USK Submersible Water Pump 1HP 3SDM227

The “USK Submersible Water Pump 1HP 3SDM227” is a very specific model of deep well submersible pump, particularly designed for applications where high head (vertical lift) is required, often from narrower boreholes.

Understanding the Model Code “3SDM227”:

• 3: Indicates the pump’s diameter in inches. This means it’s a 3-inch pump, designed to fit into borehole casings that are 3 inches (75mm) or wider. This is a crucial detail, as many boreholes are 4 inches, but some older or specific ones might be narrower.
• SDM: This often refers to a “Stainless Steel Deep Well Motor,” suggesting that the pump’s motor casing and likely its hydraulic components are constructed from corrosion-resistant stainless steel. It also signifies that it’s a multi-stage centrifugal pump, using multiple impellers to build significant pressure.
• 2: This number might represent a specific flow rate series (e.g., approximately 2 cubic meters per hour) or a design characteristic.
• 27: This is a key indicator for submersible pumps and refers to the number of impellers (stages) in the pump. A higher number of impellers allows the pump to generate significantly more pressure (head) from the same motor size. 27 impellers on a 1HP pump suggests a very high head capability.

Key Features and Specifications (Typical for USK 1HP 3SDM227 Submersible Water Pump):

• Pump Type: Submersible Borehole Pump. Designed for full immersion in a well or borehole.
• Horsepower (HP): 1 HP (0.75 kW). This provides substantial power for deep well applications.
• Performance:
  • Maximum Head (Vertical Lift): Due to its 27 impellers, this pump is designed for an exceptionally high maximum head. While exact figures for the USK 3SDM227 were not immediately prominent, other pumps with similar configurations (1HP, 3-inch, ~25-27 stages) can achieve heads in the range of 150 to 180 meters or even higher. You would need to confirm the precise maximum head from a specific seller’s datasheet for this model.
  • Flow Rate: Flow rates will decrease significantly as the head increases. For a pump designed for such high heads, expect flow rates ranging from approximately 10 to 30 liters per minute (L/min) (0.6 to 1.8 m³/h), or sometimes slightly higher at lower heads.
• Construction:
  • Stainless Steel Body: The pump’s external casing, shaft, and likely critical internal components are made of stainless steel (e.g., AISI 304) for excellent corrosion resistance and durability in submerged, long-term conditions.
  • Impellers: Multi-stage impellers, often made of durable engineering plastic (e.g., Noryl/PPO) or stainless steel, designed to handle some sand content.
  • Motor Windings: Typically 100% copper coil windings for optimal electrical efficiency and motor longevity.
• Voltage: Single-phase 220V-240V AC (50Hz), compatible with standard household power in Kenya.
• Control Box: Includes an external control box for starting, motor protection, and capacitor.
• Cable: Comes with a pre-attached electrical cable, the length of which should correspond to the pump’s maximum head (e.g., 100m, 120m,