Increasing pressure in booster pump

As with all pieces of equipment driven by an electric motor, it is possible to save energy if a booster pump is equipped with a variable frequency drive (VFD) for speed control. For fractional horsepower motors, such as those used in small residential applications, electronically commutated motors (ECMs) are more cost-effective option than VFDs.
There are several reasons why it makes sense to deploy speed control for a booster pump:

• The required pressure boost may vary depending on current building conditions. For example, it may not be necessary when demand for water is low.
• Pressure variations may also be caused by the utility company. For example, low pressure issues may only be present when the water distribution system is experiencing peak demand.
• Variable frequency drives can be used to soft-start a water booster pump, preventing the inrush current, which is typically five to eight times higher than rated current. In absence of a soft-starting device, this inrush causes a sudden drop in voltage, which can damage sensitive electronic devices.

When a water booster pump is equipped with speed control, its operation can be adjusted in real time in response to building and water supply conditions, maximizing energy efficiency. In fractional horsepower applications, electronically commutated motors offer the highest energy efficiency available while offering built-in speed control. For pumps of higher horsepower, which are typically used in commercial applications, the best possible combination is having a three-phase motor with NEMA Premium efficiency equipped with a variable frequency drive.

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