利用高精度研磨不锈钢空心浮球在阀腔内随着凝结水的液位变化开启或关闭阀门。该疏水阀的结构比较简单，主要由浮球和自动排空装置组成。阀腔内的动作元件——不锈钢空心浮球，采用高精度研磨工艺制造，整个球面均可做密封面，工作时无集中磨损，使用寿命长 ; 阀腔内无易损件，可靠性高。浮球能根据水位变化而自由调节阀孔的开度，能够连续排放凝结水，过冷度≈0℃，工作效率高。

自动排空装置分为两种 :（低压PN25以内）液囊热敏元件组成和（过热蒸汽系统）双金属片组成。

Free-ball float trap

The drain valve is opened or closed by taking advantage of the change of liquid level of condensate water with the high-precision grinding stainless steel hollow float ball in the valve cavity. This steam trap has a simple structure, mainly consisting of float balls and automatic emptying devices. The sole action elements, namely, the stainless steel hollow float ball is manufactured by high-precision grinding process, and its entire sphere can serve as the sealing face and will not be worn intensively during the work, so it has a longer service life. In addition, there is no wearing part in the valve cavity, with a high reliability. The float ball can freely adjust the openness of the valve opening in response to the change of water level and discharge the condensate water continuously with a subcooled temperature of about 0℃ and higher efficiency.
The automatic emptying devices fall into two types : (within low pressure PN25) consisting of reservoir thermo-sensitive elements and (overheated steam system) consisting of bimetals.

优点：

1、转动的是高精度研磨的不锈钢浮球，抗腐蚀。
2、结构简单，维修方便。
3、不受压力波动的影响，连续排水，噪声小。
4、装有自动排空装置，能够迅速排除空气，防止气堵和汽锁。
5、体积小，排量大。
6、有水就排，能够加快系统启动速度。

Merits

1. The sole moving component is the high-precision grinding stainless float ball, which can resist erosion.
2. Its simple structure is convenient for maintenance.
3. To drain continuously with low noise, without being affected by the fluctuation of the pressure.
4. To be equipped with automatic emptying devices and it can eliminate air quickly and prevent air blocking and steam locking.
5. Small volume and large displacement.
6. To drain whenever there is water left over so as to quicken the startup speed of the system.

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	铸铁、铸钢、不锈钢Cast iron、Cast steel、Stainless steel
自由浮球Free float ball	304/316不锈钢304/316 Stainless steel
阀座Valve seat	高铬不锈钢High chrome 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、罩Filtrating screen、Cover	不锈钢Stainless steel

不锈钢球直径/Diameter of stainless bal

材质/Material	A,JH3N	B,JH5N	D,JH7N	E,JH9N	F,JH11N	G,JH13N
铸铁 Cast iron	50	68	110	150	180	200
铸钢 Cast steel	50	70	120	150	190	220

工作原理说明：

在设备刚启动时，低温冷凝水和空气同时进入阀腔，这时开启自动排空装置将空气排除，使低温凝结水顺利进入阀腔，阀腔内的凝结水的液位随即上升，使浮球升高，开启阀孔，将凝结水迅速排出 ; 前面的蒸汽很快进入加热设备，使设备迅速加热升温，当蒸汽或较高温度的凝结水进入阀腔时，自动排空装置开始膨胀，关闭自动排空气装置，疏水阀开始正常工作。这时阀腔内的浮球随凝结水液位的高低而升降，能连续的排放凝结水。由于自由浮球式疏水阀的阀座孔总处于凝结水液位以下，形成水封，水汽自然分离，工作时达到无蒸汽泄漏。该阀的最小工作压力为0.01Mpa，从0.01Mpa至工作压力范围内不受温度和工作压力波动的影响，能连续工作，其最小过冷度约为0℃，由于该阀能自动、连续地排除凝结水，加热设备内不会有水积聚，能使加热设备达到理想换热效率。是生产工艺加热设备的理想疏水阀之一。

Description of work principle

When the equipment is just started, the low-temperature condensate and air enter the valve cavity at the same time. At this time, open the automatic evacuation device to remove the air, so that the low-temperature condensate can enter the valve cavity smoothly. The liquid level of the condensate in the valve cavity will rise immediately, so that the floating ball will rise. Open the valve hole, so that the condensate can be discharged quickly. The steam in front of the equipment will enter the heating equipment quickly, so that the equipment can be heated quickly and heated up. When the steam or the temperature is lower than When the high temperature condensed water enters the valve chamber, the automatic emptying device starts to expand, the automatic air exhausting device is closed, and the drain valve starts to work normally. At this time, the floating ball in the valve chamber will rise and fall with the level of condensate, which can discharge condensate continuously. Because the valve seat hole of the free floating ball type drain valve is always below the condensate level, forming a water seal, the water vapor is naturally separated, and there is no steam leakage during operation. The minimum working pressure of the valve is 0.01Mpa, from 0.01Mpa to the maximum working pressure range, it is not affected by the fluctuation of temperature and working pressure, and can work continuously. Its minimum supercooling degree is about 0 ℃. Because the valve can automatically and continuously remove the condensate, there is no water accumulation in the heating equipment, which can make the heating equipment achieve the ideal heat exchange efficiency. It is one of the ideal drain valves for heating equipment of production process.

自由浮球式疏水阀 FREE-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  rate	使用介质 Used  medium	壳体材质 Shell material	允许背压率 Permitted Backpressure  rate	工作 压差 Maximum operating Pressure  differential
1.6、 2.5、 4.0、 6.4MPA	≈0%	蒸汽、凝结水 Steam、 Condensate water	碳钢/ 304/ 316 Carbon  steel	≥80%	4.0MPA

节能效果 Energy  Saving  effect	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
优秀 Excellence	0℃	连续方式 Continue mode	420℃	自动 Automatic	适应 Adaption

外型尺寸和重量/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 Weight	使用压力 范围 (Mpa) Pressure change range	公称压力 (Mpa) Nominal pressure
J7N	32~40 50	-	230	78	206	210	17 18	0.1-1.2	1.6
J7NF	32~40 50	280 320	-	78	206	210	21 23	0.1-1.2	1.6
JH7NF	15~25 32~40 50	280 280 290	-	80 80 80	197 197 197	192 192 192	20 24 25	0.1-2.5	2.5-4.0
JH7N40F	15~50	320	-	78	165	236	40	0.1-4.0	6.4
JH7N	15~40 50	-	280 290	80	197	192	23	0.1-2.5	2.5-4.0
JH7N40	15~50	-	320	78	165	236	36	0.1-4.0	6.4

排水量/Capacity

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。
4、装有自动排气阀的疏水阀，其凝结水量能够额外增加300Kg/h。

Note
1. Please provide operating pressure and operating pressure difference, generating quantity of condensation water, operating temperature, connecting mode and standards in selecting product models.
2.The load of condensation 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.
4.The steam trap, if equipped with automatic exhaust valve, can have the quantity of condensate water increased by 300Kg/h.