Tsurumi Pump Submersible Systems

Tsurumi engineering innovations: Oil Lifter and motor protection

Tsurumi submersible pumps incorporate the patented Oil Lifter mechanism designed to stabilize mechanical shaft seal lubrication. Even if lubricant levels drop inside the oil chamber, the rotating device channels oil directly across upper and lower silicon carbide seal faces.

This design prevents dry friction overheating and extends service life in arduous continuous pumping operations.

The electrical cable entrance utilizes an anti-wicking block where each conductor is molded in polymer compound. If the outer cable jacket suffers mechanical damage, moisture cannot travel through conductor strands into the motor enclosure.

Miniature thermal motor protectors guard against thermal overload, phase failure and impeller blockage.

Heavy-duty dewatering in mining: KTZ series engineering

The three-phase KTZ line is engineered for tough dewatering duties in open-pit quarries, tunnels and deep foundation pits. The top discharge side-flow configuration directs pumped fluid along the motor housing, ensuring efficient cooling even during extended partial immersion.

High-chromium iron semi-open impellers withstand rigorous abrasive wear.

Models rated from 7.5 to 22 kW feature internal seal pressure relief ports that isolate mechanical seals from high hydrostatic heads encountered in deep sump installations. Ductile iron discharge bends can be oriented vertically or angled to prevent hose kinking during mobile dewatering tasks.

Slurry pumping and sand handling: GPN series design

For heavy sand, bentonite slurry and dredging sediment transfer, the GPN series employs four-pole and six-pole low-speed motors up to 37 kW.

A durable high-chromium agitator is mounted on the extended drive shaft, vigorously stirring settled solids into a pumpable fluid mixture before entering the hydraulic suction intake.

The thick-walled volute body and replaceable suction wear plates protect structural components against aggressive erosion. Low rotational speeds substantially reduce hydraulic wear rates when handling high-density slurries across aggregate processing and slag reclamation basins.

Corrosion-resistant solutions: TM titanium and PU series

The TM series utilizes pure titanium metallic components and reinforced engineering resin to handle corrosive seawater and brine in marine aquaculture and cooling water loops.

Titanium exhibits outstanding resistance against chloride pitting and chemical erosion, while keeping pump weight minimal for mobile deployment.

The PU series combines grade 304 stainless steel with resin components and a vortex impeller. The semi-vortex hydraulic mechanism allows stringy materials and solids to pass without choking the pump volute.

The seal chamber is filled with food-grade liquid paraffin, ensuring ecological safety in aquatic environments.

Submersible wastewater aeration: TRN series aerators

Self-aspirating TRN aerators operate on hydrodynamic suction principles for biological wastewater treatment.

As the semi-open rotor spins inside the mixing chamber, it generates a high-vacuum zone that draws atmospheric air through an intake pipe without requiring an external air blower or compressor.

The aerator produces fine bubble dispersion with high oxygen dissolution efficiency throughout the aeration basin. The resulting convective liquid flow maintains sludge suspension, preventing anaerobic sedimentation in industrial equalization basins and biological treatment lagoons.

Maintenance protocols and spare parts selection

Preventive maintenance of Tsurumi pumps centers on regular inspection of lubricant condition inside the mechanical seal chamber. Emulsified oil indicates seal wear, requiring timely replacement of silicon carbide dual mechanical seals and rubber O-ring seals.

Impeller clearances can be adjusted using factory shims.

Spare parts selection is based on the metal pump nameplate indicating exact model designation, serial number and production year. Exploded views and engineering data sheets verify impellers, suction plates, shafts, bearings and oil lifters for dependable overhaul and reassembly.