Leo 4SR3-21 / 1.5KW Submersible Borehole Pump Only
10427
Introducing the LEO 4SR3-21 submersible borehole pump, a 4-inch submersible pump engineered for reliable water extraction in demanding applications across mining, agriculture, aquaculture, and industrial sectors. Built with an AISI304 stainless steel casing and advanced hydraulic design, this submersible borehole pump delivers consistent performance for groundwater supply, building site dewatering, and food and beverage processing where durability and corrosion resistance are paramount.
Featuring impellers crafted from FDA-approved Noryl® material with a floating design, the 4SR3-21 combines high-strength construction with exceptional longevity in challenging environments. Its robust AISI304 motor base meets NEMA standards, while integrated stainless steel check valves, gaskets, and internal strainers ensure trouble-free operation in applications with sand content up to 0.25%, making it ideal for both commercial installations and domestic water supply systems requiring submersible pump reliability.
At a glance
Power: 1.5 kW (2 HP)Max. head: 142 mMax. flow: 4.2 m³/h (70 l/min)Connections: Outlet 1¼"Specifications
| Brand | Leo |
| Model | 4SR3-21 |
| Type | 4SR3 Submersible Borehole Pump (100 mm) |
| Motor power | 1.5 kW (2 HP) |
| Stages | 21 |
| Connection | Outlet 1¼" |
| Shut-off head | 142 m |
| Flow range | 0 – 4.2 m³/h (0 – 70 l/min) |
| Dimensions (W × L × H) | 10 × 52 × 10 cm |
| Weight | 5 kg |
| Item code | 4SR3-21 |
Performance Table
| Flow Q (m³/h) | 0 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 2.7 | 3 | 3.6 | 4.2 |
|---|---|---|---|---|---|---|---|---|---|---|
| Flow Q (l/min) | 0 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 | 70 |
| Head H (m) | 142 | 135 | 132 | 127 | 122 | 115 | 108 | 100 | 79 | 49 |
Head at each flow rate from the manufacturer's technical data. For a duty-point check use the Get a Quote wizard below.
Performance Curves and Technical Data (PDF)
Download the curve sheet with the performance curves, dimensions and technical data for the Leo 4SR3-21:
Leo 4SR3 Series Performance Curves
422 kB | Download
Applications
- 4" SR series submersible pump adopts AISI304 casing and high-strength and durable "floating impeller"
- Impellers are made of American "Noryl®" material, which has got the approval of FDA(American Food and Drug Administration)
- With high-quality hydraulic design, AISI304 motor base up to "NEMA" standard, built-in AISI304 check valve, gasket, motorund outlet and built-in strainer
- Can be widely applied to mining and building industry, agriculture, aquaculture, food and beverage industry and family water supply
Motor And Pump
- Power: Single phase: 0.37~2.2KW 220~240V
- Power: Three phase: 0.75~7.5KW 380~415V
- Insulation class: B
- Protection grade: IP68
- Frequency: 50HZ
- Flow range: 1~10 (m3/h)
- Maximum fluid temperature: 35
- Maximum sand content: 0.25%
Need help choosing or want a price?
Our pump team will check the right size for your flow and head and give you a quote.
WhatsApp us: 082 516 2248 Get a Quote / Size my pump info@pumps.co.za
Frequently Asked Questions
What is the maximum head of the Leo 4SR3-21?
The Leo 4SR3-21 has a maximum head of 142 m.
How much water can the Leo 4SR3-21 pump?
The Leo 4SR3-21 pumps up to 4.2 m³/h (70 l/min).
What is the motor power of the Leo 4SR3-21?
The motor power is 1.5 kW (2 HP).
What are the pipe connections of the Leo 4SR3-21?
Outlet 1¼".
