立式管道离心泵的安装
立式管道离心泵的安装技术关键在于确定离心泵安装高度即吸程。这个高度是指水源水面到立式管道离心泵叶轮中心线的垂直距离，它与允许吸上真空高度不能混为一谈，水泵产品说明书或铭牌上标示的允许吸上真空高度是指水泵进水口断面上的真空值，而且是在1标准大气压下、水温20℃情况下，进行试验而测定得的。它并没有考虑吸水管道配套以后的水流状况。而水泵安装高度应该是允许吸上真空高度扣除了吸水管道损失扬程以后，所剩下的那部分数值，它要克服实际地形吸水高度。水泵安装高度不能超过计算值，否则，离心泵将会抽不上水来。另外，影响计算值的大小是吸水管道的阻力损失扬程，因此，宜采用短的管路布置，并尽量少装弯头等配件，也可考虑适当配大一些口径的立式管道离心泵水管，以减管内流速(图\文www.wxjpby.com/)。
中译英：
Vertical pipeline centrifugal pump installation technology is the key to determine the suction centrifugal pump installation height. This highly refers to the water surface to the vertical pipeline centrifugal pump impeller centerline vertical distance, and it allows suction vacuum height can not be confused, pump product brochures or nameplate marking allows suction vacuum height refers to the value of the vacuum on the water inlet of the water pump section, and in1 standard atmospheric pressure, water temperature 20℃condition next, the test and measurement. It does not take into account the suction pipe supporting later flow condition. And the pump mounting height should be allowed to deduct the suction vacuum suction piping loss of lift, the remaining portion of numerical value, it is to overcome the real terrain suction height. Pump mounting height should not exceed the calculated value, otherwise, centrifugal pump will be pumped to not Sheung shui. In addition, affect the calculation value is the size of the suction piping resistance loss of lift, therefore, should adopt the most short circuit arrangement, and minimize the loaded elbow parts, may also be considered appropriate with a larger caliber vertical pipeline centrifugal pump water pipe, to reduce the flow velocity in the tube.
