End Suction Pump: Design and Configurations
The end suction pump is the most common type of centrifugal pump. Its design is characterized by a single suction inlet on one end and a top-centerline discharge outlet. Fluid enters the impeller eye axially (parallel to the shaft) and is discharged radially (perpendicular to the shaft).
This design is typically available in two main configurations. The first is close-coupled, where the impeller is mounted directly onto the motor shaft, creating a compact, cost-effective unit. The second is frame-mounted, where the pump's wet end is separated from the motor and connected via a flexible coupling. This configuration allows the pump to be driven by various sources (electric motors, diesel engines) and simplifies maintenance on the pump or motor independently. The horizontal end suction pump is widely used for clear water and mildly corrosive fluids in HVAC, irrigation, and general industrial services due to its simple construction and reliability.
