全(quan)焊(han)接(jie)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)为(wei)全(quan)通(tong)径，具有较强的(de)流(liu)通(tong)能力，阀(fa)(fa)(fa)(fa)(fa)体(ti)结构采用(yong)整体(ti)式焊(han)接(jie)，不(bu)会出(chu)现(xian)外部(bu)泄漏等(deng)现(xian)象，球(qiu)(qiu)(qiu)(qiu)(qiu)体(ti)的(de)加工(gong)精(jing)度高，操作轻便。全(quan)焊(han)接(jie)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)凭借其优(you)良的(de)特(te)性(xing)(xing)，广泛应用(yong)于天然(ran)(ran)气和油品长输管道。在工(gong)作过(guo)(guo)程中(zhong)，球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)通(tong)过(guo)(guo)球(qiu)(qiu)(qiu)(qiu)(qiu)体(ti)的(de)转动实现(xian)启闭(bi)，阀(fa)(fa)(fa)(fa)(fa)门内(nei)部(bu)介(jie)(jie)质(zhi)的(de)流(liu)动特(te)性(xing)(xing)影响阀(fa)(fa)(fa)(fa)(fa)门的(de)使用(yong)寿命。流(liu)阻(zu)系(xi)(xi)数(shu)(shu)(shu)属(shu)于阀(fa)(fa)(fa)(fa)(fa)门的(de)固有属(shu)性(xing)(xing)，只(zhi)与(yu)阀(fa)(fa)(fa)(fa)(fa)门结构有关，而流(liu)量(liang)系(xi)(xi)数(shu)(shu)(shu)则比较复杂，与(yu)介(jie)(jie)质(zhi)属(shu)性(xing)(xing)、介(jie)(jie)质(zhi)流(liu)动状(zhuang)态、阀(fa)(fa)(fa)(fa)(fa)门结构等(deng)诸多因素(su)相关。利(li)用(yong)FLUENT软件对(dui)全(quan)焊(han)接(jie)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)（筒状(zhuang)）内(nei)部(bu)三维流(liu)场进行数(shu)(shu)(shu)值模拟，探究球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)从关闭(bi)到(dao)完全(quan)开启过(guo)(guo)程的(de)流(liu)量(liang)特(te)性(xing)(xing)。以(yi)不(bu)可(ke)压(ya)缩介(jie)(jie)质(zhi)（水(shui)）为(wei)例，分析7个不(bu)同开度（10%、30%、50%、70%、80%、90%、100%）下(xia)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)内(nei)部(bu)流(liu)场的(de)变(bian)化情况，得(de)到(dao)该球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)的(de)前后压(ya)差(cha)和进出(chu)口(kou)流(liu)量(liang)，并(bing)计算得(de)到(dao)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)的(de)流(liu)阻(zu)系(xi)(xi)数(shu)(shu)(shu)，然(ran)(ran)后根据相关公(gong)式求得(de)不(bu)同开度下(xia)水(shui)的(de)流(liu)量(liang)系(xi)(xi)数(shu)(shu)(shu)。浙江克亚阀(fa)(fa)(fa)(fa)(fa)门有限公(gong)司为(wei)您(nin)提供气动高平台(tai)球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)设备，有需(xu)要可(ke)以(yi)联(lian)系(xi)(xi)我司哦！北京美(mei)标高平台(tai)法兰球(qiu)(qiu)(qiu)(qiu)(qiu)阀(fa)(fa)(fa)(fa)(fa)报(bao)价

随着对(dui)(dui)(dui)球(qiu)(qiu)(qiu)阀(fa)(fa)研(yan)究(jiu)的(de)不断深入，I.Florescu等利(li)用FLUENT对(dui)(dui)(dui)球(qiu)(qiu)(qiu)阀(fa)(fa)不同(tong)开(kai)(kai)度下(xia)的(de)液压(ya)(ya)能(neng)量损(sun)失进行(xing)模(mo)拟(ni)(ni)(ni)分析(xi)(xi)；ChernMing－Jyh等利(li)用数值模(mo)拟(ni)(ni)(ni)与实验相结合(he)的(de)方法，得(de)出在(zai)(zai)球(qiu)(qiu)(qiu)阀(fa)(fa)开(kai)(kai)度为50%～100%时(shi)，加60°V型端口(kou)(kou)可(ke)(ke)以控(kong)制体(ti)积流(liu)(liu)(liu)量线性(xing)(xing)变(bian)化的(de)结论；P.Merati等经过计算得(de)到斯德鲁哈尔(er)数和雷(lei)诺(nuo)数