波纹管式疏水阀的热敏元件为注满易挥发液体的波纹管，利用液体的易挥发性和波纹管伸缩性。当蒸汽管线升温时，液体挥发成气体体积膨胀并产生压力推动着波纹管伸长，蒸汽管线降温达到易挥发的液体从气体转变成液体时体积缩收，波纹管内没有推动力，波纹管缩收。
Bellows seal trap
The thermo-sensitive element of bellows seal traps is bellows filled with volatile liquid,which employs the volatility of the liquid and flexibility of the bellows.When temperature of the steam pipe goes up,the liquid volatilizes into gas,the size expands and produces pressure to impel bellows to stretch.In contrast,when temperature of the steam pipe goes down to the temperature for gas to turn into liquid,the size gets smaller and the bellows contract due to lack of impetus.
优点：
1、排水温度可以调节在70~100度之间，使用方便。
2、能够阻止高温凝结水的排放，保持蒸汽管线的热能。
3、连续排水，没有噪音。
4、蒸汽压力的小波动没有影响使用。
5、结构简单，体积小，安装方便、随意。
6、通过增加波纹管直径提高凝结水的排量。
7、具有良好的排空气性能，不怕冻。
8、零泄露，背压率达到75%。
Merits
1.Convenient use due to adjustable water discharge temperature ranging from 70 to 100 degrees.
2.Capability to prevent discharge of high-temperature condensate so as to maintain heat energy of the steam pipe.
3.Continuous water discharge without noise.
4.Free from the effect of small fluctuation of steam pressure.
5.Simple structure,small size and easy installation.
6.Improvement of discharge capacity condensate by increasing diameter of bellows.
7.Good air diameter performance with resistance to coldness.
8.Zero leakage and backpressure ratio up to 75%.
安装、使用注意事项：
    安装前管路应用蒸汽吹除污物。箭头所示方向与流向一致。
    疏水阀前热力管应有1～2米不必保温。应安装在低于用汽设备凝结水排出点的地方。
    该阀出厂前疏水温度已调节在95℃左右，如果需要改变疏水温度或排水量时，可打开防护帽，松开锁紧螺母，旋转调节螺钉，顺时针旋转阀芯前进，疏水量减少，疏水温度降低；逆时针旋转，阀芯后退，疏水量增大，疏水温度上升。调整后，就将锁紧螺母拧紧。
    要定期保养，清除过滤网前的污物，保证疏水阀正常工作。
Installation/attention for use
Before the installment of pipeline,use the steam to blow off the pollutant.The arrow shows the direction consistent with the flow direction.
Ahead of the trap,the thermal tube of 1～2 meters need no heat-preservation.Be installed at thermal position lower than the condensation water discharge point of the steam-using equipment.
Before leaving the plant,the hydrophobic temperature of trap has been adjust around 95℃.If it is needed to change the hydrophobic temperature or the displacement,open the shielding bonnet,loosen the lock nut,revolve the adjusting screw revolve the valve core clockwise,the hydrophobic volume reduces and the hydrophobic temperature drops;revolve it counterclockwise,the valve core backlashes,the hydrophobic volume increases,and the hydrophobic temperature rises.After the adjustment ended,tighten the lock nut.
It is needed to make the periodic maintenance and clear the pollutant before the filtration screen,so as to guarantee the trap work normally.

波纹管式疏水阀/BELLOWS SEAL TRAP

技术参数/Technique parameter

壳体压力等级 Shell pressure grade	最大工作压差 Maximum operating pressure differential		最高允许温度 Maximum  allowable  temperature	允许背压率 Permitted  backpressure rate
1.6、 2.5MPA	1.6MPA		350℃	75%
抗冻性 Freezing  resistance	排空气装置 Air exhaust system	使用介质 Used medium	节能效果 Energy  saving effect	负荷泄漏率 Load  leakage
优秀  Excellence	自动 Automatic	蒸汽、凝结水 Steam、 condensate water	优秀  Excellence	0%

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、不锈钢 Carbon steel、Stainless steel
液囊 Reservoir	不锈钢和易挥发液体 Stainless steel、Volatile liquid
阀座 Valve seat	高铬不锈钢、四氟 High chrome stainless steel、Four Fluorine
过滤网 Filtrating screen	不锈钢 Stainless steel

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
S711	15~20 25	-	90 95	148 170	28 26	55 55	2.0 2.2	0.1-1.6	2.5

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.