杠杆浮球式是利用浮力原理和杠杆原理，通过液位的变化使浮球上升或下降，浮球驱动着杠杆使得阀瓣离开或接触阀座达到开启排水和关闭阻汽的作用。采用自动排空气阀，能自动排除不凝结气体，非常灵敏，工作质量高，使用寿命长。连续排水，有水即排，最小过冷度为 0℃。杠杆浮球式疏水阀采用两种结构方式A：单阀座-杠杆浮球 B：双平衡阀座-杠杆浮球
单阀座：需要克服介质压力对阀座的作用，阀座的孔径不能很大，适用于小型设备、伴热管线，蒸汽主管等排水小的场合。阀座孔设计在凝结水水位以下，自然形成水封，水、汽自然分离，达到无蒸汽泄漏，即便没有凝结水采用球型密封的杠杆使得阀瓣紧贴阀座，达到无新鲜蒸汽的泄露。不受凝结水量波动和温度的影响。
双平衡阀座：该阀利用双阀孔设计，介质的压力对两个阀座作用相等，方向相反，介质压力对阀座作用相抵消，阀蕊在开阀时压力相对减少，从而获得超大排量。工作时浮球随阀腔内液体位的变化而上下浮动，带动杠杆打开或关闭阀座。由于阀座孔在凝结水水位以下，形成水封，水、汽自然分离，达到无蒸汽泄漏。不受压力、温度、冷凝水流量波动的影响。

Lever-ball float trap

Lever ball float type trap employs the buoyancy principle and the lever principles:to make the ball float ascend or descend by the change in the liquid level and then the ball float drives the lever to make the valve disc from or touch the valve seat to realize drainage and closed block vapor. The product adopts the automatic air exhaust to automatically eliminate non-condensing air.It is very precise with high operating and long service life.It can discharge whenever there is any water,ａnd its minimum subcooled temperature is 0℃.The lever-ball float trap adopts two kinds of structure modes:A:Single valve seat-lever ball float;B:double balanced valve seat-lever ball float.

Single valve seat:it needs to overcome the operation on the valve seat by the medium pressure;the hole caliber of the valve seat cannot be too large and is applicable to such low displacement condition as mini-equipment,steam tracing pipeline and steam main pipe.The hole of the valve seat is designed beneath the water level of the condensate water to form water sealing to keep water apart from vapor,so as to prevent the leakage of the vapor.Though there is no condensate water that uses ball-type sealed lever to make the valve clack tightly adhesion to the valve seat,it can prevent the fresh vapor from leakage.Further,the product is free of the affect of the fluctuation of the condensate waters quantity and temperature.

The double balanced valve seat:this valve is designed to have two valve openings.The pressure of the medium act against the two valve seats equally in reverse direction,so the pressure on the valve seat is offset,the valve core assumes relatively low pressure when the valve is open,in this way the overlarge displacement is obtained.During the operating process,the ball float floats with the change in liquid level of the valve cavity to make the lever open or close the valve seat.The hole of the valve seat is designed beneath the water level of the condensate water to form water sealing to keep water apart from vapor,so as to prevent the leakage of the vapor.Further,the product is free of the affect caused by the fluctuation of pressure,temperature and condensates flow.

优点：

1、采用新型阀机构（新 SCCV 关闭方式和Z型结构），具有优良的密封性和耐久性。
2、双平衡阀座设计，比一般的疏水阀体积小而排量大，在特大排量场合更能发挥性。
3、单阀座设计可以水平或垂直安装，可以满足高背压，低排量蒸汽管线。
4、内装空气自动排放阀，可防止空气气堵和蒸汽汽锁。
5、全部部件安装在阀盖上，阀无需从配管上卸下，就可维修保养，简单方便。

Merits

1.To use new-style valve mechanism (new SCCV closing mode and Z-shaped structure) to boast excellent tightness and endurance.
2.To employ double balanced valve seat design,it has smaller volume and larger displacement and can exert its advantages when needing large displacement.
3.The single valve seat model can be installed horizontally and vertically,satisfying the requirements of steam pipeline with high backpressure and low displacement.
4.The built-in automatic air exhaust can prevent air blocking and steam locking;

5.As all components are installed on the valve cover,so they can be maintained and cleaned up simply and easily without being removed from pipe arrangement.

双平衡杠杆浮球式疏水阀/DOUBLE BALANCE LEVER-BALL FLOAT 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	工作压差 Maximum operating pressure differential
1.6、 2.5、 4.0、 10MPA	≈0%	蒸汽、凝结水 Steam、 Condensate water	≥90%	优秀/ 良好 Excellence/ good	10MPA
最小过冷度 Minimum Subcooled temperature		排水方式 Drainage method	允许温度 Maximum Allowable temperature	排空气装置 Air exhaust system	压力变化范围 Pressure change range
0℃		连续方式 Continue mode	420℃	自动 Automatic	适应 Adaption

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	铸钢、不锈钢 Cast steel、Stainless steel
浮球、杠杆 Float ball、Lever	304不锈钢 304 Stainless steel
双平衡阀座 Dual Balance valve seat	STL合金和不锈钢组合 Combination of STL alloy and Stainless steel
自动排空气装置 Automatic air exhaust	不锈钢、热敏元件 Stainless steel、Thermo-sensitive element
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	L1	H	H1	W	重量(kg) weight	使用压力 范围(MPa) Pressure change range	公称压力 (MPa) Nominal pressure
FT44G2-4C	80-150 200	440 500	960	370	148	296	120	0.1-2.5·40	4.0-6.4
FT44G2-4V
FT44G2-4P

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、双平衡阀座凝结水负荷的安全系数一般为1.5~2倍，单阀座凝结水负荷的安全系数为3。

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 safely coefficient for condensate water load of dual balance valve seat is generally 1.5 to 2 times,ａnd the safely coefficient for condensate water load of single valve seat is 3 times.

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.