Open needle valve "b" and vent or bypass needle valve, bleeding to atmosphere, then closing needle valve "b" restores the system to a normal static condition.
There were no deaths or episodes of valve migration, tissue erosion, or significant bleeding.
未出现死亡、瓣膜移位、组织侵蚀或显著的出血。
3
An analysis of why the bleeding check valve of a 600 MW steam turbine-generator set couldn't readily shut during testing is being presented, together with means of improvement.