Chemical wastewater flowmeter | Correct selection and application of flowmeter - Tangshan Dafanghui Instrument

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DateTime 10/24/2026 Show 67

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1. Purchase of sewage Doppler flowmeter

2. Correct selection and application of flowmeter - Tangshan Dafanghui instrument

The correct selection of flowmeter needs to be comprehensively considered based on factors such as measurement medium, working environment, and accuracy requirements. The electromagnetic flowmeter of Tangshan Dafanghui instrument is suitable for conductive liquids (such as acid and alkali solutions, sewage, etc.), and the ultrasonic flowmeter is suitable for homogeneous fluids (such as tap water, industrial wastewater, etc.). The specific selection needs to be determined according to the pipe diameter, installation conditions, and maintenance requirements.

1. Classification and selection of flow meters Core elements Flow meters can be divided into electromagnetic flow meters, ultrasonic flow meters, differential pressure flow meters, rotary flow meters, etc. according to their working principles; According to the measuring medium, it is divided into liquid flow meters and gas flow meters. When selecting, the following factors should be considered: measurement of medium characteristics: conductivity, presence of solid particles, viscosity, corrosiveness, etc. Working environment: pipeline pressure, temperature, installation space (such as underground coal mines or on the ground), explosion-proof requirements. Accuracy and Range: Choose the appropriate accuracy level (such as 1.0 or 1.5) according to the process requirements. Maintenance convenience: whether it supports online installation, maintenance free design, etc.

2. Selection and Application of Electromagnetic Flowmeters 1 The working principle is based on Faradays law of electromagnetic induction. When a conducto

Chemical wastewater flowmeter
r moves in a magnetic field, it generates an induced electromotive force, which is proportional to the fluid velocity and magnetic induction intensity. 2. Applicable medium and conditions for conductive liquids: conductivity ≥ 25 μ s/cm (such as acid, alkali, salt solution, mud, slurry, sewage, tap water, etc.). Restrictions: The content of ferromagnetic substances and bubbles in the medium should be low to avoid affecting measurement accuracy. The measuring tube needs to be filled with liquid and regularly cleaned of scaling. Non conductive media prohibited: such as pure alcohol, pure acetone, oil, etc.

3. Typical products and scenarios LZD127 (A) mining explosion-proof and intrinsic safety electromagnetic flowmeter: suitable for underground coal mines, with explosion-proof and intrinsic safety characteristics. Measure conductive liquid or liquid-solid two-phase media (such as slurry, wastewater).

III. Selection and Application of Ultrasonic Flowmeters 1 The working principle is based on the "speed difference method", which measures the liquid flow rate inside a circular pipeline through multi pulse technology, signal digital processing, and error correction technology. 2. It is suitable for medium balance and condition homogeneous fluids: suspended solids content<10g/L and particle size<1mm (such as tap water, clean water, sewage, industrial wastewater). Pipeline requirements: For metal or non-metal pipelines, the outer wall and inner lining materials should be of uniform texture and tightly adhered. Mining scenario: LCZ-803 (B) mining explosion-proof and intrinsic safety type suitable for underground coal mines

3. Sensor type and characteristics Plug in sensor: suitable for liquid flow measurement w

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