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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p>●密集成套型罗茨风机<br/>　 JAS系列三叶成组型低噪声罗茨鼓风机是在引进技术产品基础上，运用三叶、内回流、成组等国际**技术研发的新一代低能耗、低噪声产品。它集风机、电机、过滤器、进出口消声器、弹性接头、安全阀、止回阀、压力计于一体，并可配置PLC信号接口，智能监控仪、隔声罩。结构紧凑、功能齐全、设计安装更便利，操作维护更省心、�/p><p>　　 JAS系列三叶成组型低噪声罗茨鼓风机采用三叶摆线叶型、内回流结构等先进设计技术和高精度制造技术，在高压力上具有非常稳定的性能，应用范围十分广泛，可派生多种密封结构型式，满足各种特殊工况的要求，是广大用户在49�?8kPa下的**产品、�br/>　　**一代高效低噪型三叶叶型� <br/>结构紧凑、配置齐全、安装维护方便� <br/>具有多种密封结构形式，可输送各种特殊介质，满足不同工业种类的需要、�/p><p>� 流量范围</p><p>　流量�?.63�?60m3/min 升压�?.8�?8kPa</p><p>� 性能表说昍�/p><p>　　 流量：性能表中流量Qs是指标准吸气状态（**压力101.325kPa、温�?0℃、相对湿�?0%），介质为空气时罗茨鼓风机的进口流量，对于输送其它介质或非标准状态下的流量段进行换算� <br/>流量换算：当进气流量用基准状态（温度0℃，**压力101.325kPa）下的流量Qn表示时，需先按下式换算成标准吸气状态下的流量Qs后，再查性能表（通常不考虑湿度）� <br/>Qs=1.0733Qn <br/>当进气温度ts�?0℃相差较大，或者吸入气体分子量M显著地偏离空气分子量29时，实际进气流量Qs按下式计算： <br/>Qb=(Qth-Qsa)×[(273+ts)/(273+20)×29/M] 1/2 <br/>Qs=Qth-Qb <br/>式中：Qb—吸入气体温度为ts℃，分子量为M时的内泄漏量m3/min� <br/>Qth—理论流量m3/min；（根据要求升压下的进口流量，按性能表初步选型后由性能表查得）� <br/>Qsa—标准吸入状态下的实际m3/min流量。（初步选型后性能表所示的流量� <br/>压力单位换算�?.8kPa=0.1kgf/cm2=1000mmH2O=73.5mmHg=98mbar=0.0967atm <br/>表列性能参数以空气为介质，如输送其它介质或进气状态与标准进气状态不符时，流量需进行相应的换算、�/p><p>� 性能表使用说昍�br/>Qs系指在各种进口真空度下，温度�?0℃时的进口气体流量� <br/>性能表参数以空气为介质，如输送其它介质或进气状态与规定进气状态不符时，实际流量需进行相应的换算� <br/>性能表中△符号所示转速表示直联传动，*符号表示可直联也可带联传动，其它均为皮带传动� <br/>电动机防护等级如无特别说明，一般选用IP44� <br/>� 选型订货须知 <br/>样本性能表参数基于确定的进气状态和排气状态，真空泵选型时，请注明输送介质、进气状态、进口流量、排气压力及环境条件� <br/>特殊使用要求如防腐防爆、安装布置、密封、调节、控制方式等等请在订货前说明、�br/></p><p></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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