Seawater magnetic flow meter

Regarding the selection requirements for a DN150 seawater electromagnetic flowmeter, the following is a detailed analysis and 

recommendations, combining technical parameters with customization requirements:

Core Parameter Compatibility Analysis

Diameter and Pressure Compatibility

DN150: Standard nominal diameter, meeting most seawater pipeline requirements.

Pressure Rating:

The domestic standard pressure is 5 MPa, while the customer requested 4 MPa, which is fully compatible with a safety margin.

For higher pressures (e.g., 10 MPa), a custom high-pressure sensor is required, with a price increase of approximately 15%-20%

 (due to material and process upgrades).

Electrode and Lining Materials

Titanium electrodes: Excellent seawater corrosion resistance makes them the preferred material for seawater measurement. No 

additional price is required (included in the standard configuration).

Lining Materials:

PTFE (polytetrafluoroethylene): Highly corrosion-resistant, suitable for most seawater applications, standard configuration.

PFA (soluble polytetrafluoroethylene): More resistant to high temperatures and chemical attack. This material is recommended for

 seawater containing special chemicals, with a price increase of approximately 8%-12%. Connection Method

American Standard Flange (150 lb):

National standard flanges are commonly used in China. Switching to American standard flanges requires custom flanges and seals, 

with a price increase of approximately 10%-15% (due to increased mold and processing costs).

Delivery time may be extended by 3-5 business days.

Power Method

Battery Power:

Requires a low-power converter and lithium battery pack, with a price increase of approximately 20%-25% (compared to 220V AC power).

Battery Life: 5-8 years of continuous operation (depending on flow signal frequency).

Advantage: No wiring required, suitable for remote sea areas or mobile measurement scenarios.

Installation Requirements:

Ensure a 5D straight pipe section at the front and a 3D straight pipe section at the rear (D is the pipe diameter) to avoid eddy current

 interference.

Seawater pipelines must be thoroughly cleaned to prevent impurities from damaging the electrodes and lining.

Calibration and Maintenance:

Calibrate every 1-2 years (return to the factory or use a portable calibrator is recommended).

Regularly check battery voltage (for battery-powered models) and signal stability. Alternatives:

If your budget is limited, consider a split-type electromagnetic flowmeter (with separate sensor and converter), which can reduce initial 

costs by approximately 10%-15%.

For higher accuracy (±0.2%), dual-frequency excitation technology is available, with a price increase of approximately 20%.

For further inquiries or a detailed quote, please contact:

Email: sales01@cxflowmeter.com

WhatsApp: +86 180 4984 1995