USK Submersible Water Pump 1HP- 3SDM227

The USK Submersible Water Pump 1HP-3SDM227 is a specialized and powerful pump designed for extracting water from very deep boreholes, particularly those with a narrow 3-inch diameter. The “3SDM” series indicates its 3-inch diameter and multi-stage design, while “227” denotes its specific performance characteristics, especially its high head capability due to a large number of impellers.

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 is a robust power rating for a 3-inch pump, allowing it to achieve impressive head and decent flow rates for demanding applications.
• Model Name Breakdown:
  • 3SDM: This is the critical identifier, meaning it’s a 3-inch (diameter) submersible multi-stage pump. This design is specifically for boreholes with a minimum internal diameter of 3 inches (approximately 75mm), making it suitable for wells where standard 4-inch pumps cannot fit. The “multi-stage” aspect refers to the use of multiple impellers stacked in series, which is essential for building high pressure and lifting water from great depths.
  • 2/27 (or 227): The “2” typically refers to a specific flow rate series (e.g., around 2 m³/h or 33 L/min at optimal efficiency). The “27” indicates the number of impellers or stages within the pump. A higher number of stages directly correlates to a significantly greater maximum head, allowing this pump to handle exceptionally deep wells.
• Submersible Design: The entire pump (motor and pump end) is designed to operate fully submerged in water. This design offers several advantages:
  • Silent Operation: The water acts as an excellent sound insulator, making the pump operation virtually silent.
  • No Priming Required: Since it’s submerged, it’s always “primed” and ready to pump, eliminating the need for manual priming, which can be difficult for deep wells.
  • Efficient Motor Cooling: The continuous flow of water around the motor effectively dissipates heat, preventing overheating and extending the motor’s lifespan, crucial for continuous deep-well pumping.
• Max Head (Maximum Delivery): Due to its 1HP motor and 27 stages, this pump is designed for extreme depths. The maximum head for a 1HP 3SDM227 pump is typically in the range of 140 meters to 170 meters (approximately 460-558 feet). This makes it suitable for some of the deepest residential or agricultural boreholes.
• Rated Flow Rate: The flow rate will vary inversely with the head. While it can achieve very high heads, the flow rate at maximum head will be lower. At its optimal efficiency point, it might deliver around 20-40 liters per minute (L/min), or 1.2 to 2.4 cubic meters per hour (m³/h).
• Minimum Well Diameter: Requires a minimum borehole/well internal diameter of 3 inches (75mm).
• Voltage: 220V-240V, 50Hz (single-phase), suitable for standard residential and light commercial power supplies in Kenya.
• Motor RPM: Approximately 2850-2900 RPM.
• IP Rating: Typically IP68, indicating complete protection against dust ingress and prolonged immersion in water under specified conditions.