Pedrollo 4SR Series 4" Submersible Pumps
Clean water | Domestic use | Civil use | Agricultural use
Introduction
The new 4SR-S series floating impeller pumps, featuring advanced hydraulic design and patented innovations, deliver outstanding performance and efficiency. They are exceptionally resistant to sand-related wear, offering a durability 10 times higher than other global market pumps. The 4SR-S pumps also incorporate a patented inductor that improves priming capabilities in wells with air/water mix or water containing gasses.
Performance Range
- Flow rate up to 450 l/min (27 m³/h)
- Head up to 576 m
- Starts per hour: 20 at regular intervals
- Minimum motor cooling flow: 8 cm/s
- Continuous running duty: S1
Installation and Use
These pumps are recommended for pumping clean water. Due to their high efficiency and reliability, they are suitable for domestic, civil, and industrial applications, including water distribution coupled with autoclaves, irrigation, washing systems, and pressure boosting.
Key Features
- Low energy consumption and remarkable durability, even in the presence of sand (up to 200 g/m³), thanks to an innovative patented hydraulics system.
Application Limits
- Liquid temperature up to +40 °C
- Maximum sand content: 200 g/m³ for 4SR-S, 150 g/m³ for 4SR-N
- Maximum operating depth below water level: 200 m with 4PD motors, 300 m with 4PS motors
- Operation: Vertical position; horizontally with specific stage limits for 4SR-S and 4SR-N models.
Includes
Electric Motor: Three-phase 400 V - 50 Hz; Single-phase 230 V - 50 Hz. Capacitor included in packaging. Power cable: 2 m for power ratings from 0.75 to 2.2 kW; 3.6 m for power ratings from 3 to 7.5 kW. The 4SR 18-N is available without a check valve.
Available Upon Request
- Different voltage requirements, 60 Hz frequency
- Cooling jacket kit
- 4SR 18-N with check valve
Patents
- European Patent No. EP3123031
- European Patent No. EP2419642 for 4SR-S
- Patent No. 10202100003057 for 4SR-S
- 4SR-S® is a registered trademark No. 018702382
- SABBIA® is registered trademark no. 5456231
Performance Curves
Detailed performance curves are provided for the following series, illustrating the relationship between flow rate (Q) and total manometric head (H), along with efficiency (η) and Minimum Energy Efficiency Index (MEI) values:
- 4SR 1-S and 4SR 1.5-S Series: Curves show performance data for various models within these series.
- 4SR 2-S and 4SR 4-S Series: Curves illustrate performance for models in the 4SR 2-S and 4SR 4-S ranges.
- 4SR 6-S and 4SR 8-S Series: Performance data curves for the 4SR 6-S and 4SR 8-S models.
- 4SR 10-N and 4SR 12-N Series: Curves detailing the performance characteristics of 4SR 10-N and 4SR 12-N pumps.
- 4SR 15-N and 4SR 18-N Series: Performance curves for the 4SR 15-N and 4SR 18-N pump ranges.
Performance curves comply with EN ISO 9906 Grade 3B tolerance limits.
Materials and Components
The pumps are constructed with high-quality materials:
- 1) Delivery port: Micro-cast AISI 304 stainless steel with thread according to ISO 228/1.
- 2) Check valve: Stainless steel AISI 304.
- 3) Motor bracket: Stainless steel AISI 304, sized to NEMA standards.
- 4) Impeller: Delrin® for 4SR-S, Noryl™ for 4SR-N.
- 5) Diffuser: Noryl™.
- 6) Stadium box: Stainless steel AISI 304.
- 7) Pump shaft: Stainless steel AISI 304.
- 8) Pump bearings: Made of AISI 316L stainless steel coated with chromium oxide to resist sand.
- 9) Tow coupling: Stainless steel.
- 10) Filter: Stainless steel AISI 304.
- 11) Cable sheath: Stainless steel AISI 304.
- 12) Motor 4": 4PD = rewindable oil filled motor; 4PS = encapsulated water filled motor.
Dimensions and Weights
Detailed tables provide dimensions (h1, h2, h3 in mm) and weights (kg) for single-phase and three-phase models across the 4SR series. These tables cover models from 4SR 1-S up to 4SR 8-S and 4SR 10-N up to 4SR 18-N, specifying both PD (oil-filled) and PS (water-filled) motor types where applicable.
Examples of Installation
A diagram illustrates the typical installation of the submersible pump in a well. Key components shown include the submersible pump (1), fixing ties (2), level control probes (3), bracket and anchor cable (4), pressure gauge (5), check valve (6), flow control gate valve (7), electrical power supply cable (8), control panel (9), autoclave tank (10), pressure switch (11), and solenoid valve/electric compressor (12).
Cooling Jacket: When a pump is installed in reservoirs, rivers, or lakes, an external cooling jacket (flow generator) is required to ensure sufficient water flow across the motor surface, preventing overheating. A diagram shows the cooling jacket assembly.
Installation Guidelines:
- The 4SR pumps are suitable for wells with a minimum diameter of 4" (100 mm).
- The submersible pump must be lowered into the well through the delivery pipe to a depth that ensures it remains fully submerged. It should be positioned at least 50 cm or one metre from the bottom of the well, even if liquid levels decrease during operation.
- It is advisable to secure the submersible pump using a stainless-steel cable connected to appropriate attachments on the delivery port.
