双金属片式疏水阀的热敏元件为两种不同膨胀率的金属通过特殊工艺压铸一起的双金属片，双层金属片在受热后膨胀，由于不同的膨胀率使其产生的弯曲。利用这种特性制作成疏水阀的热敏元件起到开关作用。双金属片式疏水阀分为不可在线调节（BK，CS17H和CS47）和可在线调节（可调双金属片式TB）。
The thermo-sensitive element of bimetallic trap is a bimetallic element cast through a special process by two metals of different expansion ratio.When the bimetallic element expands after heated,different expansion ratio results in bending.The thermo-sensitive element produced on the basis of this quality can act as a switch.Bimetallic Traps are divided into adjustable offline (BK,CS17H and CS47) and online (adjustable bimetallic element TB).
优点：
1、结构简单，容易安装和维修，抗水击，排空性能*。
2、利用高温凝结水形成水封，没有新鲜蒸汽泄露（零泄露）。
3、动作灵敏，无噪声。
4、抗水击，对压力突然变化没有影响。
5、可用于过热蒸汽系统。
6、可以使用高压高温的蒸汽管线。
7、具有良好的排空气性能，不怕冻。
Merits
1.Simple structure,easy to install and maintain,resistant to water hammer and superb emptying performance.
2.Water seal by high-temperature condensate,no leakage of fresh steam (zero leakage).
3.Flexible and noiseless.
4.Water hammer resistance with no effect from abrupt pressure changes.
5.Adoptable for overheat steam system.
6.Adoptable for high-pressure and high-temperature steam pipes.
7.Good air discharge quality with resistance to coldness.
双金属片式疏水阀/BIMETALLIC TRAP
技术参数/Technique parameter
| 壳体压力等级 Shell pressure grade | 负荷泄漏率 Load leakage | 使用介质 Used medium | 允许背压率 Permitted backpressure rate | 节能效果 Energy saving effect | 适用过热蒸汽 Use superheated steam |
| 1.6、2.5、4.0、6.4、10MPA | 0% | 蒸汽、凝结水 Steam、Condensate water | ≥75% | 优秀 Excellence | 适应 Adaption |
| 工作压差 Maximum operating pressure differential | 抗冻性 Freezing resistance | 排水方式 Drainage method | 允许温度 Maximum allowable temperature | 排空气装置 Air exhaust system | 抗水击 Resis |
| 10.0MPA | 优秀 Excellence | 连续方式 Continue mode | 420~550℃ | 自动 Automatic | 适应 Adaption |
外形尺寸和重量/Prime out-form dimensions and weigh
| 产品型号 Product model | 口径(DN) Calibre | L法兰 Flange | L螺纹/焊接 Thread/welding | H1 | H2 | W | 重量(kg) weight | 使用压力范围(MPa) Pressure change range | 公称压力(MPa) Nominal pressure |
| BK271 BK274 BK276 | 15~20 25 | 210 230 | 130 | 105 | 25 | 105 | 5.5/8.3 | 0.1-6.4 | 6.4 |
主要零件材料/The materials of primary accessories
| 零部件名称 Part and component name | 材质Material |
| 阀体、阀盖 Valve body、Valve cover | 碳钢、合金钢 Carbon steel、Alloy steel |
| 双金属片 Bimetal | 不锈钢金属 Stainless steel |
| 阀座 Valve seat | 不锈钢 Stainless steel |
| 阀杆 Valve rod | 不锈钢 Stainless steel |
| 过滤网 Filtrating screen | 不锈钢 Stainless steel |
注解
1、选型时请提供工作压力、工作压差、凝结水发生量、工作温度、连接方式及标准。
2、凝结水负荷的安全系数一般为2～3倍。
3、正确安装、定期保养清除阀内污物，保证疏水阀正常工作和延长使用寿命。
Note
1.Please provide operating pressure and operating pressure difference,generating quantity of condensate water,operating temperature,connecting mode and standards in selecting product models.
2.The load of condensate Water's safety coefficient reaches 2 to 3 times in general.
3.Please make sure the drain valve is installed properly,maintained regularly,cleaned up and operates under the normal condition,so as to extend its service life.
