SUBMERSIBLE SEAWATER-RESISTANT DEWATERING PUMPS_IB115-B

Product catalog summary

Introduction
Tsurumi's submersible seawater-resistant dewatering pumps are essential for waterfront development and aquaculture facilities. Japan's extensive coastline has driven Tsurumi to develop pumps that withstand harsh marine conditions, focusing on economic efficiency by using standardized materials.

Seawater-Resistant Features
The pumps can be equipped with a seawater-resistant kit, including a galvanic anode and a special cast iron impeller, to enhance longevity and cost-effectiveness. The galvanic anode protects the pump body by corroding preferentially, while the special cast iron impeller protects the motor shaft.

Corrosion Mechanisms
Metal corrosion in seawater is influenced by the metal's potential. Bimetallic corrosion occurs when metals of different potentials contact, leading to the corrosion of the lower potential metal. Crevice and pitting corrosion are also concerns, especially in stainless steel, which requires a protective chromium oxide film to resist corrosion.

Corrosion Tests
Tests show that without protection, stainless steel components can suffer significant corrosion. The use of galvanic anodes and special cast iron impellers significantly reduces corrosion, with the impeller needing replacement every few years depending on conditions.

Seawater-Resistant Kit Components
The kit includes galvanic anodes, a seawater-resistant special cast iron impeller, and other components like gray cast iron hose couplings and stainless steel eye bolts for specific models.

TM-Series Pumps
Tsurumi's TM-series pumps, made of titanium and resin, offer high corrosion resistance and are available in various motor outputs and phases.

Model Specifications
The document provides detailed specifications for various pump models, including motor output, phase, dimensions, weight, and starting methods. Performance curves illustrate the relationship between capacity and total head for different models.

Conclusion
Tsurumi's seawater-resistant pumps are designed for durability and efficiency in marine environments, with options for customization to extend service life. Regular maintenance, including the replacement of galvanic anodes and impellers, is essential for optimal performance.

Catalog excerpts

SUBMERSIBLE SEAWATER-RESISTANT DEWATERING PUMPS

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Seawater pumps are indispensable to waterfront development projects and aquaculture facilities. Japan is a maritime nation with the sixth longest coastline in the world. Tsurumi has performed field tests in various marine construction projects under severe conditions over many years, in collaboration with general contractors, and applied the obtained know-how to developing submersible seawater-resistant pumps. Tsurumi also considers economic efficiency important and, therefore, designs pumps with “as many standardized materials as possible.” Tsurumi’s standard pumps can be combined with a seawater-resistant...

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SUBMERSIBLE SEAWATER-RESISTANT DEWATERING PUMPS_IB115-B-3

TSURUMI Seawater-Resistant Dewatering Pumps Seawater-Resistant Special Cast Iron Impeller While the pump is running, the galvanic anode does not protect rotating parts. In seawater applications, the materials of the shaft and impeller must be carefully matched to avoid shaft corrosion and expensive repairs. After long years of research, Tsurumi developed an exclusive “seawater-resistant special cast iron impeller” suited to protect the shaft against corrosion by seawater. Closed Impeller Tsurumi’s standard pumps can be combined with a seawater-resistant kit (optional) that adds a “galvanic anode”...

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SUBMERSIBLE SEAWATER-RESISTANT DEWATERING PUMPS_IB115-B-4

Model Selection Discharge Bore Starting Method Solids Passage Cable Length Motor Output * If the pump is installed and operated under water level below C.W.L., it may result in corrosion of parts which are not submerged. *2 Dry weight excluding galvanic anodes and cable 1 C.W.L.: Water level for continuous pump operation with effective functioning of all the galvanic anodes Tsurumi also offers submersible seawater pumps, the TM-series. Seawater Pumps All the wetted parts of this pump are made of titanium and resin, which provides the highest corrosion resistance to seawater. The TM-series is...

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SUBMERSIBLE SEAWATER-RESISTANT DEWATERING PUMPS_IB115-B-5

We reserve the right to change the specifications and designs without prior notice. The OO series and model OO are indicated with our series/model codes in this catalog. Your Dealer TSURUMI MANUFACTURING CO., LTD.© 2021 TSURUMI MANUFACTURING CO., LTD. Printed in Japan IB115-B NPC-X-C-Y

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