止回阀是平时比较常见的阀门之一，结构简单，组装和拆卸都不复杂，可以自己动手。止回阀在拆开之前，应保证管道和阀门内部无压力，或将介质置换成惰性气体，一是为了安，二是为了便于拆卸。想要更好的拆卸先可以了解怎么安装，了解其结构，这样在动手的时候心里比较有底。
The check valve is one of the most common valves. It has a simple structure and is easy to assemble and disassemble. You can do it yourself. Before disassembling the check valve, ensure that there is no pressure inside the pipe and valve, or replace the medium with inert gas for safety and disassembly. If you want a better disassembly, you can first understand how to install and understand its structure, so that you can have a good idea when you start.
1.先将主阀前后端的阀门关闭上。
1. First close the front and rear valves of the main valve.
2.将主阀盖上的配管接头螺丝松开，一定要释放完阀中的压力。
2. Loosen the screw of the pipe fitting on the main valve cover to release the pressure in the valve.
3.将所有螺丝取下，包括控制管路中的必要铜管的螺帽。
3. Remove all screws, including the nuts of necessary copper pipes in the control pipeline.
4.取阀盖和弹簧。
4. Take off the valve cover and spring.

5.将轴芯、膜片、活塞等取下，切勿损伤膜片。
5. Remove the shaft core, diaphragm, piston, etc. without damaging the diaphragm.
6.将以上各项东西取出后，检查膜片及○型圈是否损坏;如无损坏请勿再分自行争其内部零件。
6. After taking out the above items, check whether the diaphragm and O-ring are damaged; If there is no damage, please do not compete for the internal parts.
7.如发现膜片或○型圈有损坏，请将轴芯上的螺帽松脱，逐浙分解出膜片或型圈，取出后重新换上新的膜片或○型圈。
7. If the diaphragm or O-ring is damaged, loosen the nut on the shaft core, disassemble the diaphragm or O-ring one by one, and replace it with a new one after taking it out.
8.详细检视主阀内部阀座、轴芯等是否有损坏，其中要是有杂物一定要清理的干干净净。
8. Check whether the valve seat, shaft core, etc. inside the main valve are damaged in detail. If there are sundries, they must be cleaned up.
9.依反向是顺序将更换后的零部件组合装好主阀，注意电站阀门不能有卡阻现象。
9. Assemble the replaced parts and components into the main valve in reverse order, and note that the power station valve shall not be jammed.
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