fiesole,  firenze 
  • Booth: 24017

Come to DORIN booth for discovering NEW CO2 COMPRESSORS!!

Founded in 1918, Dorin is active in the field of refrigeration and air conditioning since 1932. Our products are manufactured according to the best mechanical and craft practices, at the very pursuit of our founder's motto: "The main thing is that our products are always perfect (Mario Dorin)."

After over 95 years of history, today Dorin is a consolidated industry, known throughout the world and continues to grow. Thanks to the decades-long and ongoing commitment to research, our solutions provide maximum energy saving and efficiency and are designed around the needs of customers,
with the assistance of professionals in engineering, finance and marketing. Your needs are our priorities!

 Press Releases

  • Ever since it appeared on the market it was clear that CD Series represented the new generation of compressors dedicated to the most stressful application: C02 transcritical commercial refrigeration.

    CD Series is already the widest range available on the market, but Officine Mario Dorin decided to give the possibility to our partners to select even bigger compressors with double advantages:

    • Reduction of compressors needed on the racks • Possibility to satisfy larger cooling capacity required Ideal solutions for:
    • large warehouses
    • food processing plant
    • industrial applications

    Therefore the new ranges CD500 and CD600 have been designed, a 6 cylinder solution for transcritical application that generates the absolutely largest refrigeration capacity range of compressors ever available nowadays on the market.

    These has been designed using the most modern calculation software such as FEM and 3D Modelling. Particular attention was paid to the heat exchange phenomena between the part of high and low pressure of the compressor leading to the adoption of an innovative design that optimizes the efficiency of the machine.           - Model CD6 800-45B

    The main characteristics of CD500 are:

    • Exclusive on the market 20 years of experience in transcritical application (more than 25.000 working transcritical compressors on the field)
    • Optimized piston head design with separation of HP/LP chambers
    • Frequency drive capability (4 pole design, special motor layout, optimized suction gas cooling)
    • Extra smooth operation (low pulsation and vibration)
    • Peculiar tribology solutions coming from the automotive industry
    • Optimized advance reversible oil pump lubrication

    • External discharge manifold (oil temperature reduction, compressor efficiency increase)

    • Displacement from 39,8 m3/h to 98.58 m3/hr the largest on the market

    Highly efficient and robust working values

    Optimized stroke-bore ratio for low deap volume and optimum flow cross section

    • Nominal power from 50 to 160 HP

    Design pressure: 100 bar (LP) e 150 bar (HP)

    • Safety valve on both low and high pressure sides

    The Range will also include few models in a double stage format.


  • CD500
    DORIN renewed its offer with CD500 range, made by 6-cylinder compressors with a motor power from 50 to 80 Hp and displacement from 39,8 up to 59,5 m3/h.


  • Considering the operating conditions of a transcritical CO2 compressor, it has been decided to develop a completely new compressor platform, without trying to modify a standard HFCs compressor. The design has been developed using the most modern solid modellation codes, like, forinstance,FEManalysis. Particular attention has been given to heat transfert phenomena between compressor HP and LP side. This led to the introduction of an innovative compressor design which permits extremely high COP values. Furthermore, to cope with the very challanging market requests, high desing pressure values havebeenchoosen,e.g.:
    • PSs= 100bar • PS = 150bar
    DORIN renewed its offer with CD500 range, made by 6-cylinder compressors with a motor power from 50 to 80 Hp and displacement from 39,8 up to 59,5 m3/h, allowing its users the possibility to contain spaces and the costs of refrigeration systems and/or heat pump by decreasing the number of compressors needed to obtain very interestingresults. The CD500 series is designed both for industrial applications but also for civil and commercial applications, taking advantage of the exceptional energy efficiency of CO2 as a refrigerant.
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