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FAIRCHILD仙童减压阀与溢流阀的区别
（1）静止状态，减压阀阀口常开，溢流阀阀口常闭；
（2）减压阀控制出口压力稳定，而溢流阀控制进口压力稳定；
（3）减压阀阀口随出口压力的升高而关小，溢流阀阀口随进口压力的升高而开大；
（4）减压阀进出油口都是压力油路，经先导阀的回油必须单独引回油箱，而溢流阀则和出口合并一同流回油箱
FAIRCHILD仙童减压阀按结构形式可分为薄膜式、弹簧薄膜式、活塞式、杠杆式和波纹管式；按阀座数目可人为单座式和双座式；按阀瓣的位置不同可分为正作用式和反作用式。先导式减压阀当减压阀的输出压力较高或通径较大时，用调压弹簧直接调压，则弹簧刚度必然过大，流量变化时，输出压力波动较大，阀的结构尺寸也将增大。为了克服这些缺点，可采用先导式减压阀。先导式减压阀的工作原理与直动式的基本相同。先导式减压阀所用的调压气体，是由小型的直动式减压阀供给的。若把小型直动式减压阀装在阀体内部，则称为内部先导式减压阀；若将小型直动式减压阀装在主阀体外部，则称为外部先导式减压阀。
FAIRCHILD仙童减压阀的是靠阀内流道对水流的局部阻力降低水压，水压降的范围由连接阀瓣的薄膜或活塞两侧的进出口水压差自动调节。定比减压原理是利用阀体中浮动活塞的水压比控制，进出口端减压比与进出口侧活塞面积比成反比。这种减压阀工作平稳无振动；阀体内无弹簧，故无弹簧锈蚀、金属疲劳失效之虑；密封性能良好不渗漏，因而既减动压（水流动时）又减静压（流量为0时）；特别是在减压的同时不影响水流量
美国FAIRCHILD仙童减压阀常用型号
10202BR,10202BT,10202C,10202CL,10202CR,10202CT,10202CU, 10202E,10202EL,10202ET,10202H,10202HJN,10202HN,10202J,10202JN, 10202JNT,10202JSC,10202L,10202N,10202NSCU,10202NT,10202NU,10202P, 10202R,10202RU,10202SC,10202T,10202U,10203,10203A,10203B,10203BE,10203C, 10203CT,10203CU,10203EL,10203EN,10203ENT,10203ET,10203HT,10203J,10203JN,10203JNT, 10203JU,10203L,10203N,10203NU10203R,10203T,10203U,10204,10204A,10204B,10204BET,10204C,10204E,10204EJP,10204EN, 10204H,10204HJN,10204J,10204JN,10204N,10204RN,10204T,10204U,10212,10212AE,10212B,10212BE, 10212BEH,10212BEJSC, 10212BESC,10212BH,10212BT,10212C,10212CH,10212CJ,10212CLT,10212CP,10212CU,10212E,10212EH, 10212EHJ,10212EHT,10212EJ,10212EJLT,10212EJNT,10212EL,10212EN,10212ET10212H,10212HJN10212HJNSC,10212HJP,10212HL,10212HN,10212HSC,10212J,10212JLT,10212JN,10212JNSCT,10212JNU, 10212JSC,10212JT,10212L,10212LT,10212LTU,10212N,10212NT,10212NU,10212P,10212R,10212SC,10212T10212TU,10212U,10213,10213ACR,10213C,10213CL,10213E,10213EJU,10213ET,10213HN,10213J,10213JN10213JNU,10213JU,10213L,10213LT,10213N,10213NT,10213NU,10213R,10213T,10213U,10214,10214A, 10214BEJSC, 10214BT,10214C,10214CE,10214CLT,10214E,10214EH,10214EHJ,10214EHT,10214H,10214HN,10214J, 10214JN,10214JNU,10214L,10214N,10214NT,10214T,10214U,10222,10222A,10222ASC,10222B,10222BEH,