之间的(de)关系(xi)式(shi)(shi)，运用试验和CFD数值模(mo)拟(ni)(ni)(ni)验证此经验公(gong)式(shi)(shi)可(ke)(ke)用于共振(zhen)的(de)衰减；赵莹等、屈铎(duo)等利(li)用CFD研(yan)究(jiu)了球(qiu)(qiu)(qiu)阀(fa)(fa)在(zai)(zai)不同(tong)开(kai)(kai)度下(xia)，涡(wo)流(liu)(liu)(liu)的(de)发展变(bian)化趋势；沈(shen)新荣等利(li)用FLUENT对(dui)(dui)(dui)球(qiu)(qiu)(qiu)阀(fa)(fa)的(de)流(liu)(liu)(liu)量特性(xing)(xing)进行(xing)了模(mo)拟(ni)(ni)(ni)分析(xi)(xi)；韩宁用FLUENT对(dui)(dui)(dui)特大口(kou)(kou)径(jing)环喷(pen)式(shi)(shi)流(liu)(liu)(liu)量调节阀(fa)(fa)和桁架(jia)式(shi)(shi)蝶阀(fa)(fa)进行(xing)了流(liu)(liu)(liu)场(chang)的(de)模(mo)拟(ni)(ni)(ni)，并(bing)(bing)深入研(yan)究(jiu)了阀(fa)(fa)门结构和流(liu)(liu)(liu)阻(zu)特性(xing)(xing)。上(shang)述研(yan)究(jiu)均是针对(dui)(dui)(dui)不可(ke)(ke)压(ya)(ya)介质(zhi)展开(kai)(kai)的(de)，目前对(dui)(dui)(dui)可(ke)(ke)压(ya)(ya)介质(zhi)的(de)研(yan)究(jiu)分析(xi)(xi)相对(dui)(dui)(dui)较少。本(ben)文(wen)利(li)用流(liu)(liu)(liu)体(ti)动力(li)学和FLUENT，模(mo)拟(ni)(ni)(ni)研(yan)究(jiu)球(qiu)(qiu)(qiu)阀(fa)(fa)在(zai)(zai)不同(tong)开(kai)(kai)度、不同(tong)介质(zhi)下(xia)的(de)流(liu)(liu)(liu)动特性(xing)(xing)，并(bing)(bing)根据相关公(gong)式(shi)(shi)拟(ni)(ni)(ni)合(he)转化得(de)到可(ke)(ke)压(ya)(ya)介质(zhi)流(liu)(liu)(liu)量系(xi)数和流(liu)(liu)(liu)阻(zu)系(xi)数与开(kai)(kai)度之间的(de)关系(xi)曲线。北京美标高(gao)平台法兰球(qiu)(qiu)(qiu)阀(fa)(fa)报价浙江(jiang)克(ke)亚阀(fa)(fa)门有(you)限公(gong)司致力(li)于提供气动高(gao)平台球(qiu)(qiu)(qiu)阀(fa)(fa)设(she)备，有(you)需要可(ke)(ke)以联系(xi)我司哦！

开(kai)启时，气缸(gang)(gang)操纵气以一(yi)定的(de)(de)(de)(de)压(ya)力从活(huo)(huo)塞(sai)下(xia)面的(de)(de)(de)(de)进口(kou)加入使(shi)活(huo)(huo)塞(sai)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)阀(fa)(fa)(fa)(fa)杆(gan)往(wang)上(shang)(shang)(shang)移(yi)(yi)(yi)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)，这时运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)要(yao)实现(xian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作(zuo)的(de)(de)(de)(de)三(san)次变换(huan)(huan)：第(di)一(yi)步(bu)是上(shang)(shang)(shang)下(xia)阀(fa)(fa)(fa)(fa)杆(gan)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)(qiu)体(ti)(ti)上(shang)(shang)(shang)移(yi)(yi)(yi)，使(shi)球(qiu)(qiu)体(ti)(ti)与(yu)(yu)阀(fa)(fa)(fa)(fa)座(zuo)至(zhi)松开(kai)位(wei)(wei)置；第(di)二步(bu)运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)中(zhong)主动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)与(yu)(yu)被动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)零(ling)件(jian)啮(nie)合(he)(he)(he)，活(huo)(huo)塞(sai)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)上(shang)(shang)(shang)阀(fa)(fa)(fa)(fa)杆(gan)继续上(shang)(shang)(shang)移(yi)(yi)(yi)，下(xia)阀(fa)(fa)(fa)(fa)杆(gan)在(zai)啮(nie)合(he)(he)(he)后在(