试验金属密封非金属密封≤ 5015151565~200301560250~45060301802、
shi yan jin shu mi feng fei jin shu mi feng 5015151565~200301560250~45060301802
门试验持续时间按上表。阀门试验持续时间公称直径 dn(mm)最短试验持续时间（ s ）严密性试验强度
men shi yan chi xu shi jian an shang biao fa men shi yan chi xu shi jian gong cheng zhi jing dn(mm) zui duan shi yan chi xu shi jian s yan mi xing shi yan qiang du
公称压力的 1.5 倍；c、试验压力在试验持续时间内应保持不变，且壳体填料及阀瓣密封面无渗漏；d、阀
gong cheng ya li de 1.5 bei c shi yan ya li zai shi yan chi xu shi jian nei ying bao chi bu bian qie ke ti tian liao ji fa ban mi feng mian wu shen lou d fa
严密性试验应符合以下规定。a、阀门的强度试验压力为公称压力的 1.5 倍；b、阀门的严密性试验压力为
yan mi xing shi yan ying fu he yi xia gui ding a fa men de qiang du shi yan ya li wei gong cheng ya li de 1.5 bei b fa men de yan mi xing shi yan ya li wei
上。垂直安装时， 阀盖、阀杆应朝外。（10 ）阀门安装前应做强度和严密性试验。（11 ）阀门的强度和
shang chui zhi an zhuang shi fa gai fa gan ying chao wai 10 fa men an zhuang qian ying zuo qiang du he yan mi xing shi yan 11 fa men de qiang du he
堵 、气阻现象。在管网最高位置 等存气段应设置自动排气阀。（9 ）阀门水平安装时， 阀盖 、阀杆应朝
du qi zu xian xiang zai guan wang zui gao wei zhi deng cun qi duan ying she zhi zi dong pai qi fa 9 fa men shui ping an zhuang shi fa gai fa gan ying chao
路上。（7 ）水力控制阀主阀体上的箭头方向必须与管路系统流向一致。（8 ）接水力控制阀管段不 应有气
lu shang 7 shui li kong zhi fa zhu fa ti shang de jian tou fang xiang bi xu yu guan lu xi tong liu xiang yi zhi 8 jie shui li kong zhi fa guan duan bu ying you qi
制阀；管路采用沟槽式连接时，应采用沟槽式连接的水力控制阀。（6 ）水力控制阀迎奥运演讲稿应设置在介质单向流动的管
zhi fa guan lu cai yong gou cao shi lian jie shi ying cai yong gou cao shi lian jie de shui li kong zhi fa 6 shui li kong zhi fa ying ao yun yan jiang gao ying she zhi zai jie zhi dan xiang liu dong de guan
以便管理、作、安装和维修，并应符合管路对阀门的要求。（5）管路采用法兰连接时，应采用法兰连接的水力控
yi bian guan li zuo an zhuang he wei xiu bing ying fu he guan lu dui fa men de yao qiu 5 guan lu cai yong fa lan lian jie shi ying cai yong fa lan lian jie de shui li kong
别，管道输送的介质，其工迎奥运演讲稿作压力应小于阀门的公称压力值。（4）工程中水力控制阀的设置应当有足够的空间，
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匹配。（3 ）阀门的公称压力有 0.6 、 1.0 、 1.6 、 2.5 和 4.0mpa等不同级
pi pei 3 fa men de gong cheng ya li you 0.6 1.0 1.6 2.5 he 4.0mpa deng bu tong ji
铁、铜、塑料等。常用的密封面和衬里材料有铜合金、塑料、钢、硬质合金、橡胶等。阀体材料应与 管道材料相
tie tong su liao deng chang yong de mi feng mian he chen li cai liao you tong he jin su liao gang ying zhi he jin xiang jiao deng fa ti cai liao ying yu guan dao cai liao xiang
输送介质、温度、建筑标准和业主要要求 等，确定阀门的阀体和密封部位迎奥运演讲稿的材质。常用的阀 体材料有铸铁、铜
shu song jie zhi wen du jian zhu biao zhun he ye zhu yao yao qiu deng que ding fa men de fa ti he mi feng bu wei ying ao yun yan jiang gao de cai zhi chang yong de fa ti cai liao you zhu tie tong
过制造厂检验合格，各种标识齐全，技术资料符合要求的产品。（2）根据功能要求，选择阀门种类，再根据管道
guo zhi zao chang jian yan he ge ge zhong biao shi qi quan ji shu zi liao fu he yao qiu de chan pin 2 gen ju gong neng yao qiu xuan ze fa men zhong lei zai gen ju guan dao
，结合本人的体会来迎奥运演讲稿阐述上述诸方面的问题。1、水力控制阀设计选用要点（1）工程式中应用的水力控制阀是经
jie he ben ren de ti hui lai ying ao yun yan jiang gao chan shu shang shu zhu fang mian de wen ti 1 shui li kong zhi fa she ji xuan yong yao dian 1 gong cheng shi zhong ying yong de shui li kong zhi fa shi jing
，阀的设计选用要求，安装要点等，为此，本文拟以cecs标准《水力控制阀应用设计规程》（送审稿）为基础
fa de she ji xuan yong yao qiu an zhuang yao dian deng wei ci ben wen ni yi cecs biao zhun shui li kong zhi fa ying yong she ji gui cheng song shen gao wei ji chu
生产及消防给水系统管道中起控制与安全作用。但在工程中应迎奥运演讲稿用水力控制阀时，还存在一定误区，如阀的适用条件
sheng chan ji xiao fang gei shui xi tong guan dao zhong qi kong zhi yu an quan zuo yong dan zai gong cheng zhong ying ying ao yun yan jiang gao yong shui li kong zhi fa shi hai cun zai yi ding wu qu ru fa de shi yong tiao jian
特点是：在作用方式上利用介质自身压力及液压系统作，并能自动控制，动作准确、性能可靠，可广泛应用于生活
te dian shi zai zuo yong fang shi shang li yong jie zhi zi shen ya li ji ye ya xi tong zuo bing neng zi dong kong zhi dong zuo zhun que xing neng ke kao ke guang fan ying yong yu sheng huo
总称。主要包括：1）遥控浮球阀；2)减压阀；3)缓闭式止回阀；迎奥运演讲稿4)泄压阀；5)持压阀等等。它们的主要
zong cheng zhu yao bao kuo 1 yao kong fu qiu fa 2) jian ya fa 3) huan bi shi zhi hui fa ying ao yun yan jiang gao 4) xie ya fa 5) chi ya fa deng deng ta men de zhu yao
水力控制阀是由一只主阀及其外装之针形阀和先导阀等组合而成。水力控制阀是一系列多用途控制与安全类阀门的
shui li kong zhi fa shi you yi zhi zhu fa ji qi wai zhuang zhi zhen xing fa he xian dao fa deng zu he er cheng shui li kong zhi fa shi yi xi lie duo yong tu kong zhi yu an quan lei fa men de