10222BH,10222BJ, 10222C,10222CL,10222CT,10222CU,10222E,10222EH,10222EJ,,10222EJLT,10222EL,10222EN, 10222ENT,10222ET,10222H,10222HJ,10222HJN,10222HN,10222HSC,10222J,10222JN,10222JNSC,10222JNT, 10222JNU,10222JSC, 10222JT,10222JU,10222L,10222LT,10222N,10222NSC,10222NT,10222NTU,10222NU,10222P, 10222R,10222SC,10222T,10222TU,10222U,10223,10223A,10223AB,10223AT,10223B10223BE,10223BEJT,10223C,10223CT,10223CU,10223E,10223EJU,10223EL,10223HN, 10223HT,10223J, 10223JN,10223JNT,10223JNU, 10223JU,10223L,10223LT,10223N,10223NT,10223NU,10223R,10223SC,10223T10223TU,10223U,10224,10224B,10224BEJSC,10224BT,10224C,10224CU,10224E, 10224EJLT,10224EN,10224H,10224HJ,10224J,10224JN,
10224JU,10224L,10224N,10224NT,10224NU,10224T,10224U,10232,10232A10232AB,10232AN,10232ASC,10232B,10232BE,10232BEH,10232BEHJSC,10232BET, 10232BTU,10232C,10232CB,10232CE,10232CH, 10232CJ,10232CT,10232CU,10232E,10232EH,10232EHJSC,10232EJ,10232EJN,10232EL, 10232EN,10232ENT,10232ESC,10232ET,10232H,10232HJ,10232HN,10232J,10232JN, 10232JNSC,10232JNT,10232JNU,10232JR,10232JSC, 10232JT,10232JU,10232L,10232N,10232NSCU,10232NT,10232NU,10232P10232R,10232RH,10232RU,10232SC,10232T,10232U,10233,10233A,10233B
联系人：任静
电话：0769-89978203
传真：0769-22301098 发传真请注明-任静收
手机：18122867394
QQ：1013858782
（1）静止状态，减压阀阀口常开，溢流阀阀口常闭；
（2）减压阀控制出口压力稳定，而溢流阀控制进口压力稳定；
（3）减压阀阀口随出口压力的升高而关小，溢流阀阀口随进口压力的升高而开大；
（4）减压阀进出油口都是压力油路，经先导阀的回油必须单独引回油箱，而溢流阀则和出口合并一同流回油箱
FAIRCHILD仙童减压阀按结构形式可分为薄膜式、弹簧薄膜式、活塞式、杠杆式和波纹管式；按阀座数目可人为单座式和双座式；按阀瓣的位置不同可分为正作用式和反作用式。先导式减压阀当减压阀的输出压力较高或通径较大时，用调压弹簧直接调压，则弹簧刚度必然过大，流量变化时，输出压力波动较大，阀的结构尺寸也将增大。为了克服这些缺点，可采用先导式减压阀。先导式减压阀的工作原理与直动式的基本相同。先导式减压阀所用的调压气体，是由小型的直动式减压阀供给的。若把小型直动式减压阀装在阀体内部，则称为内部先导式减压阀；若将小型直动式减压阀装在主阀体外部，则称为外部先导式减压阀。
FAIRCHILD仙童减压阀的是靠阀内流道对水流的局部阻力降低水压，水压降的范围由连接阀瓣的薄膜或活塞两侧的进出口水压差自动调节。定比减压原理是利用阀体中浮动活塞的水压比控制，进出口端减压比与进出口侧活塞面积比成反比。这种减压阀工作平稳无振动；阀体内无弹簧，故无弹簧锈蚀、金属疲劳失效之虑；密封性能良好不渗漏，因而既减动压（水流动时）又减静压（流量为0时）；特别是在减压的同时不影响水流量
美国FAIRCHILD仙童减压阀常用型号
10202BR,10202BT,10202C,10202CL,10202CR,10202CT,10202CU, 10202E,10202EL,10202ET,10202H,10202HJN,10202HN,10202J,10202JN, 10202JNT,10202JSC,10202L,10202N,10202NSCU,10202NT,10202NU,10202P, 10202R,10202RU,10202SC,10202T,10202U,10203,10203A,10203B,10203BE,10203C, 10203CT,10203CU,10203EL,10203EN,10203ENT,10203ET,10203HT,10203J,10203JN,10203JNT, 