译文：
疏水阀是蒸汽、凝结水管道系统的主要附件之一，起阻水和排气作用。如果疏水阀失灵，大量的蒸汽窜到凝结水管道里，不仅热量损失大，而且会产生“水击”，破坏管网；疏水阀堵塞，凝结水通不过或者流量变小，则用热设备达不到预期效果。 使用疏水阀，首先要注意选型。选型不当，会造成阻水和漏气现象。选择疏水阀，不能只从排水量考虑，也不能简单地根据查表套用，应该根据疏水量(凝结水量)与阀前后的压力差，按照阀门样本确定其规格及数量。 选用疏水阀时，必须按设备每小时的耗汽量乘以选用倍率2-3倍为{zd0}凝结水量，来选择疏水阀的排水量。才能保证疏水阀在开车时能尽快排出凝结水，迅速提高加热设备的温度。疏水阀排放能量不够，会造成凝结水不能及时排出，降低加热设备的热效率。 选用疏水阀时，不能以公称压力选疏水阀，因为公称压力只能表示疏水阀体壳承受压力等级，疏水阀公称压力与工作压力的差别很大。所以要根据工作压差来选择疏水阀的排水量。工作压差是指疏水阀前的工作压力减去疏水阀出口背压的差值。 选择疏水阀要求准确无误地阻汽排水，灵敏度高，能提高蒸汽利用率，不泄漏蒸汽，工作性能可靠，背压率高、使用寿命长、维修方便是{sx}的条件。 在生产工艺的换热设备，烘干室，快速热交换器，蒸馏设备等需要快速升温，不允许存有凝结水的生产加热设备，应该选用机械型疏水阀。 在蒸汽管道，伴热管线，采暖设备，温度要求不高的用汽设备，应该选用热静力型疏水阀。 在高温高压过热蒸汽管线和设备上，应该选用过热蒸汽专用疏水阀。

“ The correct selection and traps Note ”是由提供的国际阀门新闻，译文仅供参考。另外，中国疏水阀网还提供相关产品搜索：、、、、等。

原文：
Steam traps, condensate piping one of the main accessories, play the role of blocking water and exhaust. If the trap failed, went to a lot of steam condensation pipes hang on, not just heat loss, but it also will have a "water hammer" damage control network; traps blocking, not pass or flow of condensate becomes smaller, the use of heat equipment for the desired effects. Use traps, first note selection. Improper selection, will cause water resistance and the leakage phenomenon. Select trap, not only from the displacement of consideration, we can not simply apply under the look-up table, should be based on sparse amount of water (condensation water) and the valve pressure difference before and after, in accordance with the valve to determine its size and the number of samples. Steam traps, the equipment must be steam consumption per hour multiplied by 2-3 times the maximum use rate of water condensation, to select trap displacement. To ensure the trap discharge in the car as soon as possible condensation of water, rapidly increase the temperature of heating equipment. Trap emission energy is not enough, will cause condensation of water can be discharged in time to reduce the thermal efficiency of heating equipment. Steam traps, the traps can not be selected nominal pressure, because the nominal pressure that traps body shell can withstand the pressure rating, nominal pressure and working pressure trap very different. Therefore, according to the work of pressure to select trap displacement. Working pressure is the pressure of work before trap trap back pressure minus the difference. Choose the accuracy required to trap waste gas drainage, high sensitivity, can increase the utilization of steam, the steam does not leak, reliable performance, high back pressure, long life and easy maintenance is the preferred conditions. In the heat production equipment, drying room, fast heat exchangers, distillation equipment needs rapid warming, not a condensed water heating equipment should be chosen mechanical type steam traps. In steam pipes, heating pipes, heating equipment, temperature, do not ask for use of equipment, should use static type steam traps heat. Superheated steam at high temperature and pressure piping and equipment, should choose an exclusive steam traps.