Canned Motor Pumps for the Food Industry

In addition to the safety aspects, questions of environmental protection and plant efficiency also come into focus. HERMETIC supports plant manufacturers and the food industry with hermetically sealed canned motor pumps that perfectly combine safety, efficiency and environmental protection.

Serverraum-Kühlung in Frankreich

Requirements

This example plant in Lithuania processes mainly strawberries. The strawberries are frozen gently to retain the taste after picking and to be able to sort them better by size. Leakage of coolants must be prevented to rule out contamination of the strawberries. Production takes place without interruption, which means that maintenance of the system must be reduced to the bare minimum.

A CO₂ / NH₃ cascade system with a capacity of 970 kW is used. This system has typically two separated cooling circuits, a CO₂ circuit at –40 °C and an NH₃ circuit at –10 °C.

The pump used

The system uses a HERMETIC canned motor pump CNF40-160 with AGX3.0 motor. This is a standard and inexpensive, single-stage canned motor pump that is available immediately. The single-stage pump series is particularly suitable for high delivery rates and medium pumping heads. A Q_max orifice made it possible to achieve exactly the desired operating point and the maximum delivery rate at the same time.

In addition to the optimum technical pump design, the plant manufacturer was particularly impressed by the long maintenance-free service life, the good price-performance ratio and the excellent customer advice by the HERMETIC sales service.

Medium / refrigerant

Ammonia is the primary and most widely used refrigerant worldwide in industrial refrigeration applications. It is mainly used in large installations such as deep-freezestores, abattoirs, breweries, central refrigeration in the chemical industry and ice rinks. Cascade systems where CO₂ and ammonia are used in parallel are becoming increasingly popular. The advantages of ammonia are its large specific enthalpy of vaporisation, its environmentally friendly properties and many years of experience as a refrigerant.