如果存在一个压力回路，或者疏水阀排放口位于回路管道的上方，则应该安装一个止回阀(图b)。
A check valve should be installed on return piping if there will be a pressurized return line or the trap drains to an overhead return line (Fig. B).
更新将受影响的地下疏水混入经许可的液态排放途径的ODCM和程序。
Updated the ODCM and procedures to incorporate the affected subsurface drain outfall into a permitted effluent release path.
安装在需要排放的设备下面，并靠近需要排放的设备，避免在疏水阀前面有很长的水平管道。
Install below and close to equipment being drained, avoid long lengths of horizontal piping ahead of trap.
应用推荐