不銹鋼防爆帶手輪電動球閥、調節型低溫電動球閥以防水級別 IP67,NEMA4 and 6、防爆等級：（Exd Ⅱ BT4,Exd Ⅱ CT6）角程式帶手動執行器為主。調節型低溫電動球閥以220V交流電源為驅動電源，以4-20mA電流信號或0-10V DC 電壓信號為控制信號，實現其自動化控制。永龍電動閥門不斷改革與創新,設計制造出更新更多更好的產品，以求實的精神，優質的產品，完善的售后服務，全力打造以國產代進口的目標前進。
不銹鋼防爆帶手輪防爆電動球閥、性能對比：
殼體為硬質鋁合金，經陽極氧化處理和聚酯粉末涂層，耐腐蝕性強，防護等級為IP67，NEMA4和6，并有IP68和防爆型供選擇。
The shell is made of horniness aluminium alloy, pass through anodic oxidation treatment and polyester powder coating, so it has strong corrosion resistance. Protection grade is IP67, NEMA 4 AND 6, and optional IP68 type and explosion-proof model.
全封閉式鼠籠式電機，體積小，扭矩大，慣性力小，絕緣等級為F級，內置過熱保護開關，可防止損壞電機。
Fully enclosed Squirrel-cage motor, small volume, large torque, and small inertia force, F-class insulation rating, built-in thermal protection switch, avoiding damage the electric machinery.
手輪的設計保證安全可靠、省力、體積小。不通電時，扳動離合器手柄可進行手動操作。通電時，離合器自動復位。（注：在不通電的狀況下，電動執行器將保持*手動狀態。）
The design of handwheel ensure safe, reliable, labor-saving, small volume. When it don’t have electricity, it can be manually operated by clutch handle. When it has electricity, the clutch will reset automatically.
指示器安裝在中心軸上，可以觀察閥門位置。鏡面采用凸透鏡設計，不積水，觀察更方便。
Indicator installs in the center axis, so it can observes the valve position. It adopts convex mirror design, no cumulate water, more convenient to observe.
干燥器用來控制溫度，防止由于溫度和天氣變化導致執行器內部水分凝結，保持內部電氣元件的干燥。
It is used for controlling temperature, avoiding internal moisture of electric actuator condensed because of the changing of temperature and weather, keep inner electric device dry.
機械，電子雙重限位。機械限位螺釘可調，安全可靠；電子限位開關由凸輪機構來控制，簡單的調整機構能精確并方便地設定位置。
Mechanical, electronic double limit. Mechanical limit screw is adjustable, safe and reliable; electron limit switch is controlled by the cam mechanism, easy adjustment institutions can set the position accuray and conveniently.
精密的雙蝸輪蝸桿機構可高效傳輸大扭矩，效率高，噪音低（zui大50分貝），壽命長有自鎖功能，防止反轉，傳動部分穩定可靠，無需再加油。
Exact worm and worm gear can efficiently transfer large torque, high efficiency, low noise (max. 50 dB), long life, and it has self-locking function to prevent the inversion, transmission part is stable and reliable, no need to add oil.
拆除外殼時，螺栓附在殼體上，不會脫落。
When removed the shell, the bolt would be attached to the shell and didn’t fall off. 
電(dian)動(dong)閥門★電(dian)動(dong)球閥★電(dian)動(dong)調節閥★低溫球閥★電(dian)動(dong)調節球閥“優良的品質，來(lai)自我(wo)們(men)專業生產。"-上海永龍閥門廠
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