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原文
Valve leakage of 6 kinds of solutions 1) increase the sealing oil law Not use sealing grease on the valve, consider increasing the stem seal seal oil to improve performance. 2) increase the packing method To improve the packing of the valve stem sealing performance, can be used to increase the packing method. Usually with double, multi-mix filling in the form, simply increasing the number, such as 3 to 5 increase, the effect is not obvious. 3) the replacement of graphite packing method Extensive use of PTFE packing, because of its working temperature range of -20 ~ +200 ℃, when the temperature in the upper and lower limits, change is large, the seal will be decreased, aging fast, short life. Flexible graphite packing can overcome these shortcomings and long service life. Thus some plants to fill all of the PTFE graphite packing, and even buy back the new valve will be replaced by one of the PTFE packing graphite packing before use. However, graphite packing large hysteresis, creep initially produce some of the phenomenon, which must be considered. 4) change the flow in the stem end method set P2 When a larger △ P, P1 and large, sealed sealed P2 than P1 is clearly difficult. Therefore, the flow can be taken to change the method of the P1 to P2 in the stem end of the stem end, which is high pressure, differential pressure valve is large more effective. Such as bellows valves should be considered on the normally sealed P2. 5) sealing method using lens pad For the upper and lower lid seal, valve seat and the upper and lower valve sealing. If the flat sealing, high temperature and pressure, the sealing is poor, causing leaks, you can use the lens pad seal, to get satisfactory results. 6) Replace gasket So far, the majority still use asbestos gasket in high temperature sealing performance is poor, life expectancy is short, causing leakage. In such cases, you can use spiral wound gaskets, "O"-ring, and now many plants have been used.
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译文：
1）增加密封油脂法对未使用密封油脂的阀，可考虑增加密封油脂来提高阀杆密封性能。 2）增加填料法为提高填料对阀杆的密封性能，可采用增加填料的方法。通常是采用双层、多层混合填料形式，单纯增加数量，如将3片增到5片，效果并不明显。 3）更换石墨填料法大量使用的四氟填料，因其工作温度在－20～+200℃范围内，当温度在上、下限，变化较大时，其密封性便明显下降，老化快，寿命短。柔性石墨填料可克服这些缺点且使用寿命长。因而有的工厂全部将四氟填料改为石墨填料，甚至新购回的调节阀也将其中的四氟填料换成石墨填料后使用。但使用石墨填料的回差大，初时有的还产生爬行现象，对此必须有所考虑。 4）改变流向，置P2在阀杆端法当△P较大，P1又较大时，密封P1显然比密封P2困难。因此，可采取改变流向的方法，将P1在阀杆端改为P2在阀杆端，这对压力高、压差大的阀是较有效的。如波纹管阀就通常应考虑密封P2。 5）采用透镜垫密封法对于上、下盖的密封，阀座与上、下阀体的密封。若为平面密封，在高温高压下，密封性差，引起外泄，可以改用透镜垫密封，能得到满意的效果。 6）更换密封垫片至今，大部分密封垫片仍采用石棉板，在高温下，密封性能较差，寿命也短，引起外泄。遇到这种情况，可改用缠绕垫片，“O”形环等，现在许多厂已采用。

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