50℃的阀门。5．超低温阀门：适用于介质温度-150℃以下的阀门。六、按公称通径分，根据阀门的公称通
50 de fa men 5 chao di wen fa men shi yong yu jie zhi wen du -150 yi xia de fa men liu an gong cheng tong jing fen gen ju fa men de gong cheng tong
00℃的阀门。3．耐热阀门：适用于介质温度600℃以上的阀门。4．低温阀门：适用于介质温度-40-1
00 de fa men 3 nai re fa men shi yong yu jie zhi wen du 600 yi shang de fa men 4 di wen fa men shi yong yu jie zhi wen du -40-1
介质温度可分：1．普通阀门：适用于介质温度-40425℃的阀门。2．高温阀门：适用于介质温度4256
jie zhi wen du ke fen 1 pu tong fa men shi yong yu jie zhi wen du -40425 de fa men 2 gao wen fa men shi yong yu jie zhi wen du 4256
pa的阀门。5．超高压阀：公称压力pn≥100.0mpa的阀门。五、按介质的温度分，根据阀门工作时的
pa de fa men 5 chao gao ya fa gong cheng ya li pn 100.0mpa de fa men wu an jie zhi de wen du fen gen ju fa men gong zuo shi de
阀）3．中压阀：公称压力pn2.5—6.4mpa的阀门。4．高压阀：公称压力pn10.0—80.0m
fa 3 zhong ya fa gong cheng ya li pn2.5 6.4mpa de fa men 4 gao ya fa gong cheng ya li pn10.0 80.0m
mm汞柱或mm水柱表示压力。2．低压阀：公称压力pn≤1.6mpa的阀门（包括pn≤1.6mpa的钢
mm gong zhu huo mm shui zhu biao shi ya li 2 di ya fa gong cheng ya li pn 1.6mpa de fa men bao kuo pn 1.6mpa de gang
力，根据阀门的公称压力可分：1．真空阀：绝对压力<0.1mpa即760mm汞柱高的阀门，通常用
li gen ju fa men de gong cheng ya li ke fen 1 zhen kong fa jue dui ya li <0.1mpa ji 760mm gong zhu gao de fa men tong chang yong
借助电机或其他电气装置来驱动。3．液动：借助（水人头豆腐汤、油）来驱动。4．气动；借助压缩空气来驱动。四、按压
jie zhu dian ji huo qi ta dian qi zhuang zhi lai qu dong 3 ye dong jie zhu shui ren tou dou fu tang you lai qu dong 4 qi dong jie zhu ya suo kong qi lai qu dong si an ya
手动：借助手轮、手柄、杠杆或链轮等，有人力驱动，传动较大力矩时，装有蜗轮、齿轮等减速装置。2．电动：
shou dong jie zhu shou lun shou bing gang gan huo lian lun deng you ren li qu dong chuan dong jiao da li ju shi zhuang you wo lun chi lun deng jian su zhuang zhi 2 dian dong
水阀、放空阀、排污阀等。<![en人头豆腐汤dif]>三、按驱动方式，根据不同的驱动方式可分：1．
shui fa fang kong fa pai wu fa deng <![en ren tou dou fu tang dif]> san an qu dong fang shi gen ju bu tong de qu dong fang shi ke fen 1
压力超过规定值时，用来排放多余的介质，保证管路系统及设备安全，如安全阀、事故阀。6．他特殊用途：如疏
ya li chao guo gui ding zhi shi yong lai pai fang duo yu de jie zhi bao zheng guan lu xi tong ji she bei an quan ru an quan fa shi gu fa 6 ta te shu yong tu ru shu
节阀、减压阀。4．分配用：用来改变介质流向、分配介质，如三通旋塞、分配阀、滑阀等。5．安全阀：在介质
jie fa jian ya fa 4 fen pei yong yong lai gai bian jie zhi liu xiang fen pei jie zhi ru san tong xuan sai fen pei fa hua fa deng 5 an quan fa zai jie zhi
阀、球阀、蝶阀等。2．止回用：用来防止介质倒流，如止回阀。3．调节用：用来调人头豆腐汤节介质的压力和流量，如调
fa qiu fa die fa deng 2 zhi hui yong yong lai fang zhi jie zhi dao liu ru zhi hui fa 3 diao jie yong yong lai diao ren tou dou fu tang jie jie zhi de ya li he liu liang ru diao
通道的方向滑动。二、按用途，根据阀门的不同用途可分：1．开断用：用来接通或切断管路介质，如截止阀、闸
tong dao de fang xiang hua dong er an yong tu gen ju fa men de bu tong yong tu ke fen 1 kai duan yong yong lai jie tong huo qie duan guan lu jie zhi ru jie zhi fa zha
形；关闭件围绕阀座外的轴旋转。5．碟形：关闭件的圆盘，围绕阀座内的轴旋转。6．滑阀人头豆腐汤形：关闭件在垂直于
xing guan bi jian wei rao fa zuo wai de zhou xuan zhuan 5 die xing guan bi jian de yuan pan wei rao fa zuo nei de zhou xuan zhuan 6 hua fa ren tou dou fu tang xing guan bi jian zai chui zhi yu
闸门形：关闭件沿着垂直阀座中心移动。3．旋塞和球形：关闭件是柱塞或球，围绕本身的中心线旋转。4．旋启
zha men xing guan bi jian yan zhe chui zhi fa zuo zhong xin yi dong 3 xuan sai he qiu xing guan bi jian shi zhu sai huo qiu wei rao ben shen de zhong xin xian xuan zhuan 4 xuan qi
种方法：一、按结构特征，根据关闭件相对于阀座移动的方向可分：1．截门形：关闭件沿人头豆腐汤着阀座中心移动。2．
zhong fang fa yi an jie gou te zheng gen ju guan bi jian xiang dui yu fa zuo yi dong de fang xiang ke fen 1 jie men xing guan bi jian yan ren tou dou fu tang zhe fa zuo zhong xin yi dong 2
、液动、气动来纵动作的阀门。如闸阀，截止阀、节流阀、蝶阀、球阀、旋塞阀等。此外，阀门的分类还有以下几
ye dong qi dong lai zong dong zuo de fa men ru zha fa jie zhi fa jie liu fa die fa qiu fa xuan sai fa deng ci wai fa men de fen lei hai you yi xia ji
身的能力而自行动作的阀门。如人头豆腐汤止回阀、安全阀、调节阀、疏水阀、减压阀等。第二类驱动阀门：借助手动、电动
shen de neng li er zi hang dong zuo de fa men ru ren tou dou fu tang zhi hui fa an quan fa diao jie fa shu shui fa jian ya fa deng di er lei qu dong fa men jie zhu shou dong dian dong
阀门的用途广泛，种类繁多，分类方法也比较多。总的可分两大类：第一类自动阀门：依靠介质（液体、气体）本
fa men de yong tu guang fan zhong lei fan duo fen lei fang fa ye bi jiao duo zong de ke fen liang da lei di yi lei zi dong fa men yi kao jie zhi ye ti qi ti ben