Grundfos SP2A-13 4" Submersible Borehole Pump (single phase)

The Grundfos SP2A-13 has a rated flow of 2 m³/h at 52 metres head. This is equivalent to approximately 33.3 litres per minute at the rated duty point. Actual flow depends on the system curve, so the required Total Dynamic Head (TDH) should be checked against the manufacturer's pump performance curve.

The SP2A-13 is a 4-inch submersible borehole pump with a maximum outside diameter of approximately 101 mm, including the cable guard and motor. The borehole must provide sufficient installation clearance and allow adequate motor cooling. Check the borehole casing's internal diameter before installation.

The SP2A-13 is fitted with a 0.55 kW Grundfos MS402 single-phase motor, rated for a 230 V, 50 Hz supply. This version uses a capacitor-start, induction-run (CSIR) motor arrangement and requires the appropriate external control box for starting and operation.

Yes. SCL Water specifies a compatible Grundfos SA-CSIR MS402 single-phase control box for this pump. The control box provides the necessary starting components and must be matched to the motor rating. Correct electrical installation and protection are essential for reliable operation and warranty compliance.

The SP2A-13 has a rated head of 52 metres at 2 m³/h. Grundfos performance data indicate a shut-off head of approximately 77 metres at zero flow. The maximum head should not be used as the normal operating duty; the pump should be selected using its performance curve at the required flow rate.

Grundfos specifies a maximum sand content of 50 ppm for SP1A to SP5A pumps, including the SP2A-13. Higher sand concentrations can cause abrasive wear to hydraulic components and reduce pump service life. Borehole development and sustainable abstraction rates should be considered where sand ingress is present.

The Grundfos SP2A-13 has an Rp 1¼-inch threaded discharge connection and an integral return valve. Rising-main diameter should be selected according to the required flow, pipe length and acceptable friction losses rather than simply matching the pump outlet.

Grundfos SP pumps can be installed vertically or horizontally, subject to the manufacturer's installation requirements. Horizontal installations require particular attention to motor cooling and may need a cooling sleeve. The motor must remain adequately submerged, and the installation must comply with the applicable Grundfos motor-positioning requirements.

Yes. The SP2A-13 is suitable for clean-water applications including domestic borehole water supply, agricultural water supply, irrigation and pressure boosting. Its rated duty of 2 m³/h at 52 metres head makes it suitable for systems whose flow and pressure requirements fall within its operating range. The borehole's sustainable yield must also be considered.

Calculate the required Total Dynamic Head (TDH) using the dynamic water level, discharge elevation, required outlet pressure and pipework friction losses. The resulting duty point should be checked against the SP2A-13 performance curve. Also confirm borehole diameter, sustainable yield and availability of a suitable single-phase electrical supply.