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Since 1946 Dott. Ing. Mario Cozzani srl has been designing and producing automatic valves and unloading systems for reciprocating compressors. The main products are suction, discharge, concentric and reed valves, non return valves and suction valve actuators for the unloading of the compressor.

The technical department of Dott. Ing. Mario Cozzani srl identifies and develops solutions making use of the wide range of valves with which it has long experience over so many years of activity, continuously customizing and innovating. The use of advanced calculating programs together with experience, enables it to choose the solution that optimises performance on the one hand and the life of the valves on the other.

The valve designing is made with the support of advanced softwares: 3D modelling systems, CFD fluidodynamic and FEM structural analysis software and valve dynamic simulators developed by Dott. Ing. Mario Cozzani srl itself. The constant research to increase compressor performance in terms of efficiency and lifetime involves the calculation of fluidodynamic efficiency of different flow passages through the valve and the valve design integrated in the cylinder, in close synergy with compressor manufacturers. In this way, the technical support we can offer to our OEM customers includes CFD simulations of suction and discharge cylinder ducts as well as dynamic multiphase simultaneous simulations.
These capabilities enable our company to optimize the valves not only for new compressors, but also for existing ones by carrying out revamping engineering in collaboration with the compressor manufacturer.

In order to assure high valve performances, designing is associated to the continuous research of new materials, that extends from special steels to different types of treatment or covering to innovative plastic materials.

Design and ProductionThe here shown types of valves are just amongst the most used ones, they do not include all types of valves, that extend to a wide range of special solutions. The competence of choosing the type of valve most suited to the specific use amongst the various types, illustrated and not, relies exclusively on our technical department. It finds the best technical solution according to the compressor working conditions and complying when necessary to international norms such as API 618 and NACE MR0175. Since May 2002 the check valves are been designed and produced according to the European norm 97/23/CE (P.E.D.). If requested, the unloaders comply with the ATEX norm. Whatever the selected type, the valves are anyway adaptable to the external dimensions which should already be defined by the compressor manufacturer.

Dott. Ing. Mario Cozzani srl valves can have approximate diameters ranging from 20 to 500 mm, with safety guard or open guard. According to their use, Cozzani valves are produced in a wide range of materials, such as carbon steel, austenitic stainless steel, martensitic stainless steel, precipitation-hardening stainless steel, special alloys (Monel®, Hastelloy®, Inconel® etc.) as well as different types of thermoplastic materials (Nylon, PTFE, PEEK™, VESPEL® etc.)