选择阀门的方法...

hao

呵呵

<p>长见识。</p>

理解中！

这个要顶!

学习了！！

学习了

学习

获益匪浅 谢谢

<p>这个问题比较理论，要做好，不是非常容易</p>

<p>谢谢各位的讲解，让我们长知识了！</p>

学习中哦

<div class="quote"><b>以下是引用<i>lijinlin</i>在2009-3-19 21:45:00的发言：</b><br/>
<p><font face="Verdana">CV=G/&nbsp;( ΔP开方)</font></p>
<p>其中,G的单位要换算成GPM(加仑/分钟),ΔP的单位要换算成PSI.</p>
<p>KVS=<font face="Verdana">CV</font>/1.17</p>
<p>注:流量值G,ΔP可以从设计单位获得,如果缺少ΔP,根据美国空调协会公布的经验数值 ΔP 一般在5~7 PSI,</p>
<p>&nbsp;&nbsp;&nbsp; 为便于计算一般取6.25PSI,这样开方后是2.5,因此CV的计算公式可简化为如下:</p>
<p><font face="Verdana">CV=G/&nbsp;2.5,</font></p>
<p>&nbsp;</p>
<p>计算出CV/KVS,就可以根据阀体的CV/KVS进行选择了.</p>
<p>个人经验这种算法经得起实践的检验,</p>
<p>如下常用单位换算供参考:</p>
<p>
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<tbody>
<tr style="HEIGHT: 18pt; mso-height-source: userset" height="24">
<td class="xl25" style="WIDTH: 118pt; HEIGHT: 18pt" width="157" colspan="3" height="24">1 LPM=3.785GPM</td>
<td class="xl25" style="WIDTH: 108pt; mso-ignore: colspan" width="143" colspan="3" x:str="GPM=CMH*4.4     ">GPM=CMH*4.4<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></td>
<td class="xl27" style="WIDTH: 85pt" width="113" colspan="2">1PSI=6.895 Kpa</td>
<td class="xl22" style="WIDTH: 50pt" width="67"></td>
<td class="xl26" style="WIDTH: 91pt; mso-ignore: colspan" width="121" colspan="2">LPM=L/S*60</td></tr>
<tr style="HEIGHT: 18pt; mso-height-source: userset" height="24">
<td style="WIDTH: 118pt; HEIGHT: 18pt" valign="top" align="left" width="157" colspan="3" height="24"><?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shape id="_x0000_s8916" style="MARGIN-TOP: 3.75pt; Z-INDEX: 7279; MARGIN-LEFT: 44.25pt; WIDTH: 25.5pt; POSITION: absolute; HEIGHT: 9pt; rotation: -415511fd" coordsize="32,18" path="m,14hdc2,3,5,14,6,18,8,12,9,6,10,v7,1,15,3,22,3hae" filled="f" fillcolor="white [9]" strokecolor="windowText [64]" o:insetmode="auto"><v:path arrowok="t"></v:path></v:shape><span style="mso-ignore: vglayout2">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td class="xl25" style="WIDTH: 118pt; HEIGHT: 18pt" width="157" colspan="3" height="24"></td></tr></tbody></table></span></td>
<td class="xl25" style="mso-ignore: colspan" colspan="3">LPM=100/6*M3/H</td>
<td class="xl27" colspan="2"><span style="mso-spacerun: yes">&nbsp;</span>1Kv=1Cv/1.17</td>
<td class="xl24"></td>
<td class="xl26" style="mso-ignore: colspan" colspan="2">
<p>1RT=2.4GPM(冰水)</p></td></tr></tbody></table></p>如有需要可联系我:QQ:27590292 </div>
<p>我上学的时候，老师讲过，好像就是这个，当初没好好学，现在补上。谢谢</p>

好东西。高人真不少

用胶布再用口咬住

用胶布再用口咬住

<p>好贴！</p>

kvs=CEILING(水流量/SQRT(水压降/100),0.1)<br/>一般空调二通阀的kvs计算公式<br/>

水流量单位是立方米每小时 水压降单位是千帕

太感谢了。。。学习了，。。正差这个呢