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$(".nav_list>ul>li").children("ul").slideUp("fast"); if(!b){ $(this).addClass("cur"); $(this).siblings("ul").slideDown("fast"); } }) }); </script> <div id="lo3iufpk" class="ny_banner"><img src="/skins/30724/images/jswz.png" /></div> <script src="http://www.hbzhan.com/mystat.aspx?u=scjjy"></script> <div id="lo3iufpk" class="ly_crumb"> <img src="/skins/30724/images/crumb_icon.png" /><p>當(dāng)前位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > <span>SEKO計(jì)量泵的選型小技巧</span></p> </div> <div id="lo3iufpk" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">SEKO計(jì)量泵的選型小技巧</h1> <div id="lo3iufpk" class="NyNewsdetail_tips">更新時(shí)間：2023-04-10 點(diǎn)擊次數(shù)：3191</div> <div id="lo3iufpk" class="NyNewsdetail_con"> <div>　　計(jì)量泵也稱定量泵或比例泵。計(jì)量泵屬于往復(fù)式容積泵，用于精確計(jì)量的，通常要求計(jì)量泵的穩(wěn)定性精度不超過±1%。隨著現(xiàn)代化工業(yè)朝著自動(dòng)化操作、遠(yuǎn)距離自動(dòng)控制這一形勢的不斷發(fā)展，計(jì)量泵的配套性強(qiáng)、適應(yīng)介質(zhì)(液體)廣泛的優(yōu)勢尤為顯得特出。<br /> </div><div>　　<strong>選型注意事項(xiàng)：</strong><br /> </div><div>　?、俅_定壓力：所選取計(jì)量泵的額定壓力要略高于所需要的實(shí)際最高壓力，一般高出10～20%。不要選擇過高，壓力過高會(huì)浪費(fèi)能源，增加設(shè)備的投資和運(yùn)行費(fèi)用。②確定流量：所選取的計(jì)量泵流量應(yīng)等于或略大于工藝所需流量。計(jì)量泵流量的使用范圍在計(jì)量泵額定流量范圍的30～100%較好，此時(shí)計(jì)量泵的重復(fù)再現(xiàn)精度高?？紤]到經(jīng)濟(jì)實(shí)用，建議計(jì)量泵的實(shí)際需要流量選擇為計(jì)量泵額定流量的70～90%。<br /> </div><div>　?、鄞_定泵頭(液力端)材質(zhì)：計(jì)量泵的具體型號(hào)規(guī)格確定后，再根據(jù)過流介質(zhì)的屬性選擇過流部分的材質(zhì)，這一步非常重要，若選擇不當(dāng)，將會(huì)造成介質(zhì)腐蝕損壞過流部件或介質(zhì)泄露污染系統(tǒng)等。嚴(yán)重時(shí)還可能造成重大事故。<br /> </div><div>　　④在選擇計(jì)量泵時(shí)，還需要考慮所需計(jì)量泵的精度級別，精度級別越高投入越大。計(jì)量泵一般工作溫度在-30～100℃，特殊計(jì)量泵其工作溫度范圍更寬(如帶保溫夾套的高溫液體計(jì)量泵，其輸送溫度可達(dá)500℃)。對于介質(zhì)的粒度，要求應(yīng)小于0.1mm，對于大于0.1mm的介質(zhì)，可針對性地對泵的過流結(jié)構(gòu)進(jìn)行改變，以滿足需要。對于介質(zhì)的粘度，一般應(yīng)在0～1000mm/s，特殊的計(jì)量泵可達(dá)6000 mm2/s，機(jī)械隔膜式計(jì)量泵的流量是在標(biāo)定的額定壓力之下測得的最大流量(室溫下清水輸送時(shí))，若壓力下降，則輸出的流量會(huì)比標(biāo)定的高。<br /> </div><div align="center"><img src="https://img61.hbzhan.com/2/20221205/638058509200981680737.jpg" alt="" width="800" 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