USK Submersible Water Pump 0.75HP-4SDM310

The USK Submersible Water Pump 0.75HP-4SDM310 is a very common and popular choice for extracting water from boreholes and deep wells, offering a good balance of power and efficiency for various applications.

Here’s a comprehensive overview of its features and typical specifications:

Key Features and Specifications:

• Power: 0.75 HP (horsepower) or 0.55 kW (kilowatts). This is a step up from the 0.5HP models, providing more robust performance for higher flow rates or greater pumping depths.
• Model Name Breakdown:
  • 4SDM: Denotes a 4-inch (diameter) submersible multi-stage pump, meaning it’s designed to fit into boreholes with a minimum internal diameter of 4 inches (100mm). The “multi-stage” design utilizes multiple impellers and diffusers to build pressure and achieve higher pumping heights.
  • 3/10 (or 310): The “3” typically relates to a specific flow rate series (e.g., around 3 m³/h or 50 L/min at optimal efficiency). The “10” indicates the number of impellers or stages within the pump, which is a direct factor in its maximum head capability. More stages generally mean higher head.
• Submersible Design: The entire pump unit (motor and pump end) is designed to operate fully submerged in water. This offers several benefits:
  • Silent Operation: The water acts as a sound dampener, making operation very quiet.
  • Efficient Cooling: The surrounding water effectively dissipates heat from the motor, preventing overheating.
  • No Priming Required: Since it’s submerged, it’s always “primed,” eliminating the need for manual priming.
• Max Head (Maximum Delivery): For a 0.75HP 4SDM310 pump, the maximum head is typically around 56 to 62 meters (approximately 180-200 feet). This signifies its capability to lift water to considerable vertical heights.
• Rated Flow Rate: The flow rate will vary depending on the operating head (the height it’s pumping against). At its optimal efficiency point, it might deliver around 20-69 liters per minute (L/min), or 1.2 to 4.14 cubic meters per hour (m³/h). The flow rate decreases as the head increases.
• Minimum Well Diameter: Requires a minimum borehole/well diameter of 4 inches (100mm).
• Voltage: 220V-240V, 50Hz (single-phase), suitable for most residential and light commercial power supplies in Kenya.
• Motor RPM: Approximately 2850-2900 RPM.
• IP Rating: Typically IP68, indicating full protection against dust ingress and continuous immersion in water under specified conditions