zai)限(xian)位(wei)(wei)措施(shi)作(zuo)用(yong)下(xia)实现(xian)90°旋转(zhuan)，阀(fa)(fa)(fa)(fa)门流道导通(tong)；第(di)三(san)步(bu)运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)中(zhong)主动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)与(yu)(yu)被动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)零(ling)件(jian)脱(tuo)开(kai)啮(nie)合(he)(he)(he)，上(shang)(shang)(shang)下(xia)阀(fa)(fa)(fa)(fa)杆(gan)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)(qiu)体(ti)(ti)继续上(shang)(shang)(shang)移(yi)(yi)(yi)，至(zhi)球(qiu)(qiu)体(ti)(ti)阀(fa)(fa)(fa)(fa)瓣(ban)结(jie)(jie)构(gou)与(yu)(yu)一(yi)级(ji)外(wai)漏密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)座(zuo)接触并密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)。关闭时，气缸(gang)(gang)操纵气以一(yi)定的(de)(de)(de)(de)压(ya)力从活(huo)(huo)塞(sai)上(shang)(shang)(shang)面的(de)(de)(de)(de)进口(kou)加入使(shi)活(huo)(huo)塞(sai)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)阀(fa)(fa)(fa)(fa)杆(gan)往(wang)下(xia)移(yi)(yi)(yi)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)，这时运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)也(ye)要(yao)实现(xian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作(zuo)的(de)(de)(de)(de)三(san)次变换(huan)(huan)：第(di)一(yi)步(bu)运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)中(zhong)主动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)与(yu)(yu)被动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)零(ling)件(jian)没啮(nie)合(he)(he)(he)，上(shang)(shang)(shang)下(xia)阀(fa)(fa)(fa)(fa)杆(gan)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)(qiu)体(ti)(ti)下(xia)移(yi)(yi)(yi)，至(zhi)球(qiu)(qiu)体(ti)(ti)阀(fa)(fa)(fa)(fa)瓣(ban)结(jie)(jie)构(gou)与(yu)(yu)一(yi)级(ji)外(wai)漏密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)座(zuo)脱(tuo)开(kai)；第(di)二步(bu)运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)中(zhong)主动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)与(yu)(yu)被动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)零(ling)件(jian)啮(nie)合(he)(he)(he)，活(huo)(huo)塞(sai)带(dai)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)上(shang)(shang)(shang)阀(fa)(fa)(fa)(fa)杆(gan)继续下(xia)移(yi)(yi)(yi)，下(xia)阀(fa)(fa)(fa)(fa)杆(gan)在(zai)啮(nie)合(he)(he)(he)后在(zai)限(xian)位(wei)(wei)措施(shi)作(zuo)用(yong)下(xia)实现(xian)90°旋转(zhuan)，阀(fa)(fa)(fa)(fa)门处于关闭状态；第(di)三(san)步(bu)运动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)转(zhuan)换(huan)(huan)机(ji)构(gou)中(zhong)主动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)与(yu)(yu)被动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)零(ling)件(jian)脱(tuo)开(kai)啮(nie)合(he)(he)(he)，上(shang)(shang)(shang)下(xia)阀(fa)(fa)(fa)(fa)杆(gan)下(xia)移(yi)(yi)(yi)并推动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)(qiu)体(ti)(ti)与(yu)(yu)阀(fa)(fa)(fa)(fa)座(zuo)至(zhi)楔紧密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)位(wei)(wei)置。