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Over the past decade, radial compressor valves and unloaders have been successfully introduced into reciprocating compressors for the gas transmission industry. The unique radial valve system seats multiple rows of poppets over ports in a cylindrical sleeve the replaces the traditional cage and single deck valve used in a reciprocating compressor. The radial valve concept had been applied for both suction and discharge valves in a broad range of compressor models and pipeline cylinder classes. Use of these valves has resulted in significant increases in efficiency and reductions in HP/MMSCFD. For cylinder end deactivation, the cylindrical valve guard is moved to slide the poppets off their seats and away from the ports, providing a relatively unobstructed flow path for the gas. The resulting parasitic losses of the deactivated cylinder end approach the losses achieved by complete removal of a traditional valve. Use of radial valves has also been found to significantly increase unit capacity. Some of this increase stems from being able to operate the more efficient radial valve compressor with less unloading, so that there is more effective displacement utilized for the same power input. Moreover, in practice the significant added fixed volumetric clearance inherent in the radial poppet valves hasnot reduced the measured volumetric efficiency or the capacity as much as traditional theory would predict. This paper will present four case studies that show the actual field performance improvements obtained with radial poppet valves on both low speed and high speed compressors, along with laboratory test comparisons and an explanation of why the capacity can increase even though the fixed clearance increases.
Your Price $195.00
List Price $195.00