⒈汽缸是铸造而成的，汽缸出厂后都要经过时效处理，使汽缸在住铸造过程中所产生的内应力*消除。如果时效时间短，那么加工好的汽缸在以后的运行中还会变形。
⒉汽缸在运行时受力的情况很复杂，除了受汽缸内外气体的压力差和装在其中的各零部件的重量等静载荷外，还要承受蒸汽流出静叶时对静止部分的反作用力，以及各种连接管道冷热状态下对汽缸的作用力，在这些力的相互作用下，汽缸易发生塑性变形造成泄漏。
⒊汽缸的负荷增减过快，特别是快速的启动、停机和工况变化时温度变化大、暖缸的方式不正确、停机检修时打开保温层过早等，在汽缸中和法兰上产生很大的热应力和热变形。
⒋汽缸在机械加工的过程中或经过补焊后产生了应力，但没有对汽缸进行回火处理加以消除，致使汽缸存在较大的残余应力，在运行中产生*的变形。
⒌在安装或检修的过程中，由于检修工艺和检修技术的原因，使内缸、汽缸隔板、隔板套及汽封套的膨胀间隙不合适，或是挂耳压板的膨胀间隙不合适，运行后产生巨大的膨胀力使汽缸变形
⒍使用的汽缸密封剂质量不好、杂质过多或是型号不对；汽缸密封剂内若有坚硬的杂质颗粒就会使密封面难以紧密的结合。
⒎汽缸螺栓的紧力不足或是螺栓的材质不合格。汽缸结合面的严密性主要靠螺栓的紧力来实现的。机组的起停或是增减负荷时产生的热应力和高温会造成螺栓的应力松弛，如果应力不足，螺栓的预紧力就会逐渐减小。如果汽缸的螺栓材质不好，螺栓在长时间的运行当中，在热应力和汽缸膨胀力的作用下被拉长，发生塑性变形或断裂，紧力就会不足，使汽缸发生泄漏的现象。
⒏汽缸螺栓紧固的顺序不正确。一般的汽缸螺栓在紧固时是从中间向两边同时紧固，也就是从垂弧zui大处或是受力变形zui大的地方紧固，这样就会把变形zui大的处的间隙向汽缸前后的自由端转移，zui后间隙渐渐消失。如果是从两边向中间紧，间隙就会集中于中部，汽缸结合面形成弓型间隙，引起蒸汽泄漏。

SMC气缸型号：
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
CKG1A50-125YA-P
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
CKG1A50-50YA-P
CKG1A50-50YBDL
CKG1A50-50Y-P
CKG1A50-50Y-X276A
CKG1A50-50Y-X276B
CKG1A50-75
CKG1A50-75Y
CKG1A50-75YA
CKG1A50-75YABDL
CKG1A50-75YA-P
CKG1A50-75YA-X738
CKG1A50-75YBDL
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
CKG1A63-125YABD-L
CKG1A63-125YAD
CKG1A63-125YA-P
CKG1A63-125YBD-L
CKG1A63-125YD
CKG1A63-125Y-P
CKG1A63-150Y
CKG1A63-150YA
CKG1A63-150YABD-L
CKG1A63-150YA-L
CKG1A63-150YA-P
CKG1A63-150YBD-L
CKG1A63-150Y-L
CKG1A63-150Y-P
CKG1A63-150Z
CKG1A63-200Y
CKG1A63-200Y-P
CKG1A63-30
CKG1A63-300Y-P
CKG1A63-50
CKG1A63-50Y
CKG1A63-50YA
CKG1A63-50YABDL
CKG1A63-50YA-P
CKG1A63-50YBDL
CKG1A63-50Y-P
CKG1A63-75
CKG1A63-75Y
CKG1A63-75YA
CKG1A63-75YABDL
CKG1A63-75YA-P
CKG1A63-75YBDL
CKG1A63-75Y-P
CKG1A63-75Y-P
CKG1A63-KRF0028-125YBDL
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
CKG1B50-150Y
CKG1B50-150YA
CKG1B50-25Y
CKG1B50-25YA
CKG1B50-50
CKG1B50-50-P
CKG1B50-50-X1515
CKG1B50-50Y
CKG1B50-50YA
CKG1B50-75Y
CKG1B50-75YA
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CKG1B50-75YAL
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CKG1B50-75Y-X276A
CKG1B63-100
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CKG1B63-75
CKG1B63-75Y
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CKG1P63-150YA-P
CKG1P63-150Y-P
CKG40-R050
CKG40-R075
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CKGA100-150YL
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CKGA32-125Y-X1046
CKGA32-75Y-X1046
CKGA32-B6859-100Y
CKGA32-B6859-125Y
CKGA32-B6859-150Y
CKGA32-B6859-50Y
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CKGA80-100Y
CKGA80-125Y
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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
CKQ50-P7118-30
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
CHDMB25-50
CHDMB25-75
CHDMB32-100
CHDMB32-80
CHDMB40-250
CHDMB40K
CHDMC20-75
CHDMC32-80
CHDMC40-25
CHDMF20-40
CHDMF25-40
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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