Knoll Maschinenbau GmbG

KNOLL’s MX with EHEDG Approval


For machinery and equipment that are used in the production of food, compliance with EHEDG (European Hygienic Engineering & Design Group) is a mandatory standard which has gained wide application even beyond Europe. This is also true for pumps used in food production.

The basic aim of the EHEDG directive is to prevent the microbial contamination of food. Thus, the microbiological safety and quality of the food is taken into account. The guidelines relate to the structural design, surface finish, the materials used, cleaning ability and the prevention of penetration and the growth of microorganisms in the machinery and equipment.

As we’ve reported here on the blog, the MX-Pump is certified to EHEDG. KNOLL Maschinenbau was awarded the accompanying certificate in June 2010. A remarkable design feature of the pump was noted during the examination by the Research Centre Weihenstephan for Brewing and Food Quality of the Technical University (TU), Munich. It’s the fact that the MX, thanks to its aseptic design, usually is cleaned without an additional CIP-Pump.

Therefore bypasses and valves can be omitted. In most cases these only form unwanted dead spaces, which get traversed only in the cleaning process.

A further  hygienic advantage is the self-cleaning effect oft the MX-Pump: For emptying the pump its suction casing is fitted with a special suction nozzle that is welded horizontally and tangentially, so that the effect of self-draining occurs on the suction housing as well as on the progressive pressure joint.