系统(tong)工(gong)作(zuo)状态下(xia)气动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)执行器能够(gou)提(ti)供可调节的(de)(de)(de)(de)机(ji)械(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)力使(shi)球(qiu)(qiu)体(ti)(ti)与(yu)(yu)阀(fa)(fa)(fa)(fa)座(zuo)紧密(mi)(mi)(mi)(mi)结(jie)(jie)合(he)(he)(he)保证密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)。系统(tong)不工(gong)作(zuo)时，依靠自密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)弹簧提(ti)供的(de)(de)(de)(de)机(ji)械(xie)里(li)保证系统(tong)在(zai)低(di)压(ya)下(xia)球(qiu)(qiu)阀(fa)(fa)(fa)(fa)照样处于密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)状态。

海(hai)水(shui)淡化过(guo)程中，需(xu)要(yao)特别注意氯化物对设备的(de)腐(fu)(fu)(fu)蚀(shi)。另外(wai)，海(hai)水(shui)温度对腐(fu)(fu)(fu)蚀(shi)速(su)率(lv)影响很(hen)大(da)，温度越高(gao)，腐(fu)(fu)(fu)蚀(shi)越快。而固体污(wu)染(ran)物会(hui)(hui)损害材料保护膜，引起冲(chong)刷腐(fu)(fu)(fu)蚀(shi)。各类化学污(wu)染(ran)物也(ye)会(hui)(hui)提高(gao)腐(fu)(fu)(fu)蚀(shi)概率(lv)。配料添加剂可能是一种(zhong)人为(wei)的(de)海(hai)域(yu)化学品(pin)污(wu)染(ran)物，但(dan)是从腐(fu)(fu)(fu)蚀(shi)角(jiao)度看，适(shi)量则不(bu)会(hui)(hui)引起任何问题。如次(ci)氯酸钠有时用来抑制藻类，但(dan)剂量太大(da)会(hui)(hui)引起严重的(de)点(dian)腐(fu)(fu)(fu)蚀(shi)。海(hai)水(shui)淡化有多种(zhong)工艺(yi)，其(qi)中反(fan)渗透(tou)技术的(de)主(zhu)要(yao)工艺(yi)过(guo)程为(wei)海(hai)水(shui)取水(shui)→前处(chu)理(li)→超滤→反(fan)渗透(tou)→产(chan)品(pin)水(shui)（副(fu)产(chan)反(fan)渗透(tou)浓(nong)液），各工艺(yi)过(guo)程主(zhu)要(yao)介质的(de)组成见(jian)表1（取水(shui)地点(dian)不(bu)同海(hai)水(shui)成分(fen)有所差异）。浙江(jiang)克亚(ya)阀门有限公司致(zhi)力于提供铸钢高(gao)平(ping)台球阀设备，竭诚为(wei)您设备。

偏心球(qiu)阀(fa)在管(guan)路(lu)中主要(yao)用(yong)来(lai)做切(qie)断(duan)(duan)(duan)、分(fen)配和(he)(he)改变介质(zhi)的(de)(de)(de)流动(dong)方(fang)向。球(qiu)阀(fa)是(shi)近年来(lai)被大(da)(da)体采用(yong)的(de)(de)(de)一(yi)种(zhong)新(xin)型阀(fa)门，它具(ju)有(you)(you)(you)以下优(you)点：1.流体阻力(li)(li)小，其阻力(li)(li)系数(shu)与(yu)同长(zhang)度的(de)(de)(de)管(guan)段相(xiang)等。2.结(jie)(jie)构(gou)简单、体积小、重量轻。3.紧密(mi)(mi)(mi)可靠，目前球(qiu)阀(fa)的(de)(de)(de)密(mi)(mi)(mi)封(feng)面(mian)材料大(da)(da)体使用(yong)塑料、密(mi)(mi)(mi)封(feng)性好，在真空系统中也(ye)已大(da)(da)体使用(yong)。4.操作(zuo)方(fang)便(bian)，开(kai)闭(bi)(bi)迅(xun)速，从全开(kai)到(dao)全关(guan)只要(yao)旋(xuan)(xuan)转(zhuan)90°，便(bian)于远距(ju)离(li)的(de)(de)(de)控制。5.维修方(fang)便(bian)，球(qiu)阀(fa)结(jie)(jie)构(gou)简单，密(mi)(mi)(mi)封(feng)圈一(yi)般都(dou)是(shi)活动(dong)的(de)(de)(de)，拆卸更换都(dou)比较方(fang)便(bian)。