400QJ500-20/1 Stainless Steel Seawater Submersible Pump

8 Inch Seawater Desalination Submersible Pump for Marine & RO Systems

Product Overview

The 400QJ500-20/1 Stainless Steel Seawater Submersible Pump is a high-flow, corrosion-resistant pumping solution specially designed for seawater desalination and marine water transfer applications. Equipped with an 8-inch outlet, this pump delivers stable large-capacity water supply for desalination plants, offshore platforms, coastal engineering projects, and industrial seawater circulation systems.

Manufactured with high-quality stainless steel materials, the pump offers excellent resistance to saltwater corrosion, ensuring long-term reliable operation in harsh marine environments. Its compact submersible structure saves installation space while reducing noise and maintenance costs.

Key Features

Excellent Corrosion Resistance

Made of premium stainless steel materials suitable for seawater environments, effectively resisting chloride corrosion and extending service life.

High Flow Capacity

Model 400QJ500-20/1 provides large water flow output, ideal for seawater desalination pretreatment and large-scale water transfer systems.

Energy Efficient Operation

Optimized hydraulic design improves pump efficiency, reduces energy consumption, and lowers long-term operating costs.

Stable Continuous Performance

Designed for continuous-duty industrial applications with low vibration and reliable performance under demanding conditions.

Compact Submersible Structure

The motor and pump are integrated into a submerged structure, saving installation space and simplifying system layout.

Low Maintenance Requirements

Advanced sealing technology and durable construction reduce maintenance frequency and downtime.

Technical Specifications

Applications

The 400QJ seawater submersible pump is widely used in:

• Seawater desalination plants
• Reverse osmosis (RO) systems
• Offshore oil & gas platforms
• Marine engineering projects
• Coastal water intake systems
• Industrial seawater circulation
• Power plant cooling systems
• Port construction projects
• Aquaculture water supply systems
• Municipal seawater transfer projects

Advantages for Seawater Desalination Systems

In seawater desalination projects, stable water intake directly affects the efficiency of the entire system. The 400QJ500-20/1 pump is engineered to provide:

• Continuous large-flow seawater supply
• Stable pressure for pretreatment systems
• Reduced corrosion-related failures
• Long service life under high salinity conditions
• Reliable operation for RO desalination systems

Its stainless steel structure ensures safe and efficient operation even in highly corrosive marine environments.

Optional Customization

We provide customized solutions based on project requirements:

• Different voltage and frequency standards
• SS304 / SS316 / SS316L material selection
• Duplex stainless steel options
• Customized cable length
• Control cabinet integration
• Soft starter and VFD solutions
• OEM & private label support

Quality Control & Testing

Each seawater submersible pump undergoes strict testing before delivery, including:

• Flow and head performance testing
• Motor operation testing
• Dynamic balance inspection
• Leakage detection
• Electrical safety testing
• Material quality inspection

Our professional testing center ensures every pump meets international quality standards.

Why Choose Us

• Over 8 years of export experience
• Exported to more than 100 countries
• Professional pump manufacturing factory
• Complete testing and inspection center
• Fast delivery and technical support
• OEM & ODM service available
• International standard production management

FAQ

What material is recommended for seawater applications?

For standard seawater environments, SS316 or SS316L is recommended. For highly corrosive conditions, duplex stainless steel is available.

Can this pump be used for seawater desalination plants?

Yes. The 400QJ500-20/1 is specially designed for seawater desalination and marine water transfer systems.

Is the voltage customizable?

Yes. We can customize voltage and frequency according to your local standards and project requirements.

Do you provide control cabinets?

Yes. We can supply matching control panels, soft starters, and VFD systems.

Can you provide OEM service?

Yes. OEM and private label manufacturing services are available.