进口防爆电动球阀
进口防爆电动球阀结构特点:
1、由于聚四氟乙烯等材料具有良好的自润滑性，与球体的摩擦损失小，帮球阀的使用寿命长。
2、下装式阀杆和阀杆头部凸阶防止阀杆喷出，如火灾造成阀杆封破坏，凸阶与阀体间还可形成金属接触，确保阀杆密封。
3、阀杆密封可靠，由于阀杆只作旋转运动而不做升降运动，阀杆的填料密封不易破坏，且密封能力随着介质的压力增大而增大。
4、阀座密封性能好，采用聚四氟乙烯等材料制成的密封圈，结构易于密封，而且球阀的阀封能力随着介质压力的增大而增大。
5、电动装置壳体采用国外硬质铝合金，经阳比较氧化处理和聚酯粉末涂层，耐腐蚀性强，防护等级IP67，NEMA4和6，并有IP68和防爆型供选择。
Structure features of imported explosion-proof electric ball valve:
1. Because PTFE and other materials have good self-lubricating property, the friction loss with the ball is small, and the service life of the ball valve is long.
2. The bottom mounted valve rod and the convex step at the head of the valve rod prevent the valve rod from ejecting. If the fire causes damage to the valve rod seal, metal contact can be formed between the convex step and the valve body to ensure the valve rod seal.
3. The valve rod seal is reliable. Because the valve rod only rotates without lifting, the packing seal of the valve rod is not easy to be damaged, and the sealing capacity increases with the increase of the medium pressure.
4. The sealing performance of the valve seat is good. The sealing ring made of polytetrafluoroethylene and other materials is easy to seal, and the sealing capacity of the ball valve increases with the increase of the medium pressure.
5. The shell of the electric device is made of foreign hard aluminum alloy, which is anodized and coated with polyester powder. It has strong corrosion resistance, protection grade of IP67, NEMA 4 and 6, and IP68 and explosion-proof type are available for selection.
进口防爆电动球阀工作原理:
进口防爆电动球阀通过接受防爆电动执行机构输出的4-20MA的控制信号来驱动球阀阀芯旋转90°达到对管道内介质的切断与调节。防爆O型球阀旋转90°后要做切断作用；防爆V型球阀旋转90°后是做调节作用。
Working principle of imported explosion-proof electric ball valve:
The imported explosion-proof electric ball valve receives the 4-20mA control signal from the explosion-proof electric actuator to drive the valve core of the ball valve to rotate 90 ° to cut off and adjust the medium in the pipeline. The explosion-proof O-type ball valve shall be cut off after rotating 90 °; the explosion-proof V-type ball valve shall be adjusted after rotating 90 °.
进口防爆电动球阀安装说明:
（1）取掉法兰端两边的保护盖，在阀完全打开的状态下进行冲洗清洁。
（2）安装前应按规定的信号（电动或气动）进行整机测试（防止因运输产生振动影响使用性能），合格后方可上线安装（接线按电动执行机构线路图）。
（3）准备与管道连接前，须冲洗和清除干净管道中残存的杂质（这些物质可能会损坏阀座和球）。
（4）在安装期间，请不要用阀的执行机构部分作为起重的吊装点，以避免损坏执行机构及附件。
（5）本类阀应安装在管道的水平方向或垂直方向。
（6）安装点附近的管道不可有低垂或者承受外力的现象，可以用管道支架或者支撑物来消除管线的偏离。
（7）与管道连接后，请用规定的扭矩交叉锁紧法兰连接螺栓。
Installation instructions for imported explosion-proof electric ball valve:
(1) Remove the protective covers on both sides of the flange end, and wash and clean when the valve is fully open.
(2) Before installation, the whole machine shall be tested according to the specified signal (electric or pneumatic) (to prevent the vibration caused by transportation from affecting the use performance), and it can be installed online only after it is qualified (the wiring shall be in accordance with the circuit diagram of electric actuator).
(3) Before preparing to connect with the pipe, the residual impurities in the pipe must be washed and removed (these substances may damage the valve seat and ball).
(4) During the installation, please do not use the actuator part of the valve as the lifting point to avoid damaging the actuator and accessories.
(5) This type of valve shall be installed in the horizontal or vertical direction of the pipeline.
(6) The pipeline near the installation point shall not be sagged or bear external force, and the pipeline support or support can be used to eliminate the deviation of the pipeline.
(7) After connecting with the pipeline, please cross lock the flange connecting bolts with the specified torque.
