Grundfos Submersible groundwater pump SP 7-37

Submersible borehole pump, suitable for pumping clean water. Can be installed vertically or horizontally. All steel
components are made in stainless steel, EN 1.4301 (AISI 304), that ensures high corrosive resistance. This pump
carries drinking water approval.
Further product details
The pump is suitable for applications similar to the following:
– raw-water supply
– irrigation
– groundwater lowering
– pressure boosting
– fountain applications.
The Grundfos SP pump is renowned for its high efficiency and already complies with the requirements of the
Minimum Efficiency Index, and therefore Grundfos is amongst the best in class within submersible pumps.
Pump
All pump surfaces that are in contact with pumped liquids are made in stainless steel which makes them corrosionand wear-resistant. The corrosion diagram below shows the capabilities of the pump and motor in relation to the
temperature in Celsius (y-axis) and the concentration of chloride in ppm (x-axis).
The elastomer parts in the pump offer good wear resistance and long service intervals.
The bearings are made of LSR (Liquid Silicone Rubber), sealing rings are made of TPU (Thermoplastic
Poly-Urethane) and the non-return valve is made of NBR (Nitrile-Butadiene Rubber).
The special elastomer material of the bearings offers increased resistance to sand and other abrasive particles (from
50 to 150 mg/l).
In case the pump is used for pumping water with high content of hydrocarbons or solvents, Grundfos offers FKM
rubber parts (Fluorocarbon) which are oil and temperature-resistant up to 90 °C.
The pump is built with octagonal bearings with sand flush channels that minimise wear. As wear of the pump is
inevitable, the pump design allows for easy replacement of all internal wear parts (bearings, impeller, wear rings and
seal rings) to maintain high performance and a long lifetime.
The suction interconnector is fitted with a strainer to prevent large particles from entering the pump. The suction
interconnector is designed to comply with NEMA standards for motor mounting/dimensions.
Motor
The stator is hermetically encapsulated in stainless steel and the windings are embedded in polymer compound. This
results in high mechanical stability, optimum cooling and reduces the risk of short circuits in the windings.