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⒈汽缸是鑄造而成的，汽缸出廠后都要經過時效處理，使汽缸在住鑄造過程中所產生的內應力*消除。如果時效時間短，那么加工好的汽缸在以后的運行中還會變形。
⒉汽缸在運行時受力的情況很復雜，除了受汽缸內外氣體的壓力差和裝在其中的各零部件的重量等靜載荷外，還要承受蒸汽流出靜葉時對靜止部分的反作用力，以及各種連接管道冷熱狀態下對汽缸的作用力，在這些力的相互作用下，汽缸易發生塑性變形造成泄漏。
⒊汽缸的負荷增減過快，特別是快速的啟動、停機和工況變化時溫度變化大、暖缸的方式不正確、停機檢修時打開保溫層過早等，在汽缸中和法蘭上產生很大的熱應力和熱變形。
⒋汽缸在機械加工的過程中或經過補焊后產生了應力，但沒有對汽缸進行回火處理加以消除，致使汽缸存在較大的殘余應力，在運行中產生*的變形。
⒌在安裝或檢修的過程中，由于檢修工藝和檢修技術的原因，使內缸、汽缸隔板、隔板套及汽封套的膨脹間隙不合適，或是掛耳壓板的膨脹間隙不合適，運行后產生巨大的膨脹力使汽缸變形
⒍使用的汽缸密封劑質量不好、雜質過多或是型號不對；汽缸密封劑內若有堅硬的雜質顆粒就會使密封面難以緊密的結合。
⒎汽缸螺栓的緊力不足或是螺栓的材質不合格。汽缸結合面的嚴密性主要靠螺栓的緊力來實現的。機組的起停或是增減負荷時產生的熱應力和高溫會造成螺栓的應力松弛，如果應力不足，螺栓的預緊力就會逐漸減小。如果汽缸的螺栓材質不好，螺栓在長時間的運行當中，在熱應力和汽缸膨脹力的作用下被拉長，發生塑性變形或斷裂，緊力就會不足，使汽缸發生泄漏的現象。
⒏汽缸螺栓緊固的順序不正確。一般的汽缸螺栓在緊固時是從中間向兩邊同時緊固，也就是從垂弧zui大處或是受力變形zui大的地方緊固，這樣就會把變形zui大的處的間隙向汽缸前后的自由端轉移，zui后間隙漸漸消失。如果是從兩邊向中間緊，間隙就會集中于中部，汽缸結合面形成弓型間隙，引起蒸汽泄漏。

SMC氣缸型號：
CHDKGB50-10
CHDKGB50-100
CHDKGB50-15
CHDKGB50-15M
CHDKGB50-20
CHDKGB50-25
CHDKGB50-35
CHDKGB50-40
CHDKGB50-50
CHDKGB50-75
CHDKGB5050MXC62
CHDKGB63-100
CHDKGB63-25
CHDKGB63-30
CHDKGB63-35
CHDKGB63-35M
CHDKGB63-40
CHDKGB63-50
CHDKGB63-75
CHDKGB63-80M
CHDKGB80-100
CHDKGB80-100M
CHDKGB80-15M
CHDKGB80-150
CHDKGB80-25
CHDKGB80-50
CHDKGB80-75
CKZ3T50-90T
CKZT50-A015CB
CKZ3T63-105T
CKZT63-A045CS
CKZ1N50-135LT
CKZ1N50-135RT
CKZ2N50-120RT
CKZ2N50-135RT
CKZ3N50-45DT
CKZ3N50-90DP
CKZ3N63-45DP
CKZ3N63-90DT
CKZ-50A011
CKZN50-135LN
CKZN50-135RN
CKZT40-135T
CKZT40-30T
CKZT40-45T
CKZT40-60T
CKZT40-A015CS
CKZT40-A015LS
CKZT40-A015RS
CKZT40-A045CS
CKZT63-120T
CKZT63-A045CS
CKZT63-A045LS
CKZT63-A045RS
CKZT63TN-120T
CKA80-KRF0027-75Y-P5DWZ
CKA-K75
CKA-Y04
CKA-YA04
CKB40-17-102B
CKB40-18-207A
CKB40-18-207B
CKB-Y04
CKCV32-135B-RH
CKG1A40-100
CKG1A40-100Y
CKG1A40-100YA
CKG1A40-125
CKG1A40-125Y
CKG1A40-125YA
CKG1A40-50
CKG1A40-50Y
CKG1A40-50YA
CKG1A40-50YA-P
CKG1A40-50Y-P
CKG1A40-50YZ
CKG1A40-75Y
CKG1A40-75YA
CKG1A40-75YA-P
CKG1A40-75Y-P
CKG1A40-75Y-P5DWL
CKG1A40-75YZ
CKG1A50-100
CKG1A50-100Y
CKG1A50-100YA
CKG1A50-100YABD-L
CKG1A50-100YA-P
CKG1A50-100YBD-L
CKG1A50-100Y-P
CKG1A50-125-X276A
CKG1A50-125Y
CKG1A50-125YA
CKG1A50-125YABD-L
CKG1A50-125YAD
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CKG1A50-125YBD-L
CKG1A50-125YD
CKG1A50-125Y-P
CKG1A50-150
CKG1A50-150Y
CKG1A50-150YA
CKG1A50-150YABD-L
CKG1A50-150YBD-L
CKG1A50-40YA
CKG1A50-50
CKG1A50-50Y
CKG1A50-50YA
CKG1A50-50YA-X276A
CKG1A50-50YA-X276B
CKG1A50-50YABDL
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CKG1A50-50Y-P
CKG1A50-50Y-X276A
CKG1A50-50Y-X276B
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CKG1A50-75Y
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CKG1A50-75YA-P
CKG1A50-75YA-X738
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CKG1A50-75Y-P
CKG1A50-75Y-X1515
CKG1A50-75Y-X738
