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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.

  • Lowara SVE Smart Vertical Multistage Pump with VFD Controller Product Name: 3SVE09F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 3SVE11F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 3SVE17F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 5SVE06F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 5SVE08F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 5SVE12F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 10SVE03F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 10SVE04F022T Vertical Multistage Pump - 3 P
    Lowara SVE Smart Vertical Multistage Pump with VFD Controller Product Name: 3SVE09F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 3SVE11F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 3SVE17F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 5SVE06F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 5SVE08F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 5SVE12F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 10SVE03F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 10SVE04F022T Vertical Multistage Pump - 3 P
    $5,160.00 - $6,240.00
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    Lowara 5SVE Series Smart Vertical Multistage Pump with VFD Controller (Max 150LPM)

    Lowara 5SVE Smart Vertical Multistage Pump with VFD Controller (Max 150LPM) - 3 Phase The Lowara e-SV vertical multistage pump is a highly reliab...

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  • $14,955.00 - $14,955.00
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    Lowara 10HME03 1.50kW Hydro-Boost Duo Variable Speed Pressure Pump System (Max 550LPM)

    Lowara 10HME03 1.50kW Hydro-Boost Duo Variable Speed Pressure Pump System  DOWNLOAD PRODUCT BROCHURE The Lowara 10HME Hydro-Boost Duo Pump S...

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  • $12,425.00 - $13,630.00
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    Lowara 5HME Hydro-Boost Duo Variable Speed Pressure Pump System (Max 350LPM)

    Lowara 5HME Hydro-Boost Duo Variable Speed Pressure Pump System  DOWNLOAD PRODUCT SPECIFICATIONS The Lowara 5HME Hydro-Boost Duo Pump Set is...

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  • $12,375.00 - $13,980.00
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    Lowara 3HME Hydro-Boost Duo Variable Speed Pressure Pump System (Max 175LPM)

    Lowara 3HME Hydro-Boost Duo Variable Speed Pressure Pump System  DOWNLOAD PRODUCT SPECIFICATIONS The Lowara 3HME Hydro-Boost Duo Pump Set is...

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  • Lowara 10SV Hydro-Boost Solo Variable Speed Pump with 40mm Manifold & 35L Pressure Tank Product Name: 10SV04 1.50kW
    Lowara 10SV Hydro-Boost Solo Variable Speed Pump with 40mm Manifold & 35L Pressure Tank Product Name: 10SV07 3.00kW
    $8,375.00 - $12,650.00
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    Lowara 10SV Hydro-Boost Solo Variable Speed Pump with 40mm Manifold & 35L Pressure Tank (Max 250LPM)

    Lowara 10SV Hydro-Boost Solo Variable Speed Pump with 40mm Manifold & 35L Pressure Tank  DOWNLOAD PRODUCT BROCHURE The Lowara Hydro-Boos...

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  • Lowara 5SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank Product Name: 5SV08 1.10kW
    Lowara 5SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank Product Name: 5SV12 2.20kW
    $7,715.00 - $9,925.00
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    Lowara 5SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank (Max 140LPM)

    Lowara 5SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank  DOWNLOAD PRODUCT BROCHURE The Lowara Hydro-Boost...

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  • Lowara SVE Smart Vertical Multistage Pump with VFD Controller Product Name: 3SVE09F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 3SVE11F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 3SVE17F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 5SVE06F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 5SVE08F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 5SVE12F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 10SVE03F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 10SVE04F022T Vertical Multistage Pump - 3 P
    Lowara SVE Smart Vertical Multistage Pump with VFD Controller Product Name: 3SVE09F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 3SVE11F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 3SVE17F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 5SVE06F011T Vertical Multistage Pump - 3 Phase - 1.1kW, 5SVE08F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 5SVE12F022T Vertical Multistage Pump - 3 Phase - 2.2kW, 10SVE03F015T Vertical Multistage Pump - 3 Phase - 1.5kW, 10SVE04F022T Vertical Multistage Pump - 3 P
    $5,075.00 - $6,125.00
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    Lowara 3SVE Series Smart Vertical Multistage Pump with VFD Controller (Max 80LPM)

    Lowara 3SVE Smart Vertical Multistage Pump with VFD Controller (Max 80LPM) - 3 Phase The Lowara e-SV vertical multistage pump is a highly reliable...

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  • Lowara 3SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank Product Name: 3SV08 0.75kW
    Lowara 3SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank Product Name: 3SV09 1.10kW
    $7,385.00 - $8,870.00
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    Lowara 3SV Hydro-Boost Solo Variable Speed Pump with 32mm Manifold & 18L Pressure Tank (Max 70LPM)

    Lowara 3SV Hydro-Boost Solo Variable Speed Pump Set on 32mm Manifold  DOWNLOAD PRODUCT BROCHURE The Lowara Hydro-Boost® range of variable sp...

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  • Lowara Ecocirc XL-Plus High Efficiency Variable Speed Circulator Pumps Product Name: Lowara Ecocirc XL Plus 32-80 (B) DN32 220mm L, Lowara Ecocirc XL Plus 32-100 (B) DN32 220mm L, Lowara Ecocirc XL Plus 32-120 (FB) DN32 220mm L
    Lowara Ecocirc XL-Plus High Efficiency Variable Speed Circulator Pumps Product Name: Lowara Ecocirc XL Plus 32-80 (B) DN32 220mm L, Lowara Ecocirc XL Plus 32-100 (B) DN32 220mm L, Lowara Ecocirc XL Plus 32-120 (FB) DN32 220mm L
    $3,635.00 - $5,190.00
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    Lowara Ecocirc XL-Plus High Efficiency Variable Speed Circulator Pumps

    Lowara Ecocirc XL-Plus High Efficiency Variable Speed Circulator Pumps DN32 220mm Length   DOWNLOAD PRODUCT BROCHURE The new Lowara ecocirc ...

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  • Grundfos MAGNA1 N Circulator Pump with Integrated Variable Speed Product Name: Grundfos MAGNA1 25-60 N (G 1 1/2" Connection), Grundfos MAGNA1 25-120 N (G 1 1/2" Connection), Grundfos MAGNA1 32-60 N (G 2" Connection), Grundfos MAGNA1 32-120 N (G 2" Connection), Grundfos MAGNA1 40-60 F N (DN 40 Connection), Grundfos MAGNA1 40-120 F N (DN 40 Connection), Grundfos MAGNA1 50-120 F N (DN 50 Connection)
    Grundfos MAGNA1 N Circulator Pump with Integrated Variable Speed Product Name: Grundfos MAGNA1 25-60 N (G 1 1/2" Connection), Grundfos MAGNA1 25-120 N (G 1 1/2" Connection), Grundfos MAGNA1 32-60 N (G 2" Connection), Grundfos MAGNA1 32-120 N (G 2" Connection), Grundfos MAGNA1 40-60 F N (DN 40 Connection), Grundfos MAGNA1 40-120 F N (DN 40 Connection), Grundfos MAGNA1 50-120 F N (DN 50 Connection)
    $2,110.00 - $6,125.70
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    Grundfos MAGNA1 N Circulator Pump with Integrated Variable Speed

    Grundfos MAGNA1 N Circulator Pump with Integrated Variable Speed The Grundfos MAGNA1 circulator pump is the simple option for a job well done. With...

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  • $4,449.75 - $17,949.10
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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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  • $7,258.25 - $27,576.60
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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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  • $11,265.10 - $26,794.55
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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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  • $3,249.50 - $9,835.35
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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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  • $13,316.20 - $25,993.40
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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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