DAB S4 16/12 T 4OL – 4" submersible pump for wells and boreholes, 2.2 kW, 3 × 400 V

Product detailed description

The S4 16/12 T 4OL (code 60190919) is a DAB multistage submersible centrifugal pump with a 4" diameter, designed for wells and boreholes wider than 4". It is driven by a three-phase oil-filled 4OL motor rated at 2.2 kW. It suits water supply and pressure boosting in family houses and larger buildings, irrigation, and washing and fire-fighting systems.

Performance and dimensions

• number of stages 12, nominal flow 16 m³/h
• head 55 m at zero flow and 10 m at 21.6 m³/h
• rated power P2 2.2 kW (3 HP), rated current 6 A, power supply 3 × 400 V, 50 Hz
• discharge outlet 2", maximum diameter 99 mm, length of pump with motor 1497 mm
• weight of pump with motor 21.9 kg

Materials and construction

The pump jacket, shaft with coupling, suction strainer and cable guard are made of stainless steel, the suction and delivery casings of investment-cast AISI 304 steel. Impellers and diffusers are made of technopolymer, the stage casings of AISI 304 steel on this model and the non-return valve of technopolymer. The 4OL motor has bearings lubricated and cooled by a food-grade fluid, a rewindable stator in an AISI 304L steel housing and a carbon/ceramic mechanical seal. The hydraulics reach an efficiency index of MEI ≥ 0.4.

Installation and operation

The pump is installed vertically; for horizontal installation the manufacturer recommends a cooling sleeve. The water should be clean and non-aggressive, at 0 to +40 °C, with a sand content of no more than 150 g/m³; immersion is possible down to 250 m and the pump may start at most 20 times per hour. The motor can run on a frequency converter in the 30–50 Hz range. Protection of the three-phase motor must be provided by the user in the electrical installation. The electrical connection must be made by a qualified electrician.

Technical data

Frequently asked questions

What borehole size does the S4 16/12 T 4OL pump fit?
It is intended for wells and boreholes with a diameter larger than 4". The maximum pump diameter is 99 mm and with the 4OL motor it can be immersed down to 250 m.

Does the three-phase pump need motor protection?
Yes. For the three-phase T version the user must provide motor protection in the electrical installation, and the connection should be made by an electrician.

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

Can the pump be installed horizontally?
It is normally installed vertically. Horizontal installation is possible; the manufacturer then recommends a cooling sleeve.