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div.Section0{page:Section0;}高压阀门250系列，公称压力最高400公斤，口径最大DN500，最高温度500℃。 u 251单座阀，公称通径DN15至200，压力PN16至400，温度-250至+550℃； u 3252微流量单座阀，公称通径DN15至DN25； u 253三通阀，公称通径DN15至400，压力PN10至160，温度-250至+500℃； u 254带下导向的单座阀，适合超高压和高温的工况，公称通径DN80至400，压力PN16至400，温度-250至+550℃； u 255型多级轴向阀芯单座阀，用于平衡阀芯也解决不了的极高差压工况，带3或5级阀芯，用以逐级降低阀的总压降，因此，过高的压力降以及由此而产生的临界状态（如汽蚀）、 磨蚀和高噪音都可以避免。 u 256型角型阀，适合直角型安装要求的场合和有悬浮颗粒的介质，公称通径DN15至150，压力PN16至400，温度-250至+550℃。
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