4" ST 5-20 – Submersible Pump
The IBO 4" ST 5-20 submersible pump is a multistage centrifugal device with a diameter of 100 mm, powered by a three-phase 400 V supply. Thanks to its increased resistance to sand and floating impellers, it also operates reliably in water sources with poorer water quality. It is designed for drawing and pressurizing raw water from a deep drilled well, for use in households and farms as well as irrigation systems.
Who it is for
- Owners of single-family and multi-family homes with their own deep drilled well – for the continuous and reliable drawing and pressurizing of raw water.
- Farms – increased resistance to sand and continuous operation are suitable for intensive water intake.
- Users of irrigation systems – the pump supplies sprinklers, drip lines, and drainage systems.
- Installers – the three-phase power supply and robust construction facilitate selection for more demanding installations.
Application
The 4" ST 5-20 submersible pump is designed for drawing and pressurizing technically clean raw water from drilled deep wells. It is used in households and farms relying on their own water source, in heat pump installations, and for supplying irrigation and drainage systems. The pump is not a water-treatment device – when using it for other purposes, we recommend ensuring appropriate water treatment.
The pump operates in a vertical position, submerged in a well with a minimum internal diameter of 115 mm. The raw water being pumped must not contain mechanical impurities beyond the permitted sand content, and its temperature should not exceed 35°C. The 4" ST 5-20 400V submersible pump is a durable solution for long-term operation on a farm.
Features of the 4" ST 5-20 pump
The 4" ST 5-20 pump is a multistage centrifugal device with a diameter of 100 mm, powered by a three-phase 400 V supply. The use of floating impellers and increased resistance to sand enables reliable operation in water sources where standard submersible pumps would experience accelerated wear. The permitted sand content is up to 5%, and the motor is oil-cooled.
Thermal protection built into the motor winding protects the device against overheating. The suction and discharge bodies are made of brass; the housing, shaft, and rotor are made of AISI 304 stainless steel; and the impellers and diffusers are made of PPO polymer. The mechanical seal uses a SiC/SiC/NBR configuration. The pump is equipped as standard with a 2 m power cable.
- Type: multistage centrifugal submersible pump
- Pump diameter: 100 mm
- Minimum well diameter: 115 mm
- Power supply: 3~ 400 V / 50 Hz
- Protection rating / insulation class: IP68 / class B
- Operating mode: continuous
- Max. liquid temperature: 35°C
- Max. immersion depth: 150 m
- Power cable: 2 m
- Materials: brass, AISI 304 stainless steel, PPO polymer
IBO – 24 months (2 years) manufacturer’s warranty. Warranty and post-warranty service is provided by Dambat.
Dambat – a trusted manufacturer of pumps and water engineering equipment with quality certificates.
Frequently Asked Questions (FAQ) – 4" ST 5-20 Submersible Pump
What is the 4" ST 5-20 submersible pump used for?
The IBO 4" ST 5-20 pump is used for drawing and pressurizing technically clean raw water from drilled deep wells. It is suitable for households and farms as well as irrigation systems.
How does the 4" ST differ from the 4" STM?
4" ST pumps are powered by a three-phase 400 V supply, while 4" STM pumps use a single-phase 230 V supply. The hydraulics of both versions are the same, and the choice depends on the type of power supply available in the installation.
In what type of well can the 4" ST 5-20 pump be installed?
The pump can be installed in a well with a minimum internal diameter of 115 mm, in a vertical position. The maximum immersion depth is 150 m, and the discharge outlet should be located at least 2 m above the lowest water level.
Can the 4" ST 5-20 pump handle water containing sand?
The pump has increased resistance to sand thanks to its floating impellers and permits a sand content of up to 5%. However, pumping sandy water still shortens the service life of the working components.
Which liquids must not be pumped with the 4" ST 5-20 pump?
The pump must not be used for salt water or water containing corrosive, flammable, petroleum-based, or long-fiber contaminants. It is also unsuitable for food products or water with excessive mineral content.
Where can the 4" ST 5-20 submersible pump be purchased?
As the manufacturer, we do not sell directly. The IBO 4" ST 5-20 submersible pump can be purchased from our trade partners, installation wholesalers, and authorized online distributors.
What warranty does the 4" ST 5-20 pump have?
The IBO 4" ST 5-20 submersible pump is covered by a 24-month (2-year) manufacturer’s warranty. Warranty and post-warranty service is provided by Dambat.
