Submersible Pumps for Marine Applications

Reliable Pumping for Australia’s Coastal and Offshore Environments

At Tsurumi Australia, we understand the demands of marine and offshore environments. Our seawater-resistant submersible pumps are carefully designed to deliver powerful, long-lasting performance in harsh coastal conditions across Australia.

Whether you’re working on a shipyard, running a desalination plant, or managing sewage mixed with seawater, our pumping solutions provide the durability and efficiency you need.

What Are Marine Submersible Pumps?

Marine submersible pumps are sealed units designed to operate while submerged in liquid.

They combine motor and pump into one compact housing, ensuring safe and efficient operation below the waterline. Their robust design allows them to handle corrosive fluids like seawater and wastewater found in marine environments.

Why Submersible Pumps Are Ideal for Marine Use

Submersible pumps offer a range of practical advantages that make them particularly well-suited for marine environments, where durability, efficiency, and space-saving design are essential.

• Protect critical components from corrosion and physical damage
• Eliminate the need for priming
• Reduce noise and vibration
• Require minimal installation space

Key Applications in Marine Environments

Submersible pumps play a vital role in maintaining safe, efficient operations across a variety of marine and offshore environments. From commercial boat docking to coastal infrastructure and wastewater management, Tsurumi pumps are engineered to handle the challenges posed by seawater, organic waste, and harsh environmental conditions.

Commercial Marine Applications

In commercial marine settings, reliability and resistance to corrosion are non-negotiable. Tsurumi submersible pumps are widely used in shipyards and dry docks to manage water ingress, support maintenance operations, and enable smooth vessel servicing.

In Australia, the PN Series has become a go-to solution for boat sea pen docking, thanks to its proven performance in continuous seawater exposure with minimal maintenance requirements.

Coastal and Offshore Infrastructure

Coastal and offshore facilities require robust pumping solutions capable of operating around the clock in highly corrosive conditions. Tsurumi’s seawater-resistant pumps are ideal for desalination plants, providing dependable performance in water intake and discharge processes.

They’re also used on offshore platforms and floating facilities where space is limited, and uninterrupted operation is critical. The compact design and high resistance to saltwater corrosion make these pumps a reliable choice for harsh marine infrastructure settings.

Sewage and Wastewater in Marine Environments

Managing sewage and wastewater in marine environments requires pumps that can handle corrosive fluids and suspended solids with ease. Tsurumi’s range of submersible sewage pumps is used for pumping waste mixed with seawater, particularly in coastal buildings and treatment plants.

These systems also support industrial water management at ports, shipyards, and marine hubs, moving wastewater efficiently while resisting blockages and reducing maintenance demands.

Their ability to operate in corrosive and debris-heavy environments makes them an essential asset for marine wastewater operations.

Challenges of Pumping in Seawater

The Corrosive Nature of Seawater

Seawater is highly corrosive, especially to metals like iron and steel. Without protection, submersible pumps can experience:

• Rusting of internal components
• Blockages from mineral build-up
• Decreased efficiency and premature failure

Importance of Seawater-Resistant Features

To maintain pump performance and extend lifespan:

• Use corrosion-resistant materials
• Apply protective coatings
• Add galvanic anodes to slow down metal degradation

Tsurumi’s Solutions for Marine and Offshore Applications

Seawater-Resistant Pump Models

B & C Series Overview

Tsurumi’s B and C Series pumps are built to handle harsh marine conditions with:

• Cast iron impeller, suction cover and casings
• Optional galvanic anodes for additional corrosion resistance

PN Series for Sea Pen Docking

The PN Series is trusted in Australia for boat sea pen systems. These pumps have proven their durability in submerged conditions over long periods.

Seawater-Resistant Kits (Add-ons)

Many of our standard pumps can be upgraded with:

• Galvanic anodes
• Special cast iron impellers
  This optional kit helps achieve both extended service life and cost-efficiency, ideal for clients managing tight budgets.

