本SAE航空航天推荐规程（ARP）为弹簧加载常闭液压止回阀的设计和试验要求提供了建议。止回阀适用于额定系统压力高达5000 psi（34500 kPa）的民用或军用飞机液压系统。

This SAE Aerospace Recommended Practice (ARP) provides recommendations for the design and test requirements for a spring-loaded, normally-closed hydraulic check valve.The check valve is intended for use in a civil or military aircraft hydraulic system with a rated system pressure up to 5000 psi (34500 kPa).