All pumps of the standard versions from the D 4 B to the D 25 B model are equipped either with single-phase or three-phase motors. D 40 - 65 B models are equipped with three-phase motors. Moreover, all pumps of the B series are available also without the motor. The TRIVAC B range is a modular system which divides into three groups: TRIVAC 4/8 Series, TRIVAC 16/25 Series, TRIVAC 40/65 series.