一、閥體滲漏：
1、 Valve body leakage:
原因：1.閥體有砂眼或裂紋;2.閥體補焊時拉裂
Reason: 1 There are sand holes or cracks in the valve body; 2. The valve body is cracked during repair welding
處理：1.對懷疑裂紋處磨光，用硝酸溶液浸蝕，如有裂紋就可顯示出來;2.對裂紋處進行挖補處理。
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、閥桿及與其配合的絲母螺紋損壞或閥桿頭折斷、閥桿彎曲:
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.操作不當，開關用力過大，限位裝置失靈，過力矩保護未動作。;2.螺紋配合過松或過緊;3.操作次數過多、使用年限過久
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
處理：1.改進操作，不可用力過大;檢查限位裝置，檢查過力矩保護裝置;2.選擇材料合適，裝配公差符合要求;3.更換備品
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、閥蓋結合面漏
3、 Valve cover joint surface leakage
原因：1.螺栓緊力不夠或緊偏;2.墊片不符合要求或墊片損壞;3.結合面有缺陷
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
處理：1.重緊螺栓或使門蓋法蘭間隙一致;2.更換墊片;3.解體修研門蓋密封面
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、閥門內漏：
4、 Valve internal leakage:
原因：1.關閉不嚴;2.結合面損傷;3.閥芯與閥桿間隙過大，造成閥芯下垂或接觸不好;4.密封材料不良或閥芯卡澀。
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.
處理：1.改進操作，重新開啟或關閉;2.閥門解體，閥芯、閥座密封面重新研磨;3.調整閥芯與閥桿間隙或更換閥瓣;4.閥門解體，卡澀;5.重新更換或堆焊密封圈
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、閥芯與閥桿脫離，造成開關失靈:
5、 The valve core is separated from the valve stem, resulting in switch failure:
原因：1.修理不當;2.閥芯與閥桿結合處被腐蝕;3.開關用力過大，造成閥芯與閥桿結合處被損壞;4.閥芯止退墊片松脫、連接部位磨損
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
處理：1.檢修時注意檢查;2.更換耐腐蝕材質的門桿;3.操作是不可暴力開關，或不可全開后繼續開啟閥門;4.檢查更換損壞備品
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、閥芯、閥座有裂紋：
6、 Cracks on valve core and valve seat:
原因：1.結合面堆焊質量差;2.閥門兩側溫差大
Reason: 1 Poor surfacing quality of joint surface; 2. Large temperature difference on both sides of the valve
處理：對有裂紋處進行補焊，按規定進行熱處理，車光、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、閥桿升降不靈或開關不動:
7、 The valve rod does not lift properly or the switch does not move:
原因：1.冷態時關得太緊受熱后脹死或全開后太緊;2.填料壓得過緊;3.閥桿間隙太小而脹死;4.閥桿與絲母配合過緊，或配合絲扣損壞;5.填料壓蓋壓偏;6.門桿彎曲;7.介質溫度過高，潤滑不良，閥桿嚴重銹蝕
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
處理：1.對閥體加熱后用力緩慢試開或開足并緊時再稍關;2.稍松填料壓蓋后試開;3.適當加大閥桿間隙;4.更換閥桿與絲母;5.重新調整填料壓蓋螺栓;6.校直門桿或進行更換;7.門桿采用純凈石墨粉做潤滑劑
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.填料材質不對;2.填料壓蓋未壓緊或壓偏;3.加裝填料的方法不對;4.閥桿表面損傷
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
處理：1.正確選擇填料;2.檢查并調整填料壓蓋，防止壓偏;3.按正確的方法加裝填料;4.修理或更換閥桿
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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