The Tsurumi TM series is a submersible pump for seawater applications — marine RAS, live seafood holding, hatcheries and aquarium life-support, along with bilge, vessel and general seawater transfer. All wetted metal components are titanium, which resists seawater corrosion better than any grade of stainless steel, and the lubricant is liquid paraffin rather than mineral oil, so a seal failure won’t contaminate the water around live stock.
Key Features
- All wetted metal components are titanium — corrosion resistance beyond any grade of stainless steel, built for permanent immersion in seawater, including warm-water sites where crevice corrosion shortens pump life
- Liquid paraffin lubrication instead of mineral oil — safe for live-holding systems, aquaculture and aquariums if a seal ever fails
- Dual silicon carbide mechanical seals, oil lifter and anti-wicking cable entry for continuous submersed service
- Single-phase 240 V models (0.25 / 0.4 kW) are RCM certified; three-phase models to 3.7 kW
- Automatic float-switch (TMA) versions available for unattended operation with dry-run protection
- Back pull-out design for easy inspection and maintenance
Applications
- Marine RAS, live seafood holding and hatcheries — seawater intake, transfer and drainage
- Aquarium life-support systems
- Seawater pumping — bilge and vessel duty
- Sewage treatment plants and construction wastewater drainage
- Waterscapes and ponds
- General water transfer
Technical Details
| Discharge Bore (mm) | Manual Model | Motor Output (kW) | Phase | Starting Method | Solids Passage (mm) | Max Flow (L/min) | Max Head (m) |
|---|---|---|---|---|---|---|---|
| 40 | 40TM2.25S | 0.25 | Single | Capacitor Run | 10 | 245 | 9.0 |
| 40 | 40TM2.25 | 0.25 | Three | D.O.L. | 10 | 245 | 9.0 |
| 50 | 50TM2.4S | 0.4 | Single | Capacitor Run | 10 | 295 | 12.0 |
| 50 | 50TM2.4 | 0.4 | Three | D.O.L. | 10 | 295 | 12.0 |
| 50 | 50TM2.75 | 0.75 | Three | D.O.L. | 10 | 355 | 15.0 |
| 50 | 50TM21.5 | 1.5 | Three | D.O.L. | 20 | 670 | 17.3 |
| 80 | 80TM22.2 | 2.2 | Three | D.O.L. | 20 | 710 | 19.5 |
| 80 | 80TM23.7 | 3.7 | Three | D.O.L. | 20 | 900 | 26.1 |
Max flow and max head are taken from Tsurumi’s 50 Hz performance curves — use the curve below to check your exact duty point.
Performance Curve
Downloads
Frequently Asked Questions
What’s the difference between the manual and automatic models?
Automatic (TMA) models carry an integrated float switch, so the pump starts and stops with the water level and won’t run dry — ideal for unattended sumps and holding systems. The video below shows how they work.
Will it really last in seawater?
Yes — titanium forms a self-repairing oxide layer in salt water, giving corrosion resistance beyond any grade of stainless steel. That’s what makes the Tsurumi TM suited to permanent installation in seawater intakes, sumps and live-holding systems, including warm-water sites.
Should I choose the TM, PN or PU series?
Pick the TM for anything sitting permanently in salt water. On freshwater drainage the semi-vortex PN series gives more head per kilowatt, and the vortex PU series passes solids to 46 mm without clogging.
Which model do I need?
It comes down to your duty point — flow, delivery head and pipe run. Send us those details and we’ll confirm the right model, price and lead time.
