500 m³/h High-Flow Submersible Pump and Submersible Well Pump with 8 m Low Head

The WLT-1230 (BL-1230) high-flow submersible pump is engineered for applications that require a large volume of water to be moved at a relatively low head. It delivers a rated flow of 500 m³/h at 8 m head and is powered by a 22 kW submersible motor.

This model is suitable for large-scale drainage, flood control, agricultural water transfer and other projects where pumping capacity is more important than high discharge pressure.

Material, voltage, frequency, outlet dimensions, cable length and installation accessories should be confirmed according to the specific project requirements.

At its rated operating point, the pump can deliver approximately:

• 500 cubic metres per hour
• 8.33 cubic metres per minute
• 138.9 litres per second
• 12,000 cubic metres per day under theoretical continuous rated operation

Actual output depends on the total system head, pipeline resistance, water level and installation conditions.

The rated head of 8 m makes this model suitable for moving large quantities of water over a limited vertical elevation. The required total head should include:

• Difference between the operating water level and discharge point
• Friction losses in the discharge pipeline
• Resistance from bends, valves and fittings
• Required pressure at the final outlet

If the actual system head is significantly higher than 8 m, the pump may not deliver the required 500 m³/h. The final selection should therefore be checked against the performance curve.

• Emergency floodwater drainage
• Municipal rainwater removal
• Agricultural irrigation intake
• Farmland and fishpond drainage
• River, canal and reservoir water transfer
• Construction-site dewatering
• Aquaculture water circulation
• Large storage-pond filling
• Industrial cooling-water transfer
• Low-lying area drainage

The pumped liquid must be compatible with the pump materials and hydraulic passage. Solids, fibres, sand content, salinity and corrosive chemicals should be confirmed before ordering.

Because the pump operates directly in the water, it does not require a conventional suction pipeline or suction priming. This reduces the suction-loss problems commonly associated with surface pumps.

Submerged installation also allows the pump to be used in pits, ponds, channels and temporary drainage areas with limited space for above-ground equipment.

The installation location must provide sufficient water around the pump inlet. Inadequate water depth or a poorly designed intake may create vortices, introduce air or reduce pump performance. Before installation, confirm:

• Minimum operating water level
• Required submergence depth
• Pump dimensions and weight
• Lifting and positioning method
• Discharge connection
• Pipeline support
• Intake clearance
• Access for inspection and maintenance

The 22 kW motor should be connected to a correctly rated control panel. Recommended protection includes:

• Overload protection
• Short-circuit protection
• Phase-loss and phase-sequence protection
• Abnormal-voltage protection
• Dry-running or low-water-level protection
• Motor-temperature protection when available
• Automatic liquid-level control

Please provide the following details to ensure an accurate pump selection:

• Required flow
• Vertical lifting height
• Horizontal delivery distance
• Pipeline diameter
• Minimum and maximum water levels
• Water quality
• Voltage and frequency
• Required cable length
• Fixed or portable installation
• Required quantity