Tsurumi KTVE21.5 Aluminium Alloy Automatic Submersible Drainage Pump for Foundation Works with Vortex Impeller

Foundation projects where water levels fluctuate unpredictably benefit from this automatic drainage pump, which incorporates electrode-based level control to manage pump operation. The relay unit automatically starts and stops the pump based on water contact, preventing dry-running and reducing power consumption. This mechanism is particularly valuable for foundation works where maintaining a clear, dry site is critical to construction progress.

The hydraulic assembly incorporates a ductile cast iron vortex impeller with high-gap geometry, capable of passing solids up to 8.5 mm. The flow path promotes efficient movement of abrasive particles through the pump during automatic drainage cycles, while the wear-resistant construction maintains performance in sand-laden water. This combination of automatic control and durable hydraulics ensures reliable operation in challenging site conditions.

Output is supplied by a 1.5 kW / 415v motor, which delivers a flow capacity of up to 420 L/Min and a maximum head of 20 m through a 50 mm discharge. These hydraulic characteristics provide stable pumping efficiency for automatic site drainage applications, with the motor capable of handling water containing up to 10% dry matter across a pH range of 5 to 9. The system maintains consistent performance throughout fluctuating water levels without operator intervention.

An oil chamber with a double-face mechanical seal and silicon carbide faces provides reliable sealing, supported by the Oil Lifter for consistent lubrication. The die-casted aluminium alloy body reduces weight for easy deployment, while the top-discharge, side-flow design ensures effective motor cooling during operation. Protection is provided by an anti-wicking cable entry block and a circle thermal protector integrated into the motor housing.

FEATURES

• Electrode control relay enables automatic operation and reduces power consumption by automatically preventing dry-running.
• Automatic dry-run prevention extends the operating life by eliminating the stress associated with air-pumping.
• Ductile cast iron vortex impeller with high-gap geometry facilitates the passage of solids up to 8.5 mm.
• Die-casted aluminium alloy body significantly reduces overall weight to simplify retrieval and deployment.
• Double-face mechanical seal with silicon carbide faces provides resistance to abrasion and thermal stress.
• Proprietary Oil Lifter maintains consistent lubrication of the mechanical seal faces even at low oil volumes.
• Top-discharge, side-flow design provides efficient motor cooling even when the motor is exposed to air during drawdown.
• Anti-wicking cable entry block protects the motor from capillary moisture incursion should the power cable be damaged.