The full geometry of both the impeller and the pump casing was studied via CFD and redesigned with a view to the largest possible free passage and minimal product damage in the widest possible working area. The result of months of CFD study and several practice tests is a range of four pump types with a significantly larger pump casing but with the same mounting dimensions as the VDKM pumps (except for type 150-400).
The principle remains a complete stainless steel pump, like the Packo standard dictates. Cleanability, corrosion resistance and more strict hygiene requirements, after all, are gaining importance.
The pump will be on show at Fruitlogistica, Berlin 3. – 5. January 2016 7.1b/A-02
A second intervention replaces the traditional channel impeller with an impeller with a single vane, which was specially developed by Packo for this pump series. The design of the vane plays a key role in the performances of the new VPCP pump. It also leaves a large free passage and is designed to keep product damaging minimal. Research showed that by omitting the channel geometry the product damage is minimal over a much wider area (flow and speed). A typical single channel impeller only shows a low product damage in a small zone around the BEP (Best Efficiency Point).
Test results prove 250% less product damage
In order to evaluate and compare the product damage objectively Packo Pumps developed a test method that produces a dimensionless damage figure. The damage figures are both a quantitative (% of products being damaged by the pump) as qualitative (how serious is the damage?) weighing of the damage. The new VPCP pump scores a damage figure of 9.5. In comparison, the known VDKM pump registered a damage figure of 25.5. We can therefore state that the product damage in the new generation VPCP pumps is 2.5 times smaller than in the VDKM pumps. Also pumps with conventional 1-channel impellers were subjected to the same test. No single pump scored a damage figure below 14. We can therefore confidently say that the VPCP pump series sets a new benchmark in terms of product damage.
In addition to the pump hydraulics, also the structure of the pump itself was taken in hand. The versions with larger motor capacities were shortened 75mm, which makes the pump not only more compact, but also makes the shaft much stiffer and eventually benefits the life time of the mechanical seal. Because field tests confirmed the durability of a single seal, the new generation of pumps will not be equipped with an oil bath around the shaft seal anymore.
Target market of the VPCP pump series
The Packo VPCP pump range is designed for pumping potatoes, vegetables, like broccoli, cauliflower, sprouts, etc. The VPCP pump can e.g. be used in Belgian fries process lines and for the transport of vegetables to the blanching lines.
Because the pump has the same dimensions as the known VDKM pump
series it is easily interchangeable.