10203JU,10203L,10203N,10203NU10203R,10203T,10203U,10204,10204A,10204B,10204BET,10204C,10204E,10204EJP,10204EN, 10204H,10204HJN,10204J,10204JN,10204N,10204RN,10204T,10204U,10212,10212AE,10212B,10212BE, 10212BEH,10212BEJSC, 10212BESC,10212BH,10212BT,10212C,10212CH,10212CJ,10212CLT,10212CP,10212CU,10212E,10212EH, 10212EHJ,10212EHT,10212EJ,10212EJLT,10212EJNT,10212EL,10212EN,10212ET10212H,10212HJN10212HJNSC,10212HJP,10212HL,10212HN,10212HSC,10212J,10212JLT,10212JN,10212JNSCT,10212JNU, 10212JSC,10212JT,10212L,10212LT,10212LTU,10212N,10212NT,10212NU,10212P,10212R,10212SC,10212T10212TU,10212U,10213,10213ACR,10213C,10213CL,10213E,10213EJU,10213ET,10213HN,10213J,10213JN10213JNU,10213JU,10213L,10213LT,10213N,10213NT,10213NU,10213R,10213T,10213U,10214,10214A, 10214BEJSC, 10214BT,10214C,10214CE,10214CLT,10214E,10214EH,10214EHJ,10214EHT,10214H,10214HN,10214J, 10214JN,10214JNU,10214L,10214N,10214NT,10214T,10214U,10222,10222A,10222ASC,10222B,10222BEH,
10222BH,10222BJ, 10222C,10222CL,10222CT,10222CU,10222E,10222EH,10222EJ,,10222EJLT,10222EL,10222EN, 10222ENT,10222ET,10222H,10222HJ,10222HJN,10222HN,10222HSC,10222J,10222JN,10222JNSC,10222JNT, 10222JNU,10222JSC, 10222JT,10222JU,10222L,10222LT,10222N,10222NSC,10222NT,10222NTU,10222NU,10222P, 10222R,10222SC,10222T,10222TU,10222U,10223,10223A,10223AB,10223AT,10223B10223BE,10223BEJT,10223C,10223CT,10223CU,10223E,10223EJU,10223EL,10223HN, 10223HT,10223J, 10223JN,10223JNT,10223JNU, 10223JU,10223L,10223LT,10223N,10223NT,10223NU,10223R,10223SC,10223T10223TU,10223U,10224,10224B,10224BEJSC,10224BT,10224C,10224CU,10224E, 10224EJLT,10224EN,10224H,10224HJ,10224J,10224JN,
10224JU,10224L,10224N,10224NT,10224NU,10224T,10224U,10232,10232A10232AB,10232AN,10232ASC,10232B,10232BE,10232BEH,10232BEHJSC,10232BET, 10232BTU,10232C,10232CB,10232CE,10232CH, 10232CJ,10232CT,10232CU,10232E,10232EH,10232EHJSC,10232EJ,10232EJN,10232EL, 10232EN,10232ENT,10232ESC,10232ET,10232H,10232HJ,10232HN,10232J,10232JN, 10232JNSC,10232JNT,10232JNU,10232JR,10232JSC, 10232JT,10232JU,10232L,10232N,10232NSCU,10232NT,10232NU,10232P10232R,10232RH,10232RU,10232SC,10232T,10232U,10233,10233A,10233B
联系人：任静
电话：0769-89978203
传真：0769-22301098 发传真请注明-任静收
手机：18122867394
QQ：1013858782
