Your benefits
- Flexibility: individual solutions exactly according to customer requirements
- Vast knowledge: Pump specialist for canned motor pumps for over 50 years
- Long service life: no dynamic seals and non-contact running on hydrodynamic plain bearings
Application areas
- Production of vaccines
- Vaccine freezing process
- Bottling of vaccines
Production of vaccines against COVID-19 disease
Requirements
A reliable pump was sought for a refrigeration system designed in Germany for the production of vaccines that could ensure the long-term operation of the system without any failures. The vaccine is used to protect against COVID-19 disease. In the present case, the challenge was not in the operating point, the pressure range or the installation, but in the extremely low operating temperatures of –80 °C. The cast materials used as standard may become brittle at low temperatures. Therefore, the selection of suitable material was vital.
The pump used
In the present case, a customer-specific, multi-stage canned motor pump of the type CAM was used – the four-stage pump CAM 2/4 with AGX3.0 motor. The standard version of the HERMETIC CAM series can be used down to a maximum of –50 °C. Due to the low temperatures, the decision was made to use a stainless-steel design. This applies particularly to all parts that come into contact with the medium. An external frequency inverter was used to maintain the exact operating point and prevent power losses
Medium / refrigerant
The refrigerants Lobotherm BT are low-temperature transfer oils that consist of linear polydimethylsiloxanes and are available in varying viscosities. Lobotherm oils are also characterised by their environmental compatibility, low toxicity, low setting points and excellent corrosion properties. Due to the low setting point, the refrigerant can be used at temperatures down to –100 °C and is therefore used in refrigeration systems or freeze-drying processes using extremely low temperatures.
