KRAL Screw Pumps
Good control capabilities
The delivery rate of a screw pump depends strongly on the speed. If the delivery rate has to be varied, a controller has to change the rotational speed. The complexity of the controller design depends on the delivery rate characteristics of the screw pump. In contrast to many other functional principles, KRAL screw pumps have linear delivery rate characteristics. Therefore they can be controlled simply and inexpensively by means of a frequency converter.
Pressure pulsations of the liquid can damage the screw pump, the system and the pumped liquid. The strength of the pulsation depends on the functional principle of the pump. Piston and gear pumps cause considerably more pulsations than a screw pump. The KRAL screw pump feed method conserves product. The pumped liquid is not pressed, there are no pressure pulses that can damage the piping and other components or trigger vibrations. In addition, KRAL screw pumps are very quiet.
KRAL screw pumps have clear technical advantages
Pumping liquids is a demanding task.
When selecting and dimensioning a screw pump, the pumped liquid, the operating conditions, the installation site as well as the standards, guidelines and directives have to be taken into consideration. A wealth of knowledge is required in order to avoid errors.
KRAL screw pumps have existed since 1950. The acquired experience is passed on from generation to generation and extended continuously. Thus ensuring employees with excellent knowledge and further training. Our customers profit from our advisory skills.