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Variable Speed Pumps

These pumps are called Variable Speed Drive Pressure Pumps "Constant Pressure Pumps". As you turn taps on and off, the motor speed adjusts accordingly giving you constant pressure. The pump controller adjusts the motor speed and maintains constant outlet pressure, even with fluctuating demand.

Variable frequency drives are used for adjusting flow or pressure to the actual demand. They control the frequency of the electrical power supplied to pumps or fans. Significant power savings can be achieved when using a VFD pump. 

A variable frequency drive is a system for controlling the rotational speed of an alternating current electric motor. It controls the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable frequency drives are also known as adjustable frequency drives (AFD), variable speed drives (VSD), AC drives, or inverter drives. 

Automatic frequency control consists of a primary electrical circuit converting the alternating current into a direct current, then converting it back into an alternating current with the required frequency. Internal energy loss in the automatic frequency control is rated ~3.5 % 

Variable frequency drives are widely used on pumps and machine tool drives, compressors and in ventilations systems for large buildings. Variable frequency drive motors on fans save energy by allowing the volume of air moved to match the system demand. Reasons for employing automatic frequency control can both be related to the functionality of the application and for saving energy. For example, automatic frequency control is used in pump applications where the flow is matched either to volume or pressure. The pump adjusts its revolutions to a given setpoint via a regulating loop. Adjusting the flow or pressure to the actual demand reduces power consumption.

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    Grundfos Hydro SOLO-E CRIE 15 Variable Speed Pressure Booster Pump Package (Max 460LPM)

    Grundfos Hydro SOLO-E CRIE15 Variable Speed Pressure Booster Set (Max 460LPM) The Grundfos Hydro Solo-E booster system is a complete, stand-alone ...

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    Grundfos Hydro SOLO-E CRIE 20 Variable Speed Pressure Booster Pump Package (Max 550LPM)

    Grundfos Hydro SOLO-E CRIE20 Variable Speed Pressure Booster Set (Max 550LPM) CRIE 20 - Three Phase with 80 Litre Tank The Grundfos Hydro Solo-E ...

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    Grundfos Hydro SOLO-E CRIE 45 Variable Speed Pressure Booster Pump Package (Max 1100LPM)

    Grundfos Hydro SOLO-E CRIE45 Variable Speed Pressure Booster Set (Max 1100LPM) - Three Phase The Grundfos Hydro Solo-E booster system is a comple...

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    Grundfos Hydro SOLO-E CRIE 1 Variable Speed Pressure Booster Pump Package (Max 46LPM)

    Grundfos Hydro SOLO-E CRIE1 Variable Speed Pressure Booster Set (Max 46LPM) The Grundfos Hydro Solo-E booster system is a complete, stand-alone sol...

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    Grundfos Hydro SOLO-E CRIE 64 Variable Speed Pressure Booster Pump Package (Max 1700LPM)

    Grundfos Hydro SOLO-E CRIE64 Variable Speed Pressure Booster Set (Max 1700LPM) - Three Phase The Grundfos Hydro Solo-E booster system is a comple...

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    Grundfos Hydro SOLO-E CRIE 10 Variable Speed Pressure Booster Pump Package (Max 260LPM)

    Grundfos Hydro SOLO-E CRIE10 Variable Speed Pressure Booster Set (Max 260LPM) - Single Phase The Grundfos Hydro Solo-E booster system is a comple...

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  • Grundfos Hydro MPC-E Automatic Variable Speed Pressure Boosting Pump - Single Phase Product Name: Hydro MPC E DUAL - 2 X CRIE 3-2 0.37 kW - Single Phase, Hydro MPC E DUAL - 2 X CRIE 3-4 0.55 kW - Single Phase, Hydro MPC E DUAL - 2 X CRIE 3-5 0.75 kW - Single Phase, Hydro MPC E DUAL - 2 X CRIE 3-8 1.1 kW - Single Phase
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    Grundfos Hydro MPC-E Dual CRIE 3 Automatic Variable Speed Pressure Boosting Pump Package (Max 180LPM)

    Grundfos Hydro MPC-E Dual CRIE 3 Automatic Variable Speed Pressure Boosting Pump Set (Max 180LPM) The Grundfos Hydro MPC-E Packaged Pump System is ...

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    Grundfos CRIE 1 Variable Speed Vertical Multistage Pumps (Max 46LPM)

    Grundfos CRIE 1 Variable Speed Vertical Multistage Pumps (Max 46LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable speed d...

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    Grundfos CRIE 15 Variable Speed Vertical Multistage Pumps (Max 460LPM)

    Grundfos CRIE 15 Variable Speed Vertical Multistage Pumps (Max 460LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable speed...

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    Grundfos CRIE 32 Variable Speed Vertical Multistage Pumps (Max 750LPM)

    Grundfos CRIE 32 Variable Speed Vertical Multistage Pumps (Max 750LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable speed...

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    Grundfos CRIE 45 Variable Speed Vertical Multistage Pumps (Max 1100LPM)

    Grundfos CRIE 45 Variable Speed Vertical Multistage Pumps (Max 1100LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable spee...

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    Grundfos CRIE 5 Variable Speed Vertical Multistage Pumps (Max 166LPM)

    Grundfos CRIE 5 Variable Speed Vertical Multistage Pumps (Max 166LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable speed ...

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    Grundfos CRIE 64 Variable Speed Vertical Multistage Pumps (Max 1600LPM)

    Grundfos CRIE 64 Variable Speed Vertical Multistage Pumps (Max 1600LPM) The CRIE pump is an in-line, multi-stage pump with a built-in variable spee...

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