1.Code applications to properly close and disconnect their connections prior to disconnecting or shutting down.
适当编写应用程序代码，以便在断开连接或关闭之前正确地关闭和断开它们的连接。
2.Before installation, check line of flow through valve so that valve will function properly. Close valve completely before installation.
安装前，切断通过阀门的流体，以使阀门工作正常。安装前要完全关闭阀门。
3.Relief valve does not properly close
安全阀没有完全关闭