenario: Suitable for low-pressure air metering with low flow rate, wide range, and large diameter, it can directly measure mass flow rate without additional temperature and pressure compensation, and has high sensitivity to low flow rate gases. Performance parameters: accuracy of ± 1.0% to ± 1.5% FS, diameter coverage of DN15 to DN2000, and plug-in models can be adapted to ultra large diameter pipelines for infiltration.

2. Anuba/Veliba flowmeter 1 Installation features: Plug in installation without pipe breakage, minimal pressure loss, suitable for measuring large-diameter air ducts, such as factory ventilation and large fan supply scenarios

2. Advantages and limitations: The pointer model can be read directly on site, has a simple structure, is temperature resistant and resistant to visible car spine pr

III. LWQ Series Compressed Air Flow Meter 1. Standard Basis: Developed in accordance with GB/T32021-2015 standard, integrated with temperature, pressure, flow sensors and intelligent flow integrator

2. Performance Features: Excellent low-pressure and high-pressure metering performance, flow range ratio of 20:1, good repeatability, accuracy up to 1.0 level, low pressure loss, low initial flow rate

3. Model Example: LWQ-25, nominal diameter DN25, starting flow rate ≤ 0.8m ³/h, flow range 2.5-25m ³/h.

4. Universal Vortex Flow Meter 1 Adaptation scenario: Suitable for low-pressure air metering scenarios with medium to high flow rates, stable flow rates, and relatively stable pipeline pressures. Performance features: no moving parts, low pressure loss, long service life, with temperature and pressure compensation, accuracy of ± 1.0% R, caliber range of DN15 to DN300. Model example: such as Duoqin DVS-DG15F11U, medium is air, DN15 caliber, body material is 304 stainless steel, working pressure is 1.6MPa, can display instantaneous and cumulative flow on site, supports 4-20mA output, 24V power supply, and ensures flow measurement range of 2.8-12m ³/h for sail accuracy.

3. Which laboratory gas flowmeter should I look for?

4. Selection of gas flow meters

Common gas flow meters include vortex street, orifice plate, float, swirl vortex, gas turbine, power bar, and bend pipe.. Vortex street can measure most gas media. It can measure gas volume flow rate and mass flow rate, and can be used for high temp

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