USK Submersible Water Pump 0.5HP 3SDM214

Understanding the Model (3SDM214):

• 3SDM: This is the crucial part of the model code:
  • 3: Refers to the pump’s diameter. It’s designed to fit into a 3-inch (approximately 75mm) borehole casing (or larger). This is a significant distinction from the more common 4-inch pumps, making it suitable for older or narrower boreholes.
  • SDM: Indicates it’s a Submersible Deep well Multistage pump. It has multiple impellers (stages) to build up pressure and lift water from considerable depths. “SDM” often implies stainless steel construction for the motor and pump casing.
• 2: This number typically indicates the approximate flow rate in cubic meters per hour (m3/h) at a specific head, or it might refer to a flow series. So, a nominal flow rate around 2 m3/h (2000 liters per hour or approximately 33 liters per minute) is expected.
• 14: This refers to the number of impellers (stages) in the pump. With 14 impellers, this pump is designed to generate a relatively high head (pressure) for its horsepower, allowing it to lift water from significant depths even with a 0.5HP motor.

USK Submersible Water Pump 0.5HP 3SDM214 Key Features and Performance:

• Submersible Design: The entire pump (motor and pump end) is designed to be fully immersed in the water within the borehole. This ensures quiet operation, eliminates priming issues, and is efficient for deep water extraction.
• 0.5HP (Horsepower): This is the motor’s power output, approximately 370 Watts (0.37 kW). For a 3-inch submersible pump with 14 impellers, this horsepower focuses on maximizing head rather than flow rate. It’s an entry-level power suitable for domestic water supply from deeper narrow boreholes.
• Voltage: Single-phase 220V/230V AC (50Hz), compatible with standard household electricity in Kenya.
• Maximum Head (Vertical Lift): Due to the 14 impellers, a 0.5HP 3SDM214 pump typically has a very good maximum head, often in the range of 80 to 90 meters. This makes it suitable for lifting water from significantly deep, narrow boreholes.
• Rated Flow Rate: As mentioned, around 2 m3/h (2000 liters per hour or 33 liters per minute) at its optimal operating head. The flow rate will decrease as the operating depth increases.
• Construction:
  • Body: Usually stainless steel (AISI 304 grade) for corrosion resistance.
  • Impellers/Diffusers: Often made from high-strength thermoplastic (like Noryl or POM) or stainless steel, designed for durability.
  • Motor: Hermetically sealed.
  • Built-in Check Valve: Often included to prevent backflow.
  • Control Box: Comes with a separate control box for capacitor and thermal overload protection.
• Minimum Well Diameter: Crucially, it requires a borehole with a minimum diameter of 3 inches (75mm) to fit.
• Cable Length: Typically supplied with a standard submersible cable length (e.g., 30-50 meters).
• Sand Content: Designed for clean water or water with very low sand content (e.g., max 0.25% by weight).