DAB S4 3/25 M 4OL – 4" submersible pump for wells and boreholes, 1.5 kW, 1 × 230 V

Product detailed description

S4 3/25 M 4OL (code 60190766) is a multi-stage submersible centrifugal pump DAB with a 4" diameter, suitable for wells and bored holes with a diameter greater than 4". It is driven by a single-phase 4OL oil-filled motor with a rated power of 1.5 kW. It is suitable for water supply and pressurization in family homes and larger buildings, for irrigation, washing and fire protection systems.

Performance and dimensions

• number of stages 25, rated flow 3 m³/h
• delivery head 138 m at zero flow and 55 m at 4.2 m³/h
• rated power P2 1.5 kW (2 HP), rated current 10.8 A, power supply 1 × 230 V, 50 Hz
• delivery nozzle 1 1/4", maximum diameter 99 mm, pump length with motor 1184 mm
• weight of pump with motor 17.9 kg

Materials and construction

The pump casing, shaft with coupling, suction strainer and cable cover are made of stainless steel, the suction and discharge body from precisely cast AISI 304 steel. The impellers and diffusers are made of technopolymer, the stage bodies are made of AISI 304 steel and the check valve is made of AISI 304 steel with NBR sealing. The 4OL motor has bearings lubricated and cooled by food-grade liquid, a flexible stator in a AISI 304L steel housing and a mechanical seal of carbon/ceramic. The hydraulics achieve an efficiency index MEI ≥ 0.4.

Installation and operation

The pump is installed vertically, for horizontal installation the manufacturer recommends a cooling casing. The water must be clean and non-aggressive, with a temperature of 0 to +40 °C and a maximum sand content of 150 g/m³; submersion is possible up to 250 m and the pump may start up to 20 times per hour. The motor can withstand operation with a frequency converter in the range of 30–50 Hz. The single-phase version requires a starting capacitor and manually adjustable overload protection, which are in the control panel ordered separately. The electrical connection must be made by a qualified electrician.

Technical parameters

Frequently asked questions

Into which well can the S4 3/25 M 4OL pump fit?
It is suitable for wells and boreholes with a diameter greater than 4". The maximum diameter of the pump is 99 mm and with the 4OL motor it can be submerged to a depth of up to 250 m.

What else needs to be ordered separately for the single-phase pump?
A control panel with a starting capacitor and manually adjustable overload protection. The manufacturer supplies it separately, it is not part of the pump.

What kind of water can the pump handle?
Clean, non-viscous and non-aggressive water without abrasive substances with a temperature from 0 to +40 °C. The sand content can be up to 150 g/m³.

Can the pump be mounted horizontally?
It is installed vertically by default. Horizontal installation is possible, in that case the manufacturer recommends using a cooling casing.