525 m³/h Flow 350 m Head 1000 kW Power Stainless Steel Deep Well Submersible Seawater Pump

The 500QJH525-350-1000kW stainless steel deep well pump is a high-power multistage submersible pump designed for projects requiring a rated flow of 525 m³/h and a rated head of 350 meters.

Driven by a 1000 kW water-filled submersible motor, this pump can be evaluated for large-scale industrial water supply, deep groundwater extraction, mine water systems, municipal infrastructure and high-elevation water transfer.

The stainless steel grade, motor voltage, frequency, cable specification and starting method must be selected according to the water analysis, electrical grid and installation conditions.

The rated flow and head describe the specified operating point. Actual performance depends on the dynamic water level, pipe diameter, pipeline length, elevation difference and hydraulic losses.

The 500QJH525-350-1000kW uses multiple impeller stages to generate the pressure required for a rated head of 350 meters.

For this type of high-power project, pump head should not be selected according to well depth alone. The total dynamic head should include:

• Vertical difference between the pumping water level and discharge point
• Variation between static and dynamic water levels
• Friction loss through the discharge pipeline
• Local losses from valves, elbows and fittings
• Required pressure at the final outlet
• Possible changes in the operating water level

Selecting excessive head may increase power consumption and cause the pump to operate outside its recommended range. Insufficient head may prevent the system from reaching the required flow. A complete hydraulic calculation should therefore be completed before production.

The pump can be manufactured using different stainless steel grades according to the pumped liquid.

SS304 can be considered for general clean-water applications with limited chloride content and mild corrosion conditions.

SS316 and SS316L provide improved corrosion resistance for industrial water, mildly saline water and certain corrosive environments. The actual chloride concentration and temperature must still be evaluated.

Duplex 2205 offers higher mechanical strength and improved resistance to chloride-related corrosion. It can be evaluated for demanding industrial and coastal water projects.

Super duplex 2507 may be considered for severe marine environments, high-chloride water and offshore applications.

The final material should be determined using:

• Chloride concentration
• pH value
• Liquid temperature
• Dissolved solids
• Sand or suspended particles
• Expected operating hours
• Required service environment

The description "stainless steel pump" does not mean that every stainless steel grade is suitable for seawater.

The pump is driven by a 1000 kW water-filled submersible motor. Clean water inside the motor supports cooling and bearing lubrication.

Before commissioning, the motor filling condition should be checked according to the operating instructions. The motor must remain sufficiently submerged during operation to maintain external cooling.

The electrical configuration should be confirmed according to:

• Site voltage and frequency
• Available transformer capacity
• Grid starting-current limitations
• Power-cable length
• Installation depth
• Permitted voltage drop
• Control and protection requirements

Because this is a high-power motor, the starting system and electrical protection should be designed as part of the complete pumping system. The voltage should not be assumed from the model number.

The 500QJH525-350-1000kW stainless steel well pump may be evaluated for:

• Large-scale groundwater extraction
• Industrial raw-water supply
• Municipal water-supply projects
• Mine water supply and drainage
• High-elevation water transfer
• Reservoir-to-plant water transfer
• Water-treatment facilities
• Power-station water systems
• Industrial cooling-water supply
• Large agricultural irrigation projects
• Coastal water intake with a suitable material
• Seawater intake with verified material selection

Final suitability depends on the liquid, installation structure, required operating point and electrical conditions.

The pump is normally installed vertically and operates completely submerged. Before manufacturing and installation, the following information should be confirmed:

• Well or installation diameter
• Static water level
• Dynamic water level
• Minimum operating water level
• Pump installation depth
• Total pump-set length
• Discharge-pipe diameter
• Pipeline material and length
• Lifting and support arrangement
• Cable route and cable length
• Non-return valve position
• Available lifting equipment

The installation structure must support the weight of the complete pump set, discharge pipe, cable and water column.

For a high-power pump, lifting points, connection components and installation procedures should be reviewed before the equipment arrives at the project site.

The control system should be configured according to the motor power and local electrical network. Depending on the project, the system may require:

• Overload protection
• Short-circuit protection
• Phase-loss protection
• Phase-sequence protection
• Voltage monitoring
• Motor temperature monitoring
• Water-level monitoring
• Dry-running protection
• Starting-current control
• Pressure and flow monitoring

A variable-frequency drive should only be selected after confirming motor compatibility, cooling conditions and the permitted operating-speed range.

To verify whether the 500QJH525-350-1000kW is suitable, please provide:

• Required flow in m³/h
• Required total dynamic head
• Liquid type and complete water analysis
• Static and dynamic water levels
• Installation depth
• Well or intake dimensions
• Pipeline diameter and total length
• Elevation of the discharge point
• Site voltage, frequency and phase
• Available transformer capacity
• Required stainless steel grade
• Power-cable length
• Daily operating hours
• Starting and control requirements

Before delivery, the pump configuration should be checked against the confirmed technical agreement. Inspection may include:

• Pump model and rated parameters
• Motor power, voltage and frequency
• Stainless steel grade
• Pump and motor dimensions
• Cable specification
• Electrical insulation
• Direction of rotation
• Supplied accessories
• Packaging and lifting points

Performance testing and project documentation should be agreed upon before production. Actual test values should be recorded rather than replaced with general statements such as "high efficiency" or "stable performance."