1、气体增压泵选型参数之中，要确定的是增压介质。
1, the selection parameters of gas booster pump, the first thing to determine is the pressurizing medium.
比如，增压介质是空气/氮气，我们就在空气增压泵/氮气增压泵中选。增压介质是气体，我们就在气体增压泵中选；增压介质是液体，我们就在气液增压泵中选。
For example, the pressurizing medium is air / nitrogen. We choose it in the air booster pump / nitrogen booster pump. Supercharging medium is gas, we choose in gas booster pump; Supercharging medium is liquid, we choose in gas-liquid booster pump.
2、根据系统所需压力初步确定气体增压泵的型号。
2, according to the pressure required by the system, initially determine the type of the gas booster pump.
一般地，气体增压泵的驱动气压≤7bar。所以，增压比Ratio=Po/Pa。其中，Po是系统的输出压力；Pa是气动泵的驱动压力，一般取较大值0.7MPa。
Generally, the driving pressure of the gas booster pump is less than 7bar. Therefore, the supercharging ratio is Ratio=Po/Pa. Among them, Po is the output pressure of the system; Pa is the driving pressure of the pneumatic pump, and generally takes the maximum value of 0.7MPa.
3、根据计算出来的增压比，在相应气体增压泵类型中选择型号。
3. According to the calculated supercharging ratio, choose the type in the corresponding gas booster pump type.
注意，通常我们会选择增压比略高于计算值的气体增压泵，以确保我们的气体增压泵在通常情况下都能输出系统所需压力。
Note that we usually choose a gas booster pump with a boost ratio slightly higher than the calculated value to ensure that our gas booster pump can normally output the pressure required by the system.
4、核算气体增压泵的流量是否满足系统要求。
4, check whether the flow of gas booster pump meets the system requirements.
当我们根据气体增压泵的出口压力初步选择了气体增压泵的型号后，我们需要核算改气体增压泵的流量是否满足要求。
When we choose the type of gas booster pump according to the outlet pressure of the gas booster pump, we need to check whether the flow rate of the gas booster pump meets the requirements.
气体增压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，气液增压泵10-4000W003，我们在气液增压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 flow calculation method of the gas booster pump is as follows: the displacement per stroke * the action frequency per minute (generally 40). For example, gas-liquid booster pump 10-4000W003, we found in the gas-liquid booster pump table that its displacement per stroke is 42.50ml, then its flow Q = Q * n = 42.50ml * 40 = 1700ml / min = 1.7L / min. Compare the flow with the flow of the system to see if it meets the requirements.
我们所说的流量都是指常压下的流量，即将1分钟内经过气体增压泵增压的介质（液体或气体）放在常压下去测量它的体积。所以，对于气体，我们需要考虑预增气压的大小。
We refer to the flow rate at atmospheric pressure, that is, the medium (liquid or gas) pressurized by