Tsurumi 50TMA21.5 Titanium Automatic Seawater Pump for Marine Drainage with Semi-Vortex Impeller

Automating marine sump drainage and shipboard dewatering requires a high-head pumping solution with integrated control. Ideal for unattended seawater transfer, this pump is engineered for handling seawater and corrosive liquids in demanding marine environments without manual monitoring. Its combination of titanium and resin metallurgy ensures a long service life where standard stainless steel equipment would succumb to rapid oxidation.

Flow capacity reaches up to 660 L/Min with a maximum head of 19.5 m, powered by a 1.5 kW / 415v three-phase motor. Automatic start-stop cycles based on liquid levels ensure energy efficiency in deep shipboard sumps. This induction motor is continuous-duty rated through a 50 mm discharge bore for stable performance.

The semi-vortex impeller enables 20 mm solids passage, ensuring that particles move through the pump casing with minimal hydraulic wear. This arrangement is ideal for automated transfer of liquids bearing organic matter, as the semi-vortex design minimizes impeller contact to prevent obstruction. The design maintains high operational efficiency while resisting the abrasive effects of coastal sand.

Mechanical integrity is supported by a titanium shaft and frame, with dual mechanical seals with SiC+SiC lower faces for seawater resistance. Protection is provided by a circle thermal protector built into the motor housing and an anti-wicking cable entry block that safeguards the motor from moisture. The unit utilizes non-toxic liquid paraffin as a lubricant, making the pump safe for automated marine applications.

FEATURES

• Automatic operation via level control provides hands-free management of shipboard sumps.
• Titanium and resin construction offer outstanding corrosion resistance for aggressive marine drainage.
• Semi-vortex impeller configuration enables a 20 mm solids passage, reducing wear on internal components.
• High-head performance reaching up to 19.5 m allows for effective vertical transfer in deep shipboard sumps.
• Double-face mechanical seal with SiC lower faces provides superior protection against abrasive seawater particles.
• Patented Oil Lifter technology keeps the mechanical seal faces lubricated even if the oil volume falls to low levels.
• Circle thermal protector built into the motor housing proactively interrupts the circuit during electrical overload.
• Anti-wicking cable entry block uses a molded rubber seal to prevent water from entering the motor through capillary action.