中文摘要：

压缩机是化肥生产中的关键设备，对产能、电耗及安全生产起着至关重要的作用。气阀对压缩机的性能有着重要影响，被称为压缩机的“心脏”。理论与实践表明，对压缩机气阀进行分析与改造，能有效降低压缩机的电耗，提升压缩机的排气量，保障压缩机安全可靠运行。

英文摘要：

The compressor is critical equipment in fertilizer production, it plays a vital role in production capacity, power consumption and safety in production. The air valve has an important influence on performance of compressor, it is called the heart of compressor. Theory and practice show that analysis and revamp of air valve of compressor can reduce compressor power consumption, increase compressor displacement and ensure safe and reliable operation of compressor.