crude oil flow meter DN80

『crude oil flow meter DN80』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)

# Water Flow Meter for Desalination Plant: Selection Guide **Quick Answer:** For seawater desalination, use electromagnetic flow meters for brine and product water, and Coriolis meters for chemical dosing. Electromagnetic meters work with conductivity above 5 µS/cm and handle pipe sizes from DN15 to DN1200. Silver Instruments supplies magnetic flow meters with PTFE or rubber linings for SWRO plants in Southeast Asia and the Middle East. --- ## Why Desalination Needs Specialized Flow Meters Desalination plants measure three main fluid types: seawater intake, brine discharge, and fresh product water. Each has different conductivity, temperature, and pressure requirements. Most engineers skip this part: they pick a general purpose flow meter and expect it to last. In practice, a meter that works fine for clean water fails within months on brine lines. We have seen this on customer sites many times. A seawater reverse osmosis plant in Vietnam ordered a standard vortex flow meter for brine monitoring last year. The sensor failed after 6 weeks because the Hastelloy C-22 was not enough for the concentrated salt at 45°C. They switched to a magnetic flow meter with a PTFE liner. No issues since then. --- ## Electromagnetic Flow Meters for Desalination Electromagnetic flow meters are the most common choice for SWRO plants. They have no moving parts and handle dirty water, brine, and chemical solutions. **Key specifications:** | Parameter | Typical Value | |-----------|---------------| | Conductivity | >5 µS/cm (seawater is 50,000 µS/cm) | | Accuracy | ±0.5% of rate | | Pressure rating | PN10 to PN40 | | Temperature | -10°C to +80°C (standard) | | Lining | PTFE for chemicals, rubber for brine | | Electrode | Hastelloy C- crude oil flow meter DN80

276 or titanium | For a 10,000 m³/day desalination plant in Saudi Arabia, the engineer specified DN400 magnetic meters with rubber lining for product water. The pressure was 8 bar, temperature 35°C. They needed a 4-20 mA HART signal to the DCS. This is a standard configuration we supply. **When to use electromagnetic meters:** - Seawater intake lines - Brine discharge - Product water - Filter backwash - Chemical dosing with conductivity above 5 µS/cm --- ## Coriolis Mass Flow Meters for Chemical Dosing For antiscalant, coagulant, and chlorine dosing, Coriolis meters give direct mass flow. The chemicals are expensive, so accurate dosing saves money. A Coriolis meter for dosing antiscalant at 0.5–2.0 kg/h needs sensitivity below 0.1 kg/h. Silver Instruments supplies DN3 to DN15 Coriolis meters for this application. **Real example:** A food grade desalination plant in Australia used a Coriolis meter for sodium bisulfite dosing at 1.2 kg/h. The pressure was 6 bar, temperature 25°C. They chose a DN6 Coriolis meter with ±0.1% accuracy. The plant manager told us the payback was 8 months from chemical savings. **When to use Coriolis meters:** - Antiscalant dosing (0.1–5 kg/h) - Coagulant dosing - Chlorine injection - Acid or base addition - Direct mass flow measurement required --- ## Other Flow Meter Types for Desalination ### Ultrasonic Flow Meters Use for non invasive measurement on large pipes. Clamp on ultrasonic meters work on DN50 to DN1000 pipes without cutting the line. Accuracy is ±1–2% of rate. One client in UAE used portable ultrasonic meters for spot checking flow on 8 different brine lines. They did not want to shut down the plant to install inline meters. ### Vortex Flow Meters Only for clean steam

『SILVER Official Website SERVICE』