本文研究了上游流量变量与止回阀流量特性的关系。讨论了气穴现象、振动和噪声、完全打开阀门所需的最小流量、内部运动和部件磨损。在设计、应用和使用旋启式止回阀时，应考虑这些影响。包括2个参考文献、表格和图表。

The relationship of upstream flow variables to the flow characteristics of check valves is examined in this paper. The phenomena of cavitation, vibration and noise, minimum flow required to open the valve fully, internal motion, and wear of the components are discussed. These effects should be considered in the design, application, and use of swing-check valves. Includes 2 references, table, figures.