In chiller units, setting to constant temperature (with E-motor) instead of constant pressure (with regulating valve) saves energy and smaller pumps can be used (running faster). The viscosity of glycol and brines changes with the liquid temperature. Grundfos pumps can be supplied with oversized motors that efficiently cope with higher load. Critical cooling processes require that the temperature does not deviate. Grundfos speed-controlled pumps make sure that the temperature is held constant.

Low temperatures in installations can cause water condensation in the motor at standstill. With Grundfos integrated motor heaters condensation is completely avoided. To prevent deformation because of thermal expansion CRN versions are recommended for low-temperature applications. On the secondary side usually ice water, glycol, brine or alcohol-water are used as cooling liquid. This can be best handled with stainless steel pumps.

1. Endsuction close coupled multistage pumps - CM/CME
CM, CME are reliable, quiet and compact horizontal end-suction pumps. The modular pump design makes it easy to make customised solutions.

2. Endsuction close coupled single-stage pumps - NBG/NBGE
Close-coupled pumps according to ISO 2858. Flanges are PN 16 with dimensions according to AS2129 table E. The pump has an axial suction port, radial discharge port, horizontal shaft and a back pull-out design enabling removal of the motor, motor stool, cover and impeller without disturbing the pump housing or pipework.

3. Endsuction close coupled single-stage pumps - NB/NBE
End-suction close-coupled pumps according to EN 733. The pump has an axial suction port, radial discharge port, horizontal shaft and a back pull-out design enabling removal of the motor, motor stool, cover and impeller without disturbing the pump housing or pipework.

4. Endsuction long coupled single-stage pumps - NK/NKE
Standard pumps according to EN 733. The pump has an axial suction port, a radial discharge port and horizontal shaft. It is of the back pull-out design enabling removal of the coupling, bearing bracket and impeller without disturbing the motor, pump housing or pipework.

5. Inline single-stage pumps - TP/TPE, TPD/TPED
Grundfos TP/TPE pumps are single-stage, close-coupled in-line centrifugal pumps with mechanical shaft seal and primely for applications such as heating/cooling/district energy. TPD/TPDE pumps are the twin-head version.

6. Circulator pumps - MAGNA
The Grundfos MAGNA circulator pumps are designed for heating and cooling applications in commercial buildings. The pumps are available in both cast-iron and stainless-steel and as twin-head variants. The pumps are maintenance-free due to the canned-rotor type design.

7. Horizontal splitcase pumps - LS
Grundfos LS is a horizontal, single-stage or double-stages, between bearings, split case pump. The axially split design allows easy removal of the top casing and access to the pump components without disturbing the motor or pipe work.

8. Immersible Pumps - MTR/MTRE
Vertical multistage centrifugal pump designed for tank top mounting and for pumping of cooling lubricants and cutting oils for machine tools, cooling applications, industrial liquid transfer and similar applications.