The trend in compressor development is towards improved efficiency. Refrigerant, heat pump and air conditioning compressor manufactures are primarily aiming for better energy efficiency paralleled with improvements in compression, volumetric and mechanical efficiency. The demand for more reliable function of the whole compressor system is steadily rising. Practical compressor tests indicate, that valve components can be considered as the most critically loaded compressor parts. Their durability is determined by the fatigue properties of the entire valve system and applied stresses.
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