The Grundfos CM range of horizontal multistage pumps are high efficiency, high quality products designed for continuous duty in various water boosting and transfer applications. They are of compact dimensions, feature axial suction and radial discharge ports and are exceptionally quiet in operation. The suction and outlet chambers are made of grey cast iron, the impeller and the impeller housing of 304 stainless steel.

The pumps are available in a wide range of sizes to suit particular applications and are designed for operation with the Grundfos PM1 pump controller which provides automatic operation according to demand as well as run-dry protection.

The pump is coupled to a totally enclosed, fan cooled Grundfos squirrel-cage motor. Single phase motors include a built in thermal overload protection and should be connected to mains power through a 10A fuse or MCB. Three phase motors should be installed with a remote starter.

Enclosure Class: IP55
Voltage: 1x240V
Insulation Class: F
Speed: 2900rpm

Pumped liquids: Thin, clean, non-aggressive and non-explosive liquids without solid particles or fibres.
Liquid temperature: 0°C to 90°C
Max. Ambient Temperature: +55°C
Max. Suction lift: According to the NPSH curve plus a safety margin of 1.0m
Max. Operating Pressure: 10bar


Model Output Power (kW) Running Current (A) Start Current (A) Dimensions (mm) Weight (kg)
A1 A2 L1 L2 B1 H H2
CM 3-4A 0.5 3.2 17 1 1 324 150 142 208 149 15
CM 3-6A 0.7 4.2 16.4 400 186 142 208 149 17
CM 3-8A 0.9 5.2 22.4 436 222 142 208 149 18


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