Product Features That Enhance Marine Durability

To ensure long-lasting performance in corrosive marine environments, Tsurumi submersible pumps are equipped with a range of protective features specifically engineered to combat seawater exposure and extend operational life.

Galvanic Anodes

• Work by corroding in place of the pump’s metal parts (sacrificial protection)
• Reduce corrosion and prolong the pump’s lifespan
• Ideal for constant seawater exposure

Special Cast Iron Impellers

• Designed to resist corrosion and abrasive wear
• More affordable than full stainless-steel components
• Maintain high performance over time

Selecting the Right Submersible Pump for Your Marine Project

Key Considerations

• Fluid Type: Seawater, sewage, or a mix of waste fluids
• Flow Rate: Required discharge volume and head
• Solids Content: Presence of sludge, debris, or organic matter
• Site Conditions: Depth, salinity, exposure, and access

Customisation and Support from Tsurumi Pumps

• Standard pumps with optional corrosion-resistant kits
• Multiple impeller types to suit the material handled
• An expert team available across Australia to assist with selection and support

Why Choose Tsurumi for Marine Applications?

When operating in Australia’s demanding coastal and offshore environments, choosing the right pump can make all the difference. Tsurumi’s marine-ready submersible pumps are built with durability, efficiency, and long-term value in mind, backed by decades of trusted engineering and local support.

Trusted Engineering in Australia

Tsurumi’s pumps are purpose-built to handle the diverse and often harsh conditions found along the Australian coastline and offshore environments. With decades of experience in both marine and industrial pumping, Tsurumi has developed solutions that deliver consistent, long-term performance.

Our national network of distributors ensures that customers across all states have quick access to reliable products, expert advice, and responsive support, keeping operations running smoothly from shipyards to remote marine facilities.

Focus on Sustainability and Cost Efficiency

Tsurumi takes a practical, forward-thinking approach to sustainability. By using corrosion-resistant materials and robust construction, our pumps are designed to last longer and reduce the need for frequent replacements.

For customers looking to enhance their existing systems, our seawater-resistant kits provide a cost-effective way to upgrade without investing in entirely new equipment.

In addition, energy-efficient motor designs help reduce running costs while maintaining strong, consistent high flow rates, supporting both environmental and economic goals.

FAQs About Submersible Marine Pumps

Can I use a standard submersible pump in seawater?

Only if it’s fitted with corrosion-resistant components such as galvanic anodes and protective coatings. Standard pumps without these features will quickly degrade in seawater, leading to reduced performance and shortened service life.

For marine environments, it’s strongly recommended to choose models specifically designed or adapted for seawater exposure.

How do galvanic anodes protect a pump?

Galvanic anodes serve as sacrificial metal elements that corrode in place of the pump’s more critical components. By attracting corrosion, they help preserve the integrity of the motor housing, impellers, and other metal parts exposed to seawater.

Replacing anodes periodically is a simple yet effective way to extend the lifespan of your pump.

Which Tsurumi pump is best for sewage mixed with seawater?

Tsurumi’s B Series and C Series pumps are suitable for this application. When paired with the appropriate impeller type and an optional seawater-resistant kit, including galvanic anodes and special coatings, they provide excellent durability and solids-handling performance.

These pumps are designed to cope with the corrosive and debris-heavy nature of marine wastewater environments.

Do I need a special installation for marine submersibles?

Installation requirements vary depending on the site and application. Factors such as immersion depth, type of fluid, available power supply, and flow requirements all influence the setup.

Tsurumi’s team can provide tailored guidance on selecting the correct model and accessories, ensuring safe, efficient, and long-term performance in your specific marine setting.

Get Advice or a Quote

Whether you’re upgrading your marine infrastructure or managing waste at a coastal site, Tsurumi Australia has the pump for the job. Our local experts are ready to help you:

• Choose the right seawater-resistant model
• Configure your pump with add-ons for longer life
• Provide fast local support and spare parts

Contact our team today to get started or explore our full marine and offshore pump range.