Submersible pump Pedrollo 4SR8-31

The hydraulic section is the main working area of a borehole pump; it is precisely what ensures water intake, pressure creation, and stable delivery to the surface. The reliability, power, and resistance to contamination of this part determine the efficiency of the entire pumping system. The Pedrollo 4SR8-31 model is one of the most productive representatives of the 4SR8 line, designed for operation under increased loads, depth, and large water consumption volumes. It is a powerful and reliable solution, combining engineering precision with wear-resistant materials.

Design Features of Pedrollo 4SR8-31

The heart of the 4SR8-31 model consists of 31 hydraulic stages, each of which increases the head and provides a powerful water supply from depth, even with significant elevation differences. This allows the model to be used in deep wells, large agricultural farms, industrial enterprises, and utility networks with high water demands.

Design advantages: 

✅ Enlarged impellers made of technopolymer with fiberglass – lightweight, durable, and resistant to abrasive wear. 

✅ Optimized diffusers contribute to reducing hydraulic resistance. 

✅ Stainless steel shaft, designed for axial loads when operating at extreme depths. 

✅ Anti-sand protection system, allowing up to 150 g/m³ of solid impurities in suspension. 

✅ Demountable and serviceable design, which is important for intensive operation.

Technical Specifications

Number of stages: 31.

Minimum well diameter: 100 mm (4").

Maximum submersion depth:

up to 200 m with Pedrollo 4PD motor,

up to 100 m with 4PS motor.

Water temperature: up to +35°C.

Permissible sand content: up to 150 g/m³.

Installation type: vertical or horizontal.

Compatibility: with Pedrollo 4PD and 4PS series motors.

Where Pedrollo 4SR8-31 is Applied

This model is designed for tasks requiring maximum powerful hydraulics with guaranteed stability: 

✅ Deep-well water supply for industrial facilities – technological processes, cooling systems, car washes. 

✅ Large-scale agriculture – irrigation of fields, greenhouses, vineyards, drip or sprinkler irrigation. 

✅ Complex pumping stations, backup and main water supply sources for populated areas. 

✅ High-rise and multi-level buildings where water pressure is critically important. 

✅ Fire safety systems where high water supply under pressure is required.

Advantages of Pedrollo 4SR8-31

Powerful and stable head – 31 stages guarantee reliable water supply even with high demands.

High resistance to abrasive wear – the model handles impurities in the water.

Energy efficiency – modern hydrodynamics reduces energy consumption at high performance.

Durability and strength – proven materials and reliable Italian quality assembly.

Minimum maintenance – maximum lifespan – the design requires minimal intervention during long-term operation.

The Pedrollo 4SR8-31 is a solution for those who need high power, reliability, and efficiency in deep-well water supply. The model is excellently suited for wells up to 200 meters deep and demonstrates excellent operating characteristics during round-the-clock use. This is the choice of professionals who value stability, durability, and European-level equipment quality.