The Pick n Pay Group is one of Africa’s largest and most consistently successful retailers of food, general merchandise and clothing. The group has a total of over 770 stores, made up of Hypermarkets, Supermarkets and Family Stores. Matador Refrigeration and GEA worked together, in order to provide an optimal refrigeration system to the flagship store of the Pick n Pay Group, called The Falls. The store is located in Roodepoort, in a suburb of Johannesburg (South Africa).

Subcritical cascade-type system equipped with semi-hermetic GEA compressors

The refrigerating plant at The Falls store is a R134/CO2 sub-critical cascade-type system, that ensures reliable, cost effective and energy efficient installations for the Pick n Pay Group. Thus, optimal refrigeration is provided to all cabinets of the supermarket. In general, these cabinets are equipped with meat, vegetables, fish, candys and other food.

In the following, you can find some interesting facts about the installation of the system.

Medium-temperature system

  • Refrigerant: R134a
  • Suction temperature: -10°C
  • Condensing temperature: +43°C
  • Equipment of the system: 2 multiplex racks fitted with 6 x GEA HGX6 compressors
  • Refrigeration requirement: 648,77 kW

The unique design allows for cooler liquid refrigerant being supplied to the evaporators, maximizing their efficiency and contributing to the already energy-efficient plant.


Low-temperature system

  • Refrigerant: R744 (CO2)
  • Suction temperature: -32°C
  • Condensing temperature: -5°C
  • Equipment of the system: 1 multiplex rack fitted with 3 x GEA HGX22P CO2 subcritical compressors
  • Refrigeration requirement: 70,9 kW

The condensing of the low temperature system is done via a plate heat exchanger on one of the medium temperature systems. This is known as a cascade system.


GEA compressors working with the natural refrigerant R744 (CO2)

Within refrigeration technology, carbon dioxide (CO2) is known by the name R744 and has a long history. It is a colorless gas which liquefies under pressure and has a slightly acidic smell and taste. Carbon dioxide has no ozone depletion potential (ODP = 0) and a negligible direct effect on global warming (GWP = 1) when used as a refrigerant in closed systems. It is not combustible, is chemically inactive and heavier than air. Carbon dioxide has a narcotic and asphyxiating effect on humans only at higher concentrations. Carbon dioxide is available naturally in large quantities.

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Dear partners,

We would like to inform you that in the framework of preventive measures aimed at effectively addressing the spread of “Covid19” disease and in accordance with the National Public Health Organization guidelines (, our company is committed to ensure public health, safety of its partners and employees. Therefore we have recommended the fulfillment of our employees' tasks through teleworking.

The duration of this measure is initially set from 17.03.2020 to 30.04.2020

The design provides full operation, but due to special conditions, delays in specific tasks or communication may occur.

Our company will strive to keep its operation uninterrupted and secure by serving its clientele in ways and timeframes that are judged possible.

We thank you for understanding and we remain at your disposal.

Αγαπητοί Συνεργάτες,

Θα θέλαμε να σας ενημερώσουμε ότι στο πλαίσιο μέτρων πρόληψης με σκοπό την αποτελεσματική αντιμετώπιση εξάπλωσης του κορωνοιού και σύμφωνα με τις οδηγίες υγιεινής & ασφάλειας που έχει ορίσει ο ΕΟΔΥ (, η εταιρία μας για να διασφαλίσει τη δημόσια υγεία, την ασφάλεια των συνεργατών και των εργαζομένων της, συστήσαμε την εκπλήρωση των καθηκόντων των εργαζομένων μας, μέσω τηλεργασίας.

Η διάρκεια του συγκεκριμένου μέτρου ορίζεται αρχικά από τις 17.03.2020 έως τις 30.04.2020

Ο σχεδιασμός προβλέπει πλήρη λειτουργία, ωστόσο εξαιτίας των ειδικών συνθηκών, ενδέχεται να παρουσιαστούν καθυστερήσεις σε συγκεκριμένες εργασίες ή και στην επικοινωνία.

Η εταιρία μας θα προσπαθήσει να διατηρήσει αδιάληπτη και ασφαλή την λειτουργία της, εξυπηρετώντας το πελατολόγιο της με τρόπους και σε χρονικά πλαίσια που κρίνονται δυνατά.

Σας ευχαριστούμε για την κατανόηση και παραμένουμε στην διάθεση σας.