利用高精度研磨不銹鋼空心浮球在閥腔內隨著凝結水的液位變化開啟或關閉閥門。該疏水閥的結構比較簡單，主要由浮球和自動排空裝置組成。閥腔內的動作元件——不銹鋼空心浮球，采用高精度研磨工藝制造，整個球面均可做密封面，工作時無集中磨損，使用壽命長 ; 閥腔內無易損件，可靠性高。浮球能根據水位變化而自由調節閥孔的開度，能夠連續排放凝結水，過冷度≈0℃，工作效率高。
自動排空裝置分為兩種 :（低壓PN25以內）液囊熱敏元件組成和（過熱蒸汽系統）雙金屬片組成。
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.
優點：
1、轉動的是高精度研磨的不銹鋼浮球，抗腐蝕。
2、結構簡單，維修方便。
3、不受壓力波動的影響，連續排水，噪聲小。
4、裝有自動排空裝置，能夠迅速排除空氣，防止氣堵和汽鎖。
5、體積小，排量大。
6、有水就排，能夠加快系統啟動速度。
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

不銹鋼球直徑/Diameter of stainless bal

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.工作原理說明：
在設備剛啟動時，低溫冷凝水和空氣同時進入閥腔，這時開啟自動排空裝置將空氣排除，使低溫凝結水順利進入閥腔，閥腔內的凝結水的液位隨即上升，使浮球升高，開啟閥孔，將凝結水迅速排出 ; 前面的蒸汽很快進入加熱設備，使設備迅速加熱升溫，當蒸汽或較高溫度的凝結水進入閥腔時，自動排空裝置開始膨脹，關閉自動排空氣裝置，疏水閥開始正常工作。這時閥腔內的浮球隨凝結水液位的高低而升降，能連續的排放凝結水。由于自由浮球式疏水閥的閥座孔總處于凝結水液位以下，形成水封，水汽自然分離，工作時達到無蒸汽泄漏。該閥的最小工作壓力為0.01Mpa，從0.01Mpa至工作壓力范圍內不受溫度和工作壓力波動的影響，能連續工作，其最小過冷度約為0℃，由于該閥能自動、連續地排除凝結水，加熱設備內不會有水積聚，能使加熱設備達到理想換熱效率。是生產工藝加熱設備的理想疏水閥之一。
Description of work principle

自由浮球式疏水閥 FREE-BALL FLOAT TRAP

技術參數/Technique parameter

外型尺寸和重量/Prime out-form dimensions and weigh

排水量/Capacity

注解：

1、選型時請提供工作壓力、工作壓差、凝結水發生量、工作溫度、連接方式及標準。
2、凝結水負荷的安全系數一般為2～3倍。
3、正確安裝、定期保養清除閥內污物，保證疏水閥正常工作和延長使用壽命。
4、裝有自動排氣閥的疏水閥，其凝結水量能夠額外增加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.