USK Submersible Water Pump 1HP-4SDM313

The USK Submersible Water Pump 1HP-4SDM313 is a powerful and very popular choice for deep well and borehole water extraction, particularly for domestic, agricultural, and light industrial applications that require higher head or flow rates than smaller pumps.

Here’s a detailed breakdown of its features and typical specifications:

Key Features and Specifications:

• Power: 1.0 HP (horsepower) or 0.75 kW (kilowatts). This provides a significant boost in performance compared to the 0.5HP and 0.75HP models, enabling it to pump water from greater depths and/or deliver a higher volume.
• Model Name Breakdown:
  • 4SDM: Indicates a 4-inch (diameter) submersible multi-stage pump. This means it’s designed to fit into boreholes with a minimum internal diameter of 4 inches (100mm). The “multi-stage” design uses multiple impellers and diffusers (13 in this case) stacked in series to build pressure and achieve very high pumping heights.
  • 3/13 (or 313): The “3” typically refers to a specific flow rate series (e.g., around 3 m³/h or 50 L/min at optimal efficiency). The “13” indicates the number of impellers or stages within the pump. More stages directly correlate to a higher maximum head.
• Submersible Design: The entire pump (motor and pump end) is designed to be fully submerged in the water source.
  • Silent Operation: The surrounding water muffles noise and vibration.
  • No Priming Needed: It’s always primed as it operates within the water.
  • Efficient Motor Cooling: The water provides continuous cooling to the motor, preventing overheating, which is crucial for deep-well applications.
• Max Head (Maximum Delivery): This is a key strength of the 1HP-4SDM313. It typically boasts a maximum head of 85 meters to 93 meters (approximately 279-305 feet). This makes it suitable for very deep boreholes.
• Rated Flow Rate: The flow rate depends on the head. At lower heads (e.g., pumping to a tank near the surface), it can deliver a higher flow, and at its maximum head, the flow will be lower. Typical flow rates might range from 10 L/min at 91m head to 80 L/min at 19m head, with an optimal flow often around 50 L/min at 66m head or 69 L/min at 85m head.
• Minimum Well Diameter: Designed for wells with a minimum internal diameter of 4 inches (100mm).
• Voltage: 220V-240V, 50Hz (single-phase), making it compatible with standard residential and light commercial power supplies in Kenya.
• Motor RPM: Approximately 2850-2900 RPM.
• IP Rating: Typically IP68, signifying complete protection against dust ingress and continuous immersion in water.