Officine mario dorin s.p.a. is an italian family business (founded in compiobbi in 1918), high-quality refrigeration and air conditioning technology from 1932 and is today one of the world's leading manufacturers of semi-nutretic compressors and condensing sets. the company with branches in 55 countries provides about 4,000 compressors per month and generates sales of around eur 35 million annually. officine mario dorin s.p.a. offers its international customers a complete range of semi-nutretic, open and two-stage compressors. overall, more than 70 models are available with nominal outputs between 0.4 hp and 150 hp for use with fully and partially halogenated refrigerants. technically perfect semi-thermetic compressor of the dorin brand work highly efficient even with extreme operating conditions. dorin compressors are characterized by efficiency, reliability and robustness as well as extra-high quality. quality represents part of the company philosophy: "the important thing is that our products are always perfect" (mario dorin). the valve plates for dorin compressors are manufactured by hoerbiger kompressortechnik gmbh. dorin product range was certified by lloyd's register quality assurance to iso9001-2000 (lrc 170322). all compressors comply with the european policies: en 292-1 / -2, en 294, en 60204, pren 349, en 60529, iec 336-1 and iec 335-2-34. the structure of the type number of dorin compressors is as follows :