
The HS3.75SL and HSZ3.75SL models are new additions to Tsurumi's best-selling HS series, designed for single-phase submersible applications requiring high drainage capacity. These pumps feature low head and high flow rates, specifically meeting the demands of the rental, civil engineering, and construction markets.
Like other products in the HS series, these submersible pumps are easy to operate, compact, lightweight, and durable, offering high portability and significantly improved maintenance convenience. Wear parts are made from abrasion-resistant materials to ensure exceptional durability.
Furthermore, the HSZ series is equipped with a simple float switch for automatic operation, effectively preventing dry running and reducing energy consumption, providing a smarter and more energy-efficient drainage solution.
Effectively prevents water ingress due to capillary action and blocks humid air from entering the motor housing, avoiding internal condensation.
Ensures longer service life by maintaining a clean and lubricated environment within the oil chamber. Compared to tungsten carbide, it offers 5 times greater resistance to corrosion, abrasion, and heat.
Effectively lubricates and cools the mechanical seal even at low oil levels, maintaining stable shaft seal performance and extending seal life.
Acts as a "dust seal," effectively protecting the mechanical seal from abrasive particles and enhancing durability.
Effectively prevents air lock, a common issue in vortex and semi-vortex pumps, and efficiently stirs sludge to ensure smooth operation.
Standard and automatic operation types have identical performance.

| Discharge Diameter mm |
Model (Standard Operation) |
Model (Automatic Operation) |
Output Power kW |
Phase | Starting Method | Solid Passage Diameter mm |
Quality (Weight) kg |
Rubber Insulated Cable Length m |
|---|---|---|---|---|---|---|---|---|
| 50 | HS2.4S | HSZ2.4S | 0.4 | Single Phase | Capacitor Start | 7 | 11.3 | 5 |
| 50 | HS2.75S | HSZ2.75S | 0.75 | Single Phase | Capacitor Start | 7 | 16.4 | 5 |
| 80 | HS3.75S | HSZ3.75S | 0.75 | Single Phase | Capacitor Start | 7 | 16.8 | 5 |
| 80 | HS3.75SL | HSZ3.75SL | 0.75 | Single Phase | Capacitor Start | 7 | 19.6 | 5 |