USK Submersible Water Pump 0.5HP-4SDM307

The USK Submersible Water Pump 0.5HP-4SDM307 is a common type of pump designed for extracting water from deep wells and boreholes. The “4SDM” series typically refers to a 4-inch diameter multi-stage submersible pump, and the “307” denotes specific performance characteristics.

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

Key Features and Specifications:

• Power: 0.5 HP (horsepower) or 0.37 kW (kilowatts). This is a relatively low-power submersible pump, suitable for smaller domestic or irrigation needs.
• Model Name Breakdown:
  • 4SDM: Indicates a 4-inch (diameter) submersible multi-stage pump, meaning it’s designed to fit into 4-inch or larger boreholes. The multi-stage design uses several impellers to achieve higher head (pumping height) and pressure.
  • 3/7 (or 307): The “3” often refers to a certain flow rate range (e.g., 3 m³/h or 50 L/min at optimal head), and the “7” indicates the number of impellers or stages in the pump, which directly influences its maximum head capability.
• Submersible Design: This is its defining characteristic. The entire pump (motor and pump end) is designed to be submerged in water.
  • Quiet Operation: Being submerged, the pump operates very quietly, as the water dampens the motor noise.
  • No Priming Needed: It doesn’t require priming, as it’s already within the water.
  • Cooling: The surrounding water cools the motor, preventing overheating.
• Max Head (Maximum Delivery): For a 0.5HP 4SDM3/7 pump, the maximum head is typically around 45 to 50 meters (150-165 feet). This means it can effectively pump water up to this vertical height.
• Rated Flow Rate: The flow rate will vary with the head. At its rated head, it might deliver around 20-50 liters per minute (L/min), or 1.2 to 3 cubic meters per hour (m³/h). The flow decreases as the head increases.
• Minimum Well Diameter: Designed for wells with a minimum diameter of 4 inches.
• Voltage: 220V-240V, 50Hz (single-phase), which is standard for most residential applications in Kenya.
• Motor RPM: Around 2850-2900 RPM.
• IP Rating: Typically IP68, indicating it’s completely protected against dust and prolonged immersion in water.
• Materials:
  • Pump External Casing: High-quality stainless steel (e.g., AISI 304 SS) for excellent corrosion resistance and durability in water.
  • Motor External Casing: Also often AISI 304 SS.
  • Impellers and Diffusers: Can be made of engineering plastic (like POM or PPO) for efficiency and wear resistance, or sometimes stainless steel for enhanced durability.