Beverage pumps

Beverage pumps are used for a wide range of products. Hygienic stainless steel pumps are used to convey foodstuffs. The range of products conveyed by beverage pumps is wide, from watery end products to highly viscous frozen concentrates. They pump both products with delicate pieces of fruit and media with sensitive cell structures, such as yeast. The range of applications is huge.

Beverage pumps are required to pump raw materials, and for finished products for transfer pumping, mixing and loading processes within the production facilities. Mobile pumps are sometimes used on trucks or ships. With their outstanding flexibility, HYGHSPIN twin-screw pumps stand out in the beverage industry. Because they have a wide range of speeds, the same pump can be used to pump both low-viscosity juices and high-viscosity concentrates effectively and virtually free of pulsation. Through the principle of axial pumping and low product speeds in the pump, stresses on sensitive media are reduced to a minimum.

At the same time, HYGHSPIN twin-screw pumps can also be used as CIP feed pumps, simplifying the system layout considerably.

Beverage pumps are often used in batch processes. For transfer pumping and loading processes at tank farms, a fast process is an advantage, as it requires high volume flow rates. At the same time, however, the NPSH values for the beverage pump used must always be considered. These are often the limiting factor for the process as a whole. Increasing volume flows increase pressure losses in the suction line, causing the NPSH value for the system to fall. If the critical value specified by the beverage pump is reached, no further increase in volume flow is longer possible because the pump cavitates and is damaged. The hallmarks of HYGHSPIN twin-screw pumps are low NPSH values and a high pumping speed. In many cases, the capacity of the existing system could be increased significantly without further adjustment by replacing the existing beverage pumps with HYGHSPIN twin-screw pumps, resulting in considerable savings in operating costs.

With a suitable mode of operation in conjunction with an appropriate system layout, HYGSPIN twin-screw pumps are self-priming. Self-priming beverage pumps are required for example where smaller containers with raw materials need to be emptied. Shaft seals for beverage pumps should be selected carefully. Many products have a substantial sugar content. As a result, there is a risk with beverage pumps that the sliding surfaces of the mechanical seals will adhere to each other. Torque transmission during the start-up process creates a risk that the stationary part of the seal will break away and the mechanical seal will fail. Mechanical seals with reduced sliding surfaces in a knife-edge design have therefore proven themselves effective for beverage pumps. As a result of the reduced areas, transmissible torque and the risk of failure fall sharply. Alternatively, pumps with self-lubricating lip seals can also be used. Because they allow the pump to run dry without flushing the shaft seal, lip seals are particularly advantageous for mobile pump units.