6.在全开(kai)或全闭(bi)(bi)时(shi)(shi)，球(qiu)体和(he)(he)阀(fa)座的(de)(de)(de)密(mi)(mi)(mi)封(feng)面(mian)与(yu)介质(zhi)隔离(li)，介质(zhi)通过(guo)时(shi)(shi)，不(bu)(bu)会引(yin)起阀(fa)门密(mi)(mi)(mi)封(feng)面(mian)的(de)(de)(de)侵蚀(shi)。7.适(shi)用(yong)范(fan)围广，通径从小到(dao)几毫米，大(da)(da)到(dao)几米，从高(gao)真空至高(gao)压力(li)(li)都(dou)可应用(yong)。球(qiu)旋(xuan)(xuan)转(zhuan)90度时(shi)(shi)，在进(jin)、出口(kou)处应全部(bu)呈现(xian)球(qiu)面(mian)，从而截断(duan)(duan)(duan)流动(dong)。偏心球(qiu)阀(fa)是(shi)一(yi)种(zhong)比较新(xin)型的(de)(de)(de)球(qiu)阀(fa)类别，它有(you)(you)(you)着自(zi)身结(jie)(jie)构(gou)所(suo)独(du)有(you)(you)(you)的(de)(de)(de)一(yi)些优(you)越(yue)性，如开(kai)关(guan)无摩擦，密(mi)(mi)(mi)封(feng)不(bu)(bu)易磨损，启闭(bi)(bi)力(li)(li)矩小。这样可减小所(suo)配执行器的(de)(de)(de)规格。配以多(duo)回(hui)转(zhuan)电(dian)(dian)动(dong)执行机构(gou)，可实现(xian)对介质(zhi)的(de)(de)(de)调(diao)节和(he)(he)严(yan)密(mi)(mi)(mi)切(qie)断(duan)(duan)(duan)。大(da)(da)体适(shi)用(yong)于石油(you)、化工、城市(shi)给排水等要(yao)求严(yan)格切(qie)断(duan)(duan)(duan)的(de)(de)(de)工况。浙江克亚阀(fa)门有(you)(you)(you)限公(gong)司是(shi)一(yi)家专业提供铸钢高(gao)平台球(qiu)阀(fa)设备的(de)(de)(de)公(gong)司，有(you)(you)(you)想法的(de)(de)(de)可以来(lai)电(dian)(dian)咨询！上海高(gao)平台电(dian)(dian)动(dong)球(qiu)阀(fa)安装

浙江克(ke)亚阀(fa)(fa)门(men)有(you)限公(gong)司(si)致力(li)于(yu)提供(gong)铸钢高平台(tai)球(qiu)阀(fa)(fa)设(she)备，有(you)想(xiang)法的(de)可(ke)以来电咨询！北京美标高平台(tai)法兰球(qiu)阀(fa)(fa)报(bao)价(jia)

球(qiu)(qiu)阀(fa)(fa)(fa)(fa)是由旋(xuan)塞阀(fa)(fa)(fa)(fa)演变而来(lai)，不同的(de)(de)(de)是旋(xuan)塞体是球(qiu)(qiu)体，有圆形通(tong)(tong)孔或通(tong)(tong)道通(tong)(tong)过(guo)其(qi)轴(zhou)线。当(dang)球(qiu)(qiu)旋(xuan)转(zhuan)90°时，在进、出口处(chu)应(ying)全(quan)部呈现球(qiu)(qiu)面(mian)，从而截(jie)断流(liu)动。球(qiu)(qiu)阀(fa)(fa)(fa)(fa)只需(xu)要用(yong)旋(xuan)转(zhuan)90°的(de)(de)(de)操作(zuo)和很(hen)小的(de)(de)(de)转(zhuan)动力矩就能关闭严密。完全(quan)平(ping)等(deng)(deng)的(de)(de)(de)阀(fa)(fa)(fa)(fa)体内(nei)腔为(wei)介(jie)(jie)质提(ti)供了阻力很(hen)小、直(zhi)通(tong)(tong)的(de)(de)(de)流(liu)道。通(tong)(tong)常认(ren)为(wei)球(qiu)(qiu)阀(fa)(fa)(fa)(fa)通(tong)(tong)常适宜(yi)直(zhi)接做开闭使用(yong)，但近年来(lai)的(de)(de)(de)发展已(yi)将球(qiu)(qiu)阀(fa)(fa)(fa)(fa)设计成使它具有节流(liu)和控制流(liu)量的(de)(de)(de)用(yong)途。球(qiu)(qiu)阀(fa)(fa)(fa)(fa)的(de)(de)(de)主(zhu)要特(te)点是本(ben)身结构紧凑，易于操作(zuo)和维(wei)修(xiu)，适用(yong)于水、溶剂、酸和天(tian)然气(qi)等(deng)(deng)一般(ban)工作(zuo)介(jie)(jie)质，而且还(hai)适用(yong)于工作(zuo)条件恶劣的(de)(de)(de)介(jie)(jie)质，如氧气(qi)、过(guo)氧化氢(qing)、甲烷和乙烯等(deng)(deng)。球(qiu)(qiu)阀(fa)(fa)(fa)(fa)阀(fa)(fa)(fa)(fa)体可以是整体的(de)(de)(de)，也(ye)可以是组合式的(de)(de)(de)。北京(jing)美标高平(ping)台法兰球(qiu)(qiu)阀(fa)(fa)(fa)(fa)报价(jia)

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