Water industry applications involve complex water qualities (including suspended solids and corrosive substances) and variable operating conditions (high/low pressure, large/medium/small pipe diameters). Equipment selection must adhere to the core principles of "high adaptability, high precision, and ease of operation and maintenance." The following are scientific selection solutions for specific scenarios:
Key aspects: raw water influent metering, process flow monitoring (coagulation/sedimentation/filtration, etc.), clear water tank effluent metering, and pipeline water distribution flow monitoring. - Flow meter selection: - Raw water/sewage applications: Electromagnetic flow meters are the preferred choice. They are suitable for conductive media with a conductivity ≥5μS/cm, have strong corrosion resistance, and an accuracy range of ±0.2% to ±0.5%. This technology conforms to ISO 9104:1991 (Electromagnetic flow meter performance standard) and has been applied in a municipal water plant in Melbourne, Australia, achieving accurate low-flow metering. - Clean water metering: Turbine flow meters (accuracy ±0.5%) or time-difference ultrasonic flow meters (accuracy ±0.5%) are ideal for clean water applications. - Large diameter pipes (DN>500): Clamp-on ultrasonic flow meters can be installed without cutting the pipe, and the cost is only 60% of that of electromagnetic flow meters of the same diameter. - Level gauge selection: - Clear water tank/sedimentation tank: Ultrasonic level gauge (non-contact design to prevent contamination, measurement error ≤ ±3mm). - Sludge tank: Radar level gauge (corrosion resistant, moisture resistant, protection level ≥ IP67, meets ATEX 2014/34/EU requirements for hazardous areas).
1.2 Application Scenarios of Water Supply Pumping Stations: Stable Control and Efficient Operation and Maintenance
Key aspects: monitoring of pump station inlet flow, regulation of booster pump outlet flow, linkage control of sump level, and pipeline pressure matching flow regulation. - Flow meter selection: - Standard operating conditions: Online electromagnetic flowmeter (suitable for high-pressure environments up to 40MPa, compliant with ASME B31.3 process piping standards). - Upgrade Project: Insertion Ultrasonic Flow Meter (no pipe opening required, suitable for DN300 and above pipes, with significant cost advantages). - High-pressure outlet: Vortex flow meter (high pressure resistant, ensuring stable measurement of pressurized water flow, FM certified, suitable for industrial applications). - Level gauge selection: - Water collection tank: float-type level gauge (simple and reliable structure, suitable for shallow water areas, and cost only 30% of radar level gauge). - Buffer tank: Submersible level gauge (accurate deep water measurement, IP68 protection rating, suitable for humid environments, compliant with UL 61010-1 safety standard).




