Pedrollo 4SR12-S submersible pumps are specifically designed for water supply from boreholes, though can also be used in other submersible applications in either vertical or horizontal configuration. They feature a hydraulic design that incorporates floating impellers which together with especially resistant component materials provide high resistance to sand content in the pumped water.

The pump impellers and diffusers are made from technopolymer while the stage casings, top housing, suction connector, pump sleeve and shaft are made of AISI 304 stainless steel. The pump is supplied with a 1.5m tail cable.

Pumps are coupled to a Pedrollo two pole sealed motor constructed principally from AISI 316 stainless steel. A QEM Control box is available for single phase pumps which incorporates a fused rotary switch, run indicator light, thermal overload with manual reset and capacitor which can be connected directly to the mains power supply. Three phase motors require a remote direct in-line starter and if irregular electrical supply is prevalent an additional quick tripping voltage sensing relay is recommended.

Enclosure Class: IP68
Insulation  Class: F
Speed: 2900rpm

Pumped Liquid: Thin, clean, chemically non aggressive liquids with a maximum sand content of 150gm/m³.
Max. Liquid Temperature: +30°C.
Min. Borehole Diameter: 110 mm 


Model Power(kW) Current (A) DN(") Dimensions (mm) Weight (kg)
kW HP 1x240V 3x415V H1 H2
4SR12/9 1.5 2 11 5 835 396 19
4SR12/14 2.2 3 15 6 1200 437 24
4SR12/19 3 4   7 1565 450 28
4SR12/25 4 5.5   9 2003 505 36
4SR12/34 5.5 7.5   12 2660 590 47
4SR12/41 7.5 10   16 3165 800 61