上一次我们讲了压力损失决定横河流量计如何选型,压力损失一般是指流量传感器由于在流通通道中设置的静止或改变流动方向或活动检测元件,从而产生随流量而变的不能恢复的压力损失,其值有时可达数十千帕。因此,我们应按横河质量流量计压力和管道系统泵送能力等确定Z大流量的允许压力损失,以此来选定横河质量流量计。如果选择不当,就会限制流体流动产生过大压力损失而影响流通效率。 另外我们还需要注意的是有些液体(高蒸汽压碳氢液)过度的压力降可能引发液相汽化和气穴现象,降低测量准度甚至损坏横河质量流量计。比如管径大于500mm的输水用的横河质量流量计,应考虑压损所造成的能量损耗过大而增加的泵送费用。据有关报道,压力损失较大的横河流量计几年来为测量付出的泵送费用往往超过低压损、价格较贵的横河流量计的购置费用。 http://www.whamri.com/电话:027-87263542手机:18372021864LED">ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" SANdbox="allow-forms allow-popUPS allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=3%3A32%2C4%3A32%2C8%3A134217728%2C9%3A134250504%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1048576%2C32%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=29.0.0&pra=5&wgl=1&dt=1632988621047&bpp=7&bdt=169&idt=157&shv=r20210922&mjsv=m202109220101&ptt=9&saldr=aa&cookie=ID%3Da07b3c4ba002eaff-22ed306a0ec40076%3AT%3D1602729171%3ART%3D1602729171%3AS%3DALNI_MbBh5yg2uKd0UtH0u1Ylcdyq42wTg&nras=1&correlator=8353769821410&frm=23&ife=1&pv=1&ga_vid=2138698129.1632988621&ga_sid=1632988621&ga_hid=190533556&ga_fc=0&nhd=1&u_tz=480&u_his=8&u_h=1080&u_w=1920&u_ah=1030&u_aw=1920&u_cd=24&u_java=0&u_nplug=14&u_nmime=31&adx=-12245933&ady=-12245933&biw=1048&bih=834&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&eid=44751037&oid=3&pvsid=1591427492031564&pem=217&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fadd_suc%3D1&eae=2&fc=1920&brdim=756%2C13%2C756%2C13%2C1920%2C0%2C1096%2C971%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=32772&bc=31&ifi=1&uci=1.e5ahtgja0i49&fsb=1&dtd=192" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="1.e5ahtgja0i49" data-load-complete="true"> |