Submersible pump Pedrollo 4SR4-46

The hydraulic section is the main working part of a deep-well pump, encompassing the entire water pumping module: a multi-stage system of impellers, diffusers, a shaft, and seals. It is responsible for creating the necessary pressure, ensuring water delivery to a specified height, and stable performance. The Pedrollo 4SR4-46 is a flagship model in the 4SR4 line, designed for facilities with increased demands for head and long-term continuous operation.

Engineering Features and Design

The 4SR4-46 model features 46 working stages, each increasing the head, forming a powerful and stable water flow. This allows the pump to be used in systems with depths of up to 200 meters and with large elevation differences. At the same time, the pump maintains stable operation even with fine solid inclusions in the water – up to 150 g/m³ of sand, making it suitable for most wells in Moldova and other regions.

Main structural elements:

 ✅ 46 stages of impellers made of glass fiber-reinforced technopolymer – ensure high pressure, resistance to wear and corrosion. 

✅ Diffusers are specially profiled for smooth flow passage without losses.

 ✅ The axial front insert of patented shape prevents sand from entering bearings and friction elements. 

✅ The stainless steel shaft withstands extreme loads during deep installation. 

✅ Anti-abrasive seals and a shaft bearing design, calculated for prolonged operation at high pressure.

Technical Parameters

Number of stages: 46.

Recommended well diameter: from 100 mm (4").

Submersion depth:

up to 200 m with 4PD motor (oil-filled),

up to 100 m with 4PS motor (water-cooled).

Maximum permissible sand content: 150 g/m³.

Water working temperature: up to +35°C.

Installation type: vertical and horizontal (observing installation rules).

Compatibility with electric motors: Pedrollo 4PD / 4PS.

Areas of Application for Pedrollo 4SR4-46

The 4SR4-46 model is oriented towards facilities requiring high water delivery at high head and long system durability:

 ✅ Industrial enterprises needing stable water supply over significant distances or for cooling systems.

 ✅ Municipal and agricultural water supply systems, including collective wells. 

✅ Irrigation systems, including drip and sprinkler irrigation, requiring high pressure. 

✅ Deep-well pumping stations with reservoirs and water supply to multiple levels/buildings. ✅ Fire safety systems, backup circuits, high-pressure pumping units.

Advantages of the Pedrollo 4SR4-46 Model

Maximum power in the 4SR4 class – one of the most productive hydraulic sections in the lineup.

Operation at extreme depths – suitable for wells up to 200 meters.

Reliability in aggressive conditions – resistant to sand and contamination content up to 150 g/m³.

Compatibility with professional motors – suitable for continuous operation with Pedrollo motors.

Long-term cost savings – due to robust design and reduced maintenance needs.

If you are looking for the most reliable and productive solution for deep-well water supply that is not afraid of extreme conditions, the Pedrollo 4SR4-46 is an undisputed favorite. This is an engineeringly perfect hydraulic section, designed for many years of intensive operation in industrial, agricultural, and engineering systems. Italian quality, innovative technologies, and the reputation of the Pedrollo brand – are a guarantee that your pump will operate stably, safely, and without unnecessary maintenance costs.