🔧 ESPA ES4 03 4" Submersible Pump with O4I Motor: complete borehole assembly
Ready-to-install assembly with a 4" ESPA ES4 03 submersible hydraulic section and an ESPA O4I motor. Designed to pump clean water from boreholes for domestic water supply, irrigation, agriculture and industry. Available in single-phase 230 V and three-phase 400 V versions, with power ratings from 1 to 3 hp.
✔ ES4 hydraulic section
- ✔ Body, intake, discharge and shaft: AISI 304 stainless steel
- ✔ Diffusers and impellers: floating, made of technopolymer
- ✔ Seals: NBR/EPDM
- ✔ Built-in check valve
- ✔ Coupling: NEMA MG1-18.388 standard
⚙️ O4I motor
- ✔ 4" ESPA O4I motor, 2-pole asynchronous, oil-cooled
- ✔ Housing and shaft: AISI 304 stainless steel
- ✔ IPX8 protection and Class F insulation
- ✔ Continuous duty; single-phase model has built-in thermal protection
- ✔ Cable without plug and external capacitor for single-phase models
📊 Technical Table by Model
| Model | Motor | Voltage | HP | kW | Hydraulic unit length (mm) | Connection |
|---|---|---|---|---|---|---|
| ES4 03/11 | O4I 100M | 1x230V | 1 | 0,75 | 342 | 1 1/4" |
| ES4 03/11 | O4I 100 | 3x400V | 1 | 0,75 | 342 | 1 1/4" |
| ES4 03/16 | O4I 150M | 1x230V | 1,5 | 1,1 | 430 | 1 1/4" |
| ES4 03/16 | O4I 150 | 3x400V | 1,5 | 1,1 | 430 | 1 1/4" |
| ES4 03/21 | O4I 200M | 1x230V | 2 | 1,5 | 519 | 1 1/4" |
| ES4 03/21 | O4I 200 | 3x400V | 2 | 1,5 | 519 | 1 1/4" |
| ES4 03/32 | O4I 300M | 1x230V | 3 | 2,2 | 749 | 1 1/4" |
| ES4 03/32 | O4I 300 | 3x400V | 3 | 2,2 | 749 | 1 1/4" |
💧 Head (m) by Flow Rate (m³/h)
| Model | 0 | 1,2 | 1,8 | 2,4 | 3,0 | 4,2 |
|---|---|---|---|---|---|---|
| ES4 03/11 | 72 | 68 | 64 | 58 | 49 | 26 |
| ES4 03/16 | 106 | 101 | 95 | 83 | 70 | 33 |
| ES4 03/21 | 142 | 135 | 127 | 115 | 100 | 49 |
| ES4 03/32 | 208 | 200 | 187 | 165 | 138 | 62 |
In the table, each column shows a flow rate in m³/h, and the value is the head in meters.
📋 Operating Limits
- ✔ Maximum water temperature: 35 °C (motor limit)
- ✔ Suspended sand: up to 100 g/m³
