利用高精度研磨不銹鋼空心浮球在閥腔內(nèi)隨著凝結(jié)水的液位變化開啟或關(guān)閉閥門。該疏水閥的結(jié)構(gòu)比較簡單，主要由浮球和自動排空裝置組成。閥腔內(nèi)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(nèi)無易損件，可靠性高。浮球能根據(jù)水位變化而自由調(diào)節(jié)閥孔的開度，能夠連續(xù)排放凝結(jié)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(nèi)）液囊熱敏元件組成和（過熱蒸汽系統(tǒng)）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(yōu)點：
1、轉(zhuǎn)動的是高精度研磨的不銹鋼浮球，抗腐蝕。
2、結(jié)構(gòu)簡單，維修方便。
3、不受壓力波動的影響，連續(xù)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(tǒng)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
| 零部件名稱Part and component name | 材質(zhì)Material |
| 閥體、閥蓋Valve body、valve cover | 鑄鐵、鑄鋼、不銹鋼Cast iron、Cast steel、Stainless steel |
| 自由浮球Free float ball | 304/316不銹鋼304/316 Stainless steel |
| 閥座Valve seat | 高鉻不銹鋼High chrome stainless steel |
| 自動排空氣裝置Automatic air exhaust | 不銹鋼、熱敏元件Stainless steel、Thermo-sensitive element |
| 過濾網(wǎng)、罩Filtrating screen、Cover | 不銹鋼Stainless steel |
不銹鋼球直徑/Diameter of stainless bal
| 材質(zhì)/Material | A,JH3N | B,JH5N | D,JH7N | E,JH9N | F,JH11N | G,JH13N |
| 鑄鐵 Cast iron | 50 | 68 | 110 | 150 | 180 | 200 |
| 鑄鋼 Cast steel | 50 | 70 | 120 | 150 | 190 | 220 |
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(jié)水順利進入閥腔，閥腔內(nèi)的凝結(jié)水的液位隨即上升，使浮球升高，開啟閥孔，將凝結(jié)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(jié)水進入閥腔時，自動排空裝置開始膨脹，關(guān)閉自動排空氣裝置，疏水閥開始正常工作。這時閥腔內(nèi)的浮球隨凝結(jié)水液位的高低而升降，能連續(xù)的排放凝結(jié)水。由于自由浮球式疏水閥的閥座孔總處于凝結(jié)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(nèi)不受溫度和工作壓力波動的影響，能連續(xù)工作，其最小過冷度約為0℃，由于該閥能自動、連續(xù)地排除凝結(jié)水，加熱設備內(nèi)不會有水積聚，能使加熱設備達到理想換熱效率。是生產(chǎn)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(shù)參數(shù)/Technique parameter
| 殼體壓力等級 Shell Pressure grade | 負荷泄漏率 Load Leakage rate | 使用介質(zhì) Used medium | 殼體材質(zhì) Shell material | 允許背壓率 Permitted backpressure rate | 工作壓差 Maximum operating pressure differential |
| 1.6、 2.5、 4.0、 6.4MPA | ≈0% | 蒸汽、凝結(jié)水 Steam、 Condensate water | 碳鋼/304/316 Carbon steel | ≥80% | 4.0MPA |
| 節(jié)能效果 Energy saving effect | 最小過冷度 Minimum subcooled temperature | 排水方式 Drainage method | 允許溫度 Maximum allowable temperature | 排空氣裝置 Air exhaust system | 壓力變化范圍 Pressure change range |
| 優(yōu)秀 Excellence | 0℃ | 連續(xù)方式 Continue mode | 420℃ | 自動 Automatic | 適應 Adaption |
外型尺寸和重量/Prime out-form dimensions and weigh
產(chǎn)品型號 Product model 口徑(DN) Calibre L法蘭 Flange L螺紋/焊接 Thread/ welding H1 H2 W 重量 Weight 使用壓力范圍(Mpa) Pressure change range 公稱壓力(Mpa) Nominal pressure JH3N 15~20 25 - 195 215 55 90 95 3.61 0.1-2.5 2.5-4.0 JH3NF 15~20 25 195 215 - 55 90 95 5.5 0.1-2.5 2.5-4.0
排水量/Capacity
注解：
1、選型時請?zhí)峁┕ぷ鲏毫Α⒐ぷ鲏翰?、凝結(jié)水發(fā)生量、工作溫度、連接方式及標準。
2、凝結(jié)水負荷的安全系數(shù)一般為2～3倍。
3、正確安裝、定期保養(yǎng)清除閥內(nèi)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(jié)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.
