“吸程”也叫“最大自吸高度”(也可以理解为“自吸的程度”)。即微型泵在不加引水的情况下，能自动将水吸上来的最大高度(泵抽水口距离待抽液面的垂直距离)。一般水源低于等于泵的摆放位置时，就需要泵有自吸能力。例如户外旅游时，需要抽取河中的水，最好用带自吸能力的微型水泵（不可能人跑到河里先往进水管加点引水吧）。又或者抽的液体有腐蚀、不方便加引水等等场合。例如：有种水泵，型号叫某某BSP系列，体积并不大，但标称的吸程可以到4米，确实可以不加引水到4米，算微型水泵里比较高的。微型水泵里，不是所有的泵都有自吸能力(“吸程”)的。有些离心式的水泵就没有自吸能力，第一次使用必须加引水才行。有的微型水泵虽然也有自吸能力，但标的“吸程”往往与“进水管里全部是空气”下，能抽起水的垂直高度有差距，甚至可能只有一半不到。所以水泵选型时，吸程是个比较重要的参数。水泵的扬程是指水泵能把水扬高的能力。通常扬程用英文字母H表示，常用单位为米。通俗的讲扬程就是能把水泵到多高， 从水面到泵体为吸程，从泵体至抽水高度为扬程，吸程和扬程之和为总扬程，如果吸程不够扬程再高也是无法泵上水耒.潜水泵除外根据液体压强公式p=gh，估算大气压可压起的水柱高为h=p/g=10m。各类泵的扬程计算是通过流体力学中的伯努方程式来计算的，公式可在流体力学书中查到。一般来说可用简单的方法计算，扬程等于该泵的功率乘102倍的效率再除以流量和该液体的密度计算步骤如下：1、计算管道的比阻S，如果是旧铸铁管或旧钢管，可用舍维列夫公式计算管道比阻s=0.001736/d5.3 其它管用s=10.3n2/d5.33,n为管道内壁糙率；2、计算管道两端的水头差，即管道的沿程水头损失hf=sLQ23、计算泵的扬程：H=hf+kh=sLQ2+kh式中： Q 喷射流量，以m3/s为单位；d管道内径；h喷射高度，以m计； hf管道的沿程水头损失，以m为单位；L管道起端至末端的长度，以 m为单位；k大于1的系数，可取k=1.1（射流在空中因有空气阻力）。WL立式污水泵性能参数表型号流量扬程（m）转速（r/min） 功率（KW）效 率汽蚀余量（m）重量（kg）排出口径/吸入口径m3/hl/s轴功率配用功率100WL80-8-48022.2814402.54711.6250100/150100WL126-5.3-4126355.39602.54731.4250100/150100WL120-8-5.512033.3814403.65.5732.2340100/150100WL100-10-5.510027.81014403.85.5711.8340100/150100WL30-25-5.5308.32514503.55.5602.5340100/150150WL215-4.7-5.521559.7 4.79603.75.5752.0400150/200150WL198-6.1-5.5198556.19604.45.5741.8400150/200150WL280-5.2-7.528077.85.29705.27.5762.4490150/200150WL210-7-7.521058.379705.37.5751.9490150/200150WL145-10-7.514540.31014405.47.5732.4490150/200150WL380-5.4-11380105.65.49707.311773.0960150/200150WL360-6.4-113601006.49708.211762.8960150/200150WL140-14.5-1114038.914514607.711722.2960150/200150WL70-22-117019.42214607.311711.3960150/200150WL170-16.5-1517047.216.5146010.615722.51000150/200150WL210-11.2-1521058.311.297011.515731.71000150/200150WL300-11-1530083.311146011.915764.11000150/200200WL360-7.4-153601007.47309.515751.81012150/200200WL520-6.7-15520144.46.797012.215783.71012150/200150WL190-18-18.519052.818147012.918.5722.7874200/250150WL292-13.3-18.529281.113.3147014.118.5753.9874150/200200WL450-8.4-18.54501258.473013.618.5762.1894200/250100WL80-35-228022.23514701822751.3960100/150150WL250-18-2225069.4189701822761.8980150/200150WL300-16-2230083.316147017.522753.9980150/200150WL414-11.4-2241411511.4147016.822775.3980150/200250WL600-8.4-22600166.78.473017.922772.61100250/300250WL680-6.8-22680188.96.873016.222782.91100250/300150WL262-19.9-3026272.819.99802030711.8940150/200250WL675-10.1-30675187.510.173024.230772.71110250/300250WL725-9.4-30725201.49.474024.830753.01180250/300300WL1000-7.1-301000277.87.173024.630793.91180300/350150WL350-20-3735097.22098026.337732.3980150/200200WL400-17.5-37400111.117.598025.837742.61150200/250200WL480-13-37480133.3139802537763.11150200/250300WL1000-8.5-371000277.88.574029.537783.91200300/350150WL320-26-4532088.826148031.545733.71280150/200200WL500-20.5.45500138.920.598036.845762.91320200/250200WL600-15-45600166.7159803445753.61320200/250250WL750-12-45750208.3127403245772.91350250/300100WL100-70-5510027.770148042.255761.31950100/150250WL800-15-55800222.21598042.255774.52123250/300300WL900-12-559002501274038.155773.32400300/350350WL1500-8-551500416.7898046.755798.32180350/400400WL1750-7.6-551750486.17.698045.555809.42310400/450200WL350-40-7535097.24098054.575702.62210200/250200WL400-30-75400111.1309904675712.42210200/250200WL46-35-75460127.83599059.675742.52210200/250250WL600-25-75600166.72590060.0575743.32240250/300250WL900-18-159002501899057.875774.82240250/300300WL938-15.8-75938260.615.874052.875753.32390300/350350WL1400-12-751400388.91299057.175787.32340350/400400WL2000-7-752000555.6774050.275765.42480400/450300WL1328-15-901328368.9159906990796.72480300/350350WL150-13-901500416.71399069.890787.62480350/400250WL792-27-1107922202799077.6110754.02620250/30