進口浮球式疏水閥美國LEO疏水閥工作原理說明
美國LEO力沃閥門產品包括，高溫高壓閥門，球閥，電磁閥，針型閥，蝶閥，閘閥，截止閥，止回閥，過濾器，蒸汽疏水閥等，根據使用場合不同需求可選不同材質，例如鑄鋼（碳鋼），不銹鋼，鍛鋼，球墨鑄鐵，鑄鐵。
〖美國力沃LEO自由浮球式疏水閥〗
FREE-BALL FLOAT TRAP
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
零部件名稱Part and component name 材質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、罩Filtrating screen、Cover 不銹鋼Stainless steel
不銹鋼球直徑/Diameter of stainless ball
材質/Material B,JH5N D,JH7N E,JH9N F,JH11N G,JH13N
鑄鐵 Cast iron 68 110 150 180 200
鑄鋼 Cast steel 70 120 150 190 220
【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zui小工作壓力為0.01Mpa，從0.01Mpa至zui高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zui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*換熱效率。是生產工藝加熱設備的疏水閥之一。
Description of work principle
Both low-temperature condensed water and air will run into the valve cavity when the equipment is just started, consequently, automatic air discharge equipment will be open and discharge the air, enabling low-temperature condensed water coming into the valve cavity smoothly, at the moment, the level of low-temperature condensed water inside will rise swiftly, which bring about elevation of ball floating and open of valve hole, for the purpose of discharging the condensed water; the steam earlier will enter into heating equipment soon, which have equipment heating and promoting temperature in a fast manner, the automatic air discharge equipment will start inflating as the steam or rather high-temperature condensed water enter into valve cavity, otherwise, trap should operate normally as soon as the automatic air discharge equipment is closed. At the moment, the ball floating inside valve cavity will up and down along with the level of the condensed water, and with capability of continuously discharging condensed water. Due to the fact that the valve seat hole of free-ball float trap is always below the level of condensed water, ultimay formed water seal that separated water and steam in a natural way, therefore, there should be in no circumstance of leakage of steam during operation of the equipment. The valve will bear the minimum work pressure of 0.01 Mpa, in addition, it will keep operating continuously without influence of temperature and fluctuation of work pressure within the scope between 0.01Mpa and maximum work pressure. In consideration of the minimum super cooling degree of the valve is about 0℃, coupled with the fact that the valve is capable of discharging condensed water automatically and continuously, therefore, heating equipment will remain absence of accumulated water, which could have heating equipment reach optimum efficiency in heat exchange. All in all, the valve is one of the best traps for heating equipment applicable to production.
美國力沃集團中國廣州銷售總部
美國力沃集團高度重視中國市場的開發，根據力沃總裁Williams提出的“高品質的閥門，全方面的，完善的服務”的發展理念，美國LEO力沃閥門已經廣泛應用在中國的蒸汽系統、石化系統、電力系統、食品系統，配套設備、冶金系統、水系統等領域。
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