Submersible centrifugal pumps for wells and boreholes with a diameter greater than 4". The pumps are used for pumping out water, for pressurising and supplying water to distribution systems in small and large buildings, both residential and industrial, as well as for irrigation, washing and fire-fighting systems. Technopolymer impellers with stainless steel wear rings. Pump casing, shaft, motor coupling, integrated suction strainer and cable guard made of stainless steel. Suction body, delivery body and lifting eyes are made of AISI 304 stainless steel micro-casting. Removable integrated check valve made of technopolymer or stainless steel (depending on the model). Technopolymer impellers designed to ensure a high level of efficiency in accordance with Directive 2009/125/EC (Eco-design - ErP) with an MEI index ≥ 0.4 across the whole range. ACS certified, WRAS certified.

The 4OL motor is a two-pole asynchronous motor, whose parts in contact with water are made of AISI 304L stainless steel. Cooling and lubrication of the ball bearings is ensured by a special food-grade liquid. The rewindable stator is housed in an AISI 304L stainless steel casing, secured with steel pins to the upper motor support.
Fitted with a carbon-ceramic mechanical seal.

• Pumped liquid: clean, free of solid and abrasive particles, non-viscous, non-aggressive, chemically neutral, with properties close to water
• Maximum pump diameter: 99 mm
• Maximum sand content: 150 g/m³
• Discharge port diameter: S4-1, S4-2, S4-3, S4-4, S4-6: 1 1/4" S4-8, S4-12, S4:16: 2"
• Impeller material: technopolymer
• Liquid temperature range: from 0°C to +40 °C
• Maximum submersion: 4OL: 250 m
• Maximum number of starts: 20/h
• Protection rating: IP68
• Insulation class: F
• Single-phase voltage: 1x230 V 50 Hz
• Three-phase voltage: 3x230 V 50 Hz - 3x400 V 50 Hz
• Installation: vertical position. Horizontal installation is possible; a cooling jacket is recommended.