CKG1A50-75YZ
CKG1A63-100
CKG1A63-100-P
CKG1A63-100Y
CKG1A63-100YA
CKG1A63-100YABD-L
CKG1A63-100YA-P
CKG1A63-100YBD-L
CKG1A63-100Y-P
CKG1A63-125
CKG1A63-125B
CKG1A63-125Y
CKG1A63-125YA
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CKG1A63-150Y
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CKG1A63-KRF0028-75YBD
CKG1B40-50
CKG1B40-50Y
CKG1B40-50YA
CKG1B50-100
CKG1B50-100I
CKG1B50-100Y
CKG1B50-100YA
CKG1B50-100YA-X276A
CKG1B50-100YAL
CKG1B50-100YL
CKG1B50-100Y-X276A
CKG1B50-125Y
CKG1B50-125YA
CKG1B50-125YAL
CKG1B50-125YL
CKG1B50-150
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CKG1B50-75YA-X276A
CKG1B50-75YAL
CKG1B50-75YL
CKG1B50-75Y-X276A
CKG1B63-100
CKG1B63-100Y
CKG1B63-100YA
CKG1B63-100YA-P
CKG1B63-100YZ
CKG1B63-125
CKG1B63-125I
CKG1B63-125Y
CKG1B63-125YA
CKG1B63-150Y
CKG1B63-150YA
CKG1B63-50
CKG1B63-50Y
CKG1B63-50YA
CKG1B63-50Z
CKG1B63-75
CKG1B63-75Y
CKG1B63-75YA
CKG1P63-150YA-P
CKG1P63-150Y-P
CKG40-R050
CKG40-R075
CKG40-R100
CKGA100-125Y
CKGA100-150YL
CKGA100-150Y-P
CKGA32-100Y-X1046
CKGA32-125Y-X1046
CKGA32-75Y-X1046
CKGA32-B6859-100Y
CKGA32-B6859-125Y
CKGA32-B6859-150Y
CKGA32-B6859-50Y
CKGA32-B6859-75Y
CKGA80-100Y
CKGA80-125Y
CKGA80-150YL
CKGA80-50Y
CKP1A63-100Y
CKP1A63-100YA
CKP1A63-125
CKP1A63-125Y
CKP1A63-125YA
CKP1A63-125YA-P74
CKP1A63-125Y-P74
CKP1A63-150
CKP1A63-150Y-P74-85G-X906
CKP1A63-150Y
CKP1A63-150YA
CKP1A63-200Y
CKP1A63-200YA
CKP1A63-50Y-P74-85G-X1442
CKP1A63-50Y
CKP1A63-50YA
CKP1A63-75Y
CKP1A63-75YA
CKP1A63-75YA-P74
CKP1A63-75Y-P74
CKP1A63-75Y-P74-85G-X404
CKP1A63-B5052-50Y
CKP1A63-S0971-50
CKP1A63-S0971-75
CKP1AM63-200Y
CKPA80-150Y
CKQ40-25-DCH244DH
CKQ40-25-DCH245DH
CKQ40-25-DCH248DH
CKQ40-25-DCH249DH
CKQ40-P6136-25
CKQ40-P6138-25
CKQ40-P6140-25
CKQ40-P6142-25
CKQ40-P9616-25
CKQ40-W0377-25
CKQ40-W0378-25
CKQ40-W3950-25
CKQ40-W3951-25
CKQ50-15-DCJ9682J
CKQ50-DCG2437GA15
CKQ50-DCG2438GA15
CKQ50-DCG5907GL12
CKQ50-DCG5918GCA15
CKQ50-DCG7225G-16
CKQ50-DCG7226G-16
CKQ50-DCG5918GCA15
CKQ50-P5743-30
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CKQ50-W3247-15
CKQ50-W3247A15
CKQ50-W3247B15
CKQ50-W8040A15
CKQ50-W8041A15
CKQGDB50-199RALS
CKQN50-25-155WA
CKQN50-25-158WA
CKQSC50-125RC
CKQSF50-125RDS
CHDKGB80150XB11
CHDMB20-Z0860
CHDMB20-200
CHDMB20-25
CHDMB20-40
CHDMB20-75
CHDMB20Z0860155
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CHDMB32-80
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CHDMB40K
CHDMC20-75
CHDMC32-80
CHDMC40-25
CHDMF20-40
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CHDMF32-350
CHDMF32-50
CHDMF32K
CHDMG20-205
CHDMG32-75
CHDML20-400
CHDML25-200
CHDQB100-100
CHDQB100-100D
CHDQB100-25D
CHDQB100-50D
CHDQB100-75D
CHDQB100R184910
CHDQB20-0128624

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