<p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font style="BACKGROUND-COLOR: #eeeeee;">泵的典型流程中:</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font style="BACKGROUND-COLOR: #eeeeee;">1.容积式泵通常不设止回阀(</font><font color="#000000" size="2">在容积式泵(如往复式泵)入口通常有内装的止回阀,因而不需要在管道上另设止回阀来防止流体倒流。)</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font style="BACKGROUND-COLOR: #eeeeee;">2.每台离心泵或旋涡泵在泵出口与切断阀之间应设置止回阀,直径与切断阀相同;</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"></span><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font style="BACKGROUND-COLOR: #eeeeee;">3.泵出口管线为多分支时,宜在泵出口总管上设置止回阀;</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font color="#000000">4.并联的泵应在每台泵出口分别装止回阀;</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"></span><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font style="BACKGROUND-COLOR: #eeeeee;">5.对进出口压差大于4MPa的离心泵,每台泵可设置串联的双止回阀。</font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><font color="#ee3d11" style="BACKGROUND-COLOR: #eeeeee;"></font></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><br/><strong>泵出口止回阀设置的原则<br/></strong> <strong>以下几种情况需设置止回阀<br/></strong> (1) 泵自身结构上不允许反转的泵。<br/> (2) 扬程≥25m的离心泵。<br/> (3) 工艺上不允许介质倒流回泵吸入侧的泵。<br/> <strong>以下几种情况可不设止回阀</strong></span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"> (1) 对介质含有固体颗粒、易结晶的输送泵。<br/> (2) 吸入侧设有底阀的泵。<br/> (3) 泵自身对反转无限制,且扬程<25m的离心泵。<br/> (4) 泵转动部分设具有飞轮效应部件,如加大大联轴器、有飞轮部件等。</span></p><p><span twffan="done" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"><strong><font style="BACKGROUND-COLOR: #eeeeee;"></font></strong></span></p>
[此贴子已经被作者于2007-5-23 22:53:17编辑过]
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