1、 Valve body leakage:

原因：1.閥體有砂眼或裂紋;2.閥體補(bǔ)焊時(shí)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(duì)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(duì)裂紋處進(jìn)行挖補(bǔ)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(dāng)，開關(guān)用力過大，限位裝置失靈，過力矩保護(hù)未動(dòng)作。;2.螺紋配合過松或過緊;3.操作次數(shù)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(jìn)操作，不可用力過大;檢查限位裝置，檢查過力矩保護(hù)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(jié)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(jié)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(nèi)漏：

4、 Valve internal leakage:

原因：1.關(guān)閉不嚴(yán);2.結(jié)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(jìn)操作，重新開啟或關(guān)閉;2.閥門解體，閥芯、閥座密封面重新研磨;3.調(diào)整閥芯與閥桿間隙或更換閥瓣;4.閥門解體，解決卡澀;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(guān)失靈:

5、 The valve core is separated from the valve stem, resulting in switch failure:

原因：1.修理不當(dāng);2.閥芯與閥桿結(jié)合處被腐蝕;3.開關(guān)用力過大，造成閥芯與閥桿結(jié)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(shí)注意檢查;2.更換耐腐蝕材質(zhì)的門桿;3.操作是不可暴力開關(guān)，或不可全開后繼續(xù)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(jié)合面堆焊質(zhì)量差;2.閥門兩側(cè)溫差大

Reason: 1 Poor surfacing quality of joint surface; 2. Large temperature difference on both sides of the valve

處理：對(duì)有裂紋處進(jìn)行補(bǔ)焊，按規(guī)定進(jìn)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(guān)不動(dòng):

7、 The valve rod does not lift properly or the switch does not move:

原因：1.冷態(tài)時(shí)關(guān)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(zhì)溫度過高，潤(rùn)滑不良，閥桿嚴(yán)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(duì)閥體加熱后用力緩慢試開或開足并緊時(shí)再稍關(guān);2.稍松填料壓蓋后試開;3.適當(dāng)加大閥桿間隙;4.更換閥桿與絲母;5.重新調(diào)整填料壓蓋螺栓;6.校直門桿或進(jìn)行更換;7.門桿采用純凈石墨粉做潤(rùn)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(zhì)不對(duì);2.填料壓蓋未壓緊或壓偏;3.加裝填料的方法不對(duì);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(diào)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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