P0400YC-FOXBORO

控制阀与上、下游切断阀、旁路阀的连接控制阀上、下游切断阀和旁路阀应与控制阀同时安装。上、下游切断阀与控制阀之间的管段长度应考虑管路阻力和对流体流动状态的影响。直管段长度长，有利于流体经切断阀后的稳定，可使流体流动平稳，减少紊流影响，降低噪声；直管段长度短，流体经切断阀后还未稳定就进入控制阀，使噪声增强，但管段长度短有利于降低管路阻力，提高控制阀两端压降，使流量特性的畸变减小，有利于控制系统的稳定运行。因此，应权衡和综合考虑。通常，上游侧应有10D～20D的直管段，下游侧有3D～7D的直管段。D是管道公称直径，必要时应设置整流装置。

 

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