in the pipeline in the event of a motor change . The system does not need to be revalidated for pharmaceutical applications , thus minimizing maintenance requirements .
TOTAL DRAINAGE THROUGH ECCENTRIC DISCHARGE PORT AND INCLINED SURFACES
Criteria for the cleanability of pumps are primarily the absence of dead spaces and a cavitation-free design of all media contacting parts . This applies , among other things , to the installation space of the mechanical seal and the arrangement and dimensioning of the drainage system , which is essential to avoid any contamination . The fluid can already drain off completely with a surface inclination angle of 3 °. If GEA Hilge CONTRA pumps are installed vertically , this can be achieved even without the need for a drain valve .
NO-CAST COMPONENTS ARE EASY TO CLEAN
Material selection plays an equally important role for quality and safety in process control . Manufacturers therefore prefer high-quality stainless steels , which ensures hygiene , corrosion resistance and a long service life . In order to facilitate cleanability in hygienically sensitive applications , GEA relies on forged , deep-drawn and milled components instead of castings for media-contacting parts . Zickler : “ Because they are prone to cavitation , cast parts are particularly undesirable in the pharmaceutical industry . Their reduced cleanability makes reproducible , easy-to-clean production difficult .” However , both aspects were important parameters for GEA in the development of the pump . All materials have therefore been carefully selected for their use in hygienic processes . The casings are made of deep-drawn rolled or forged steel of grade 316L ( 1.4404 or 1.4435 ). The non-porous and cavitation-free surface enables different sterilization standards with surface roughness from Ra ≤ 0.8 µ m to Ra ≤ 0.4 µ m .
VERSATILE CUSTOMIZATION OPTIONS
The entire CONTRA range is characterized by a wide range of configuration options , allowing plant operators to use the pumps in a variety of applications . Whether installed horizontally or vertically , the GEA Hilge CONTRA III achieves a very high efficiency thanks to the precise operating point design and various impeller geometries . For pumps that are to be used in explosive atmospheres , the CONTRA is available in the Adapta variant . This design has EC conformity approval according to ATEX Directive 2014 / 34 / E .
FREQUENCY CONVERTER FOR VERSATILITY
Increasing the versatility of the GEA
Hilge CONTRA III , frequency converters are also an integral part of the hygienic concept . Pharmaceutical companies that also operate their plants under partial load and on weekends particularly benefit from speed control , as the water distribution system must be kept in motion continuously in order to prevent contamination , regardless of the actual operating phase . Frequency converters have a significantly lower heat effect on the pumped media compared to throttled centrifugal pumps . Less cooling is required as a result and energy costs are reduced . The sensitive media is protected from thermal damage .
More information can be found online at gea . com .
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