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. Removable integrated check valve made of technopolymer or with a stainless steel plate (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 4GG motor is a two-pole asynchronous motor, whose parts in contact with water are made of AISI 304 stainless steel. The thrust block and housings are cooled and lubricated with a water-glycol mixture. The rotor is mounted on sliding radial bearings, with the axial load absorbed by a robust sliding thrust bearing.

• Operating range: up to 21.6 m³/h with head up to 427 metres
• 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 ¼"
• S4-8, S4-12, S4-16: 2"
• Impeller material: technopolymer
• Liquid temperature range: from 0 °C to + 40 °C
• Maximum submersion: 4GG: 300 m
• Maximum number of starts: 20/h
• Protection rating: IP 68
• 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