阀门关不严怎么办？

What to do if the valve is not tightly closed?

　　一般情况下，如果是关不严的话，先确认一下阀门是否有关闭到位，如果已经关闭到位后，还是存在泄露不能密封，那就再检查密封面的情况。有些阀门的密封副是可拆卸的，那就拿出来进行研磨，再次试验。如果还是关不严的话，那就必须返厂检修或者更换阀门，以免影响阀门正常使用及出现工况事故等问题。

In general, if it is not tightly closed, first confirm whether the valve has been closed in place. If there is still leakage that cannot be sealed even after it has been closed in place, then check the condition of the sealing surface. Some valves have detachable sealing pairs, so take them out for grinding and retest. If it is still not tightly closed, then it is necessary to return to the factory for maintenance or replace the valve to avoid affecting the normal use of the valve and causing problems such as working accidents.

　　如果阀门出现关不严的的情况，应该先找出问题出现在哪里，然后根据相应的方法去处理。

If the valve fails to close tightly, the first step is to identify the problem and then use the corresponding methods to solve it.

　　阀门关不严的原因一般有以下几种

There are generally several reasons why valves cannot be tightly closed

　　（1）有杂质卡在密封面，杂物沉积在阀门底处或垫在阀瓣与阀座之间；

(1) There are impurities stuck on the sealing surface, which deposit at the bottom of the valve or cushion between the valve disc and valve seat;

　　（2）阀杆螺纹生锈，阀门无法转动；

(2) Rust on the valve stem thread prevents the valve from rotating;

　　（3）阀门密封面被破坏，导致介质出现泄漏；

(3) The sealing surface of the valve is damaged, causing leakage of the medium;

　　（4）阀杆与阀瓣连接不好，使阀瓣与阀座偏斜不能严密接触。

(4) The poor connection between the valve stem and valve disc causes the valve disc and valve seat to deviate and cannot be tightly contacted.

　　阀门关不严的处理方法

Methods for handling valve failure to close tightly

　　一、 有杂质卡住阀门密封面

1、 There are impurities blocking the sealing surface of the valve

　　阀门有时突然关不严，可能是阀门密封面间有杂质卡住，此时不应用力强行关闭，应把阀门稍开大一些，然后再试图关闭，反复试试，一般即可排除，否则应进行再次检查。也应保持介质的质量洁净。

Sometimes the valve suddenly cannot be closed tightly, which may be due to impurities sticking between the sealing surfaces of the valve. At this time, no force should be used to close it. The valve should be slightly opened larger and then attempted to close again. Repeated attempts can generally eliminate the problem, otherwise it should be rechecked. The quality of the medium should also be kept clean.

　　二、阀杆螺纹生锈

2、 Rust on valve stem threads

　　对于通常在开启状态的阀门，偶然关闭时，由于阀杆螺纹已经生锈，也会发生关不严的情况。对于这种情况，可反复开关几次阀门，同时用小锤敲击阀体底部，即能将阀门关严，无需对阀门进行研磨修理。

For valves that are usually in the open state, when accidentally closed, the valve stem thread may have rusted and may not close tightly. For this situation, the valve can be opened and closed several times, and at the same time, the bottom of the valve body can be struck with a small hammer to tightly close the valve without the need for grinding and repair.

　　三、阀门密封面被破坏

3、 The sealing surface of the valve is damaged

　　对于试着多次开关仍然关不紧的情况，那就是密封面已损坏了，或者是腐蚀、介质中的颗粒划伤等破坏了密封面，这种 情况应报修处理。

For situations where the switch cannot be closed tightly even after multiple attempts, it means that the sealing surface has been damaged, or that corrosion, particle scratches in the medium, etc. have damaged the sealing surface. This situation should be reported for repair.

　　四、阀杆与阀瓣连接不好

4、 Poor connection between valve stem and valve disc

　　这种情况，就需要给阀杆和阀杆螺母加润滑油，以保证阀门的开关灵活。要有一套正规的维护方案，加强阀门的维护工作。

In this situation, it is necessary to add lubricating oil to the valve stem and valve stem nut to ensure the flexibility of the valve opening and closing. There should be a formal maintenance plan to strengthen the maintenance of valves.

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