不锈钢防爆带手轮电动球阀、调节型低温电动球阀以防水级别 IP67,NEMA4 and 6、防爆等级：（Exd Ⅱ BT4,Exd Ⅱ CT6）角程式带手动执行器为主。调节型低温电动球阀以220V交流电源为驱动电源，以4-20mA电流信号或0-10V DC 电压信号为控制信号，实现其自动化控制。永龙电动阀门不断改革与创新,设计制造出更新更多更好的产品，以求实的精神，优质的产品，完善的售后服务，全力打造以国产代进口的目标前进。
不锈钢防爆带手轮防爆电动球阀、性能对比：
壳体为硬质铝合金，经阳极氧化处理和聚酯粉末涂层，耐腐蚀性强，防护等级为IP67，NEMA4和6，并有IP68和防爆型供选择。
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.
全封闭式鼠笼式电机，体积小，扭矩大，惯性力小，绝缘等级为F级，内置过热保护开关，可防止损坏电机。
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.
手轮的设计保证安全可靠、省力、体积小。不通电时，扳动离合器手柄可进行手动操作。通电时，离合器自动复位。（注：在不通电的状况下，电动执行器将保持*手动状态。）
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.
指示器安装在中心轴上，可以观察阀门位置。镜面采用凸透镜设计，不积水，观察更方便。
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.
干燥器用来控制温度，防止由于温度和天气变化导致执行器内部水分凝结，保持内部电气元件的干燥。
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.
机械，电子双重限位。机械限位螺钉可调，安全可靠；电子限位开关由凸轮机构来控制，简单的调整机构能精确并方便地设定位置。
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.
精密的双蜗轮蜗杆机构可高效传输大扭矩，效率高，噪音低（zui大50分贝），寿命长有自锁功能，防止反转，传动部分稳定可靠，无需再加油。
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.
拆除外壳时，螺栓附在壳体上，不会脱落。
When removed the shell, the bolt would be attached to the shell and didn’t fall off. 
电动阀门★电动球阀★电动调节阀★低温球阀★电动调节球阀“优良的品质，来自我们专业生产。"-上海永龙阀门厂
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