Variable Frequency Drive System

CustomKraft’s Variable Frequency Drive (VFD) System also uses one pump per bay. Any cycle may be delivered to the bay with high-pressure, medium-pressure and low-pressure. Chemicals are selected using color-coded solenoid valves with lighted NEMA rated connectors. The chemicals initiate using high-pressure, when a lower-pressure cycle is selected; a delay timer activates the variable frequency drive to slow the drive motor to produce less pump volume, thus lowering the delivery pressure.


When a customer selects a low-pressure cycle, the VFD System runs at high-pressure until the chemical reaches the bay. This permits faster delivery to the customer and higher customer satisfaction. When the product reaches the spray tip, the system automatically switches to pre-selected delivery pressure. The unit initiates at high-pressure for each new selection.  Motor speeds are ramped up and down, eliminating the jolt associated with motor contactors/starters. 

CustomKraft VFD Advantages

  • Smooth operation of pump and motor, increasing bearing, shaft and motor life expectancy.

  • Ramping up to speed to reduce “inrush” electrical demand, reducing electrical billing rates.

  • May operate the same 3 phase motor with single or three phase input voltage and with virtually any electrical power supply.

  • Uses the same pump for the high-pressure, medium-pressure and low-pressure.

  • Single delivery hose per bay reduces installation time and eases maintenance.

  • WeepMizer freeze protection is used on single delivery hose, without overhead check valves.

  • Changeover time is reduced for low-pressure applications and is independent of chemicals being dispensed.

  • Eliminates many components including: in-bay check valves, low-pressure delivery pumps and poly hoses.

  • Low-pressure cycles may be delivered at higher application pressures.

  • Increases the reliability of the system by reducing the number of components.

  • CustomKraft’s equipment is ETL & CETL listed.