4" STM 7-12 - Submersible Pump
The IBO 4" STM 7-12 submersible pump is a multistage centrifugal device with a diameter of 100 mm, powered by single-phase 230 V electricity. The 230 V power supply allows it to be used in domestic installations without access to three-phase power. Increased sand resistance and floating impellers ensure reliable operation even in water intakes with poorer water quality.
Who it is for
- Owners of single-family homes – the 230 V power supply enables installation without a three-phase connection.
- Allotment holders and farm owners – a constant, reliable supply of raw water from their own deep borehole.
- Users of irrigation systems – the pump supplies sprinklers and drip lines, as well as drainage systems.
- Installers – the single-phase version expands selection options where only a 230 V power supply is available.
Applications
The 4" STM 7-12 submersible pump is designed for drawing and pumping technically clean raw water from drilled deep wells and for increasing pressure in the system supplying an installation. It is used for drawing and pumping raw water in single- and multi-family homes, farms, heat pump installations, and for supplying irrigation and drainage systems.
The pump operates vertically, submerged in a well with a minimum internal diameter of 115 mm. The pumped water must not contain mechanical impurities apart from the permitted sand content, and its temperature should not exceed 35°C. The 4" STM 7-12 230V submersible pump is a durable solution for long-term operation in a household. The pump is not a water-treatment device – when using it for other purposes, we recommend ensuring appropriate water preparation.
Features of the 4" STM 7-12 pump
The 4" STM 7-12 pump is a multistage centrifugal device with a diameter of 100 mm, powered by single-phase 230 V electricity. The use of floating impellers and increased sand resistance enables reliable operation in water intakes where standard submersible pumps would undergo 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, while 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 operates in a SiC/SiC/NBR configuration. The pump is supplied as standard with a 2 m power cable.
- Type: multistage submersible centrifugal pump
- Pump diameter: 100 mm
- Minimum well diameter: 115 mm
- Power supply: 1~ 230 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 service and post-warranty service are provided by Dambat.
Dambat – a trusted manufacturer of pumps and water engineering equipment with quality certificates.
Frequently asked questions (FAQ) – 4" STM 7-12 submersible pump
What is the 4" STM 7-12 submersible pump used for?
The IBO 4" STM 7-12 pump is used for drawing and pumping raw water from drilled deep wells and for increasing pressure in the system supplying an installation. Thanks to its 230 V power supply, it is suitable for homes without a three-phase connection.
How does the 4" STM differ from the 4" ST?
4" STM pumps are powered by single-phase 230 V electricity, while 4" ST pumps are powered by three-phase 400 V electricity. The hydraulics of both versions are the same, and the choice depends on the type of power supply available in the installation.
Can the 4" STM 7-12 pump be connected to a standard 230 V socket?
The pump is powered by single-phase 230 V electricity; however, the electrical installation should be carried out by a suitably qualified person. The circuit must be equipped with a residual-current device and proper grounding.
What type of well can the 4" STM 7-12 pump be installed in?
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 connection should be located at least 2 m above the lowest water level.
Can the 4" STM 7-12 pump handle water containing sand?
The pump has increased sand resistance thanks to its floating impellers and allows a sand content of up to 5%. However, please note that pumping sandy water still shortens the service life of the working components.
Where can the 4" STM 7-12 submersible pump be purchased?
As the manufacturer, we do not sell directly. The IBO 4" STM 7-12 submersible pump can be purchased from our trade partners, installation wholesalers, and authorized online distributors.
What warranty is provided for the 4" STM 7-12 pump?
The IBO 4" STM 7-12 submersible pump is covered by a 24-month (2-year) manufacturer’s warranty. Warranty service and post-warranty service are provided by Dambat.
