一、气体增压泵是气体，我们就在气体增压器中选；增压介质是液体，我们就在气动液体增压泵中选。
First, the gas booster pump is gas, we will choose in the gas supercharger; booster medium is liquid, we will choose in the pneumatic liquid booster pump.
二、根据系统所需压力初步确定泵的型号。根据计算出来的增压比，在相应类型的泵表中选择型号。注意，通常我们会选择增压比略高于计算值的泵，以确保我们的泵在通常情况下都能输出系统所需压力。
Two, according to the required pressure of the system to determine the pump type. According to the calculated booster ratio, choose the type in the corresponding type of pump table. Note that we usually choose slightly higher than the calculated value of the booster pump, the pump to ensure that we can output the required pressure system under normal conditions.

三、核算泵的流量是否满足系统要求。当我们根据泵的出口压力初步选择了泵的型号后，我们需要核算改泵的流量是否满足要求。
Three. Check whether the flow of the pump meets the requirements of the system. When we select the pump model according to the outlet pressure of the pump, we need to calculate whether the flow of the pump meets the requirements.
泵的流量计算方法是这样的：每冲程的排量×每分钟的动作频率（一般以40计）。比如，气动液体增压泵10-4000W003，我们在泵表中查到它每冲程的排量是42.50ml，那么它的流量Q=q×n=42.50ml×40=1700ml/min=1.7L/min。将这个流量与系统需要的流量比较，看是否满足要求。
The method of calculating the flow of a pump is this: the displacement per stroke is equal to the action frequency per minute (usually 40). For example, pneumatic liquid booster pump 10-4000W003, we find in the pump table that its displacement per stroke is 42.50ml, then its flow rate Q=q x n=42.50ml x 40=1700ml/min=1.7L/min. Compare the flow with the flow needed by the system to see if it meets the requirements.
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