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<h1>2800C防火阀</h1>
<p>时间?018-6-23 0:00:00</p><p>来源?a href='//www.monarclatinamerica.com/supply/1.html'>//www.monarclatinamerica.com/supply/1.html</a></p>
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<a href="//www.monarclatinamerica.com/supply/1.html" target="_blank">2800C防火阀</a>，常开?00C或?800C关闭，一般安装在风管穿越防火墙和结构变形缝处，起火灾控制作用，可以设置输出电讯号，温度超?00C或?800C时阀门关闭，联动送（补）风机关闭，安装在中央空运风道系统中，工作原理是利用阀门上安装的极易熔合金的温度控制，利用重力作用和弹簧机构的作用，当火灾发生时，火焰入侵风道，高温使阀门上的易熔合金溶解或使记忆合金产生形变使阀门自动关闭，用于风道与防火分区贯穿的场合?
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2800C防火阀是一种常闭型阀门，由控制中心?4V直流电开启或手动开启，?80℃时自动关闭，复位必须手动。它的作用是：当烟气温度达到280℃时，人已基本疏散完毕，排烟已无实际意义，而烟气中此时已带火，阀门自动关闭，以避免火势蔓延。系统的排烟风口也可以用常闭型的防火排烟口，取消支管上的排烟防火阀。火灾时，该风口由控制中心?4V直流电开启或手动开启，当烟温达?80℃时自动关闭，复位也必须手动。排烟风机房入口也应安装排烟2800C防火阀，以防火势蔓延到风机房所在层?
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