[PVC背压阀]-UPVC背压阀,塑料背压阀
背压阀安装于计量泵的正压排放管路上，防止虹吸现象的发生，消除由于投加点压力波动造成的投加量变化，在现场取下调整螺丝上的保护帽，旋转调整螺丝，借助管路中的压力表可调至所需压力，可通过调节螺丝在0-0.6Mpa范围内设置背压。和脉冲阻尼器配合使用减少水锤对系统的损坏，保持泵的出水口到背压阀有一定的恒压，保持系统流速均恒。
口径；DN15,DN20,DN25、DN32、DN40;
设定背压范围：0.03-0.6Mpa.
安全阀
隔膜、阀芯由内部弹簧压紧顶住阀座，当系统管路内压力超过预设定的压力时，隔膜、阀芯被顶起，介质泄出至回流管及容器，在现场可通过调节螺丝借助管路中的压力表在0-1.0Mpa范围内设置压力，泄放压力一般设置高于系统压力0.1-0.2Mpa,安全阀调压不允许超过计量泵的最压力，安装一般尽量靠近泵的出口处，泵与安全阀之间不应有任何阀门。保护泵的安全和系统的正常运行。
口径;DN15,DN20,DN25、DN32、DN40;
工作压力最大1.0Mpa,
设置范围：0.03-1.0Mpa
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规格HLDdzh
DN15181175822012327
DN20181174822512329
DN251982021073215233
DN321982511074019235
DN401982721075020642
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