一、阀体渗漏：
1、 Valve body leakage:
原因：1.阀体有砂眼或裂纹;2.阀体补焊时拉裂
Reason: 1 There are sand holes or cracks in the valve body; 2. The valve body is cracked during repair welding
处理：1.对怀疑裂纹处磨光，用硝酸溶液浸蚀，如有裂纹就可显示出来;2.对裂纹处进行挖补处理。
Treatment: 1 Polish the suspected crack and etch it with nitric acid solution. If there is a crack, it can be displayed; 2. Repair the crack.
二、阀杆及与其配合的丝母螺纹损坏或阀杆头折断、阀杆弯曲:
2、 The valve rod and its matching screw thread are damaged or the valve rod head is broken, and the valve rod is bent:
原因：1.操作不当，开关用力过大，限位装置失灵，过力矩保护未动作。;2.螺纹配合过松或过紧;3.操作次数过多、使用年限过久
Reason: 1 Improper operation, excessive switch force, failure of limit device and failure of over torque protection.; 2. The thread fit is too loose or tight; 3. Too many operations and too long service life
处理：1.改进操作，不可用力过大;检查限位装置，检查过力矩保护装置;2.选择材料合适，装配公差符合要求;3.更换备品
Treatment: 1 Improve the operation and do not use too much force; Check the limit device and over torque protection device; 2. Select appropriate materials and the assembly tolerance meets the requirements; 3. Replace spare parts
三、阀盖结合面漏
3、 Valve cover joint surface leakage
原因：1.螺栓紧力不够或紧偏;2.垫片不符合要求或垫片损坏;3.结合面有缺陷
Reason: 1 Insufficient tightening force or eccentric tightening of bolts; 2. The gasket does not meet the requirements or the gasket is damaged; 3. The joint surface is defective
处理：1.重紧螺栓或使门盖法兰间隙一致;2.更换垫片;3.解体修研门盖密封面
Treatment: 1 Re tighten the bolts or make the gap between the door cover flanges consistent; 2. Replace the gasket; 3. Disassemble and repair the sealing surface of the door cover
四、阀门内漏：
4、 Valve internal leakage:
原因：1.关闭不严;2.结合面损伤;3.阀芯与阀杆间隙过大，造成阀芯下垂或接触不好;4.密封材料不良或阀芯卡涩。
Reason: 1 Lax closure; 2. Joint surface damage; 3. The clearance between the valve core and the valve stem is too large, causing the valve core to sag or poor contact; 4. The sealing material is poor or the valve core is jammed.
处理：1.改进操作，重新开启或关闭;2.阀门解体，阀芯、阀座密封面重新研磨;3.调整阀芯与阀杆间隙或更换阀瓣;4.阀门解体，卡涩;5.重新更换或堆焊密封圈
Treatment: 1 Improve operation and reopen or close; 2. Disassemble the valve and regrind the sealing surface of valve core and valve seat; 3. Adjust the clearance between the valve core and the valve stem or replace the valve disc; 4. Disassemble the valve and solve the jam; 5. Replace or weld the sealing ring again
五、阀芯与阀杆脱离，造成开关失灵:
5、 The valve core is separated from the valve stem, resulting in switch failure:
原因：1.修理不当;2.阀芯与阀杆结合处被腐蚀;3.开关用力过大，造成阀芯与阀杆结合处被损坏;4.阀芯止退垫片松脱、连接部位磨损
Reason: 1 Improper repair; 2. The joint of valve core and valve rod is corroded; 3. Excessive switching force causes damage to the joint between valve core and valve rod; 4. The valve core stop gasket is loose and the connecting parts are worn
处理：1.检修时注意检查;2.更换耐腐蚀材质的门杆;3.操作是不可暴力开关，或不可全开后继续开启阀门;4.检查更换损坏备品
Treatment: 1 Pay attention to inspection during maintenance; 2. Replace the door rod made of corrosion-resistant material; 3. Do not switch violently or continue to open the valve after fully opening; 4. Check and replace damaged spare parts
六、阀芯、阀座有裂纹：
6、 Cracks on valve core and valve seat:
原因：1.结合面堆焊质量差;2.阀门两侧温差大
Reason: 1 Poor surfacing quality of joint surface; 2. Large temperature difference on both sides of the valve
处理：对有裂纹处进行补焊，按规定进行热处理，车光、并研磨。
Treatment: repair welding shall be carried out for cracks, heat treatment shall be carried out according to regulations, polishing and grinding shall be carried out.
七、阀杆升降不灵或开关不动:
7、 The valve rod does not lift properly or the switch does not move:
原因：1.冷态时关得太紧受热后胀死或全开后太紧;2.填料压得过紧;3.阀杆间隙太小而胀死;4.阀杆与丝母配合过紧，或配合丝扣损坏;5.填料压盖压偏;6.门杆弯曲;7.介质温度过高，润滑不良，阀杆严重锈蚀
Reason: 1 It is closed too tightly in cold state and swells to death after being heated, or it is too tight after being fully opened; 2. The packing is pressed too tightly; 3. The valve stem clearance is too small and expands to death; 4. The fit between the valve rod and the screw nut is too tight, or the matching screw thread is damaged; 5. Packing gland pressure deviation; 6. The door rod is bent; 7. The medium temperature is too high, the lubrication is poor, and the valve rod is seriously rusted
处理：1.对阀体加热后用力缓慢试开或开足并紧时再稍关;2.稍松填料压盖后试开;3.适当加大阀杆间隙;4.更换阀杆与丝母;5.重新调整填料压盖螺栓;6.校直门杆或进行更换;7.门杆采用纯净石墨粉做润滑剂
Treatment: 1 After heating the valve body, try to open it slowly or close it slightly when it is fully opened and tightened; 2. Slightly loosen the packing gland and try to open it; 3. Properly increase the valve stem clearance; 4. Replace the valve rod and screw nut; 5. Readjust the packing gland bolts; 6. Straighten the door rod or replace it; 7. Pure graphite powder is used as lubricant for door rod
八、填料泄漏:
8、 Packing leakage:
原因：1.填料材质不对;2.填料压盖未压紧或压偏;3.加装填料的方法不对;4.阀杆表面损伤
Reason: 1 Wrong filler material; 2. The packing gland is not compressed or biased; 3. The method of adding filler is wrong; 4. Valve stem surface damage
处理：1.正确选择填料;2.检查并调整填料压盖，防止压偏;3.按正确的方法加装填料;4.修理或更换阀杆
Treatment: 1 Correct selection of filler; 2. Check and adjust the packing gland to prevent pressure deviation; 3. Add filler according to the correct method; 4. Repair or replace the valve stem
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