Domestic waterworks with submersible pump 3,5" SC 2-14 400V with frequency converter - RTS

Product detailed description

This domestic waterworks unit is designed for water supply systems in residential, agricultural, and community buildings. It is commonly installed in boreholes, wells, and sumps to provide a reliable water source for domestic, irrigation, and pressure boosting applications. The system is suitable for continuous operation and integrates with automatic pressure stations. The submersible pump is built to handle abrasive substances in the water, making it ideal for use in older or contaminated water sources.

The unit is particularly suited for use in small to medium-sized fire stations, irrigation systems, and water supply networks. It is also compatible with distribution pipe installations where pressure boosting is required. The modular design of the pump allows for easy maintenance and repair, ensuring minimal downtime in case of a malfunction.

Technical parameters

EAN	8585054501953
Length of power cable (m)	20
Maximum flow rate (l/min)	70
Pump voltage (V)	400 V
Dimensions H x W x D (cm)	101x9
Pump head (m)	74
Weight	20.8 kg
Code	PR_40051

The maximum flow rate of 70 l/min and a head of 74 m are critical for sizing the system to meet the hydraulic requirements of the installation. The 400 V three-phase power supply ensures stable operation, while the 20 m power cable length provides flexibility in positioning the pump. The compact dimensions of 101 x 9 cm allow for installation in tight spaces such as pits or boreholes.

Installation and connection

The installation process involves positioning the submersible pump in the water source, connecting the pressure vessel and frequency converter, and ensuring all components are properly aligned. The pump is connected using 1 inch and 5/4 inch fittings, with a check valve and transition pieces included for secure hydraulic connections. The 20 m power cable should be routed to a suitable electrical supply with appropriate circuit protection. Installers should verify the correct submersion depth and ensure the pump is not installed in dry or low-level conditions to prevent damage. Common mistakes include incorrect thread alignment, improper cable routing, and failure to check the dry-run protection settings.

Compatibility and accessories

The system is compatible with standard pressure vessels, check valves, and transition pieces with internal and external threading. The included pressure vessel has an 8 l capacity and is equipped with a 1 inch fitting. Additional components such as pressure switches or control panels may be required for custom installations. The pump is suitable for use with automatic pressure stations and can be integrated into irrigation systems for controlled water distribution.

Technical background for designers

The submersible pump operates using a single-phase motor with thermal protection and a frequency converter for variable speed control. The impeller is designed to float within its own bearing, allowing for smooth operation and reduced wear. The stainless steel construction provides resistance to corrosion, while the modular design allows for easy disassembly and repair. The pump is suitable for submersion depths of up to 50 m and can be used in water sources with abrasive particles due to its RTS (Resistance To Sand) design. The system integrates with distribution pipes and pressure stations to maintain stable pressure levels in the network.

Service and operation

The pump is equipped with thermal protection and dry-run protection to prevent overheating and damage. Regular checks should be performed on the power cable, motor, and impeller for signs of wear or blockage. The frequency converter should be inspected for correct operation and voltage stability. The check valve and pressure vessel should also be checked for leaks or pressure loss. No specific service intervals are provided, but routine inspections are recommended to ensure long-term reliability.

Frequently asked questions

Can the pump be used in water sources with high sand content?
Yes, the pump is designed with increased resistance to sand and abrasive substances, making it suitable for use in contaminated or older water sources.

Is the pump suitable for continuous operation?
Yes, the system is designed for continuous operation and includes thermal protection to prevent overheating during extended use.

Can the pump be installed in a shallow well?
Yes, the pump is suitable for installation in wells and boreholes with a minimum submersion depth of 8 m.

Can the frequency converter be adjusted for different pressure requirements?
Yes, the built-in frequency converter allows for electronic motor speed control, enabling the system to maintain the desired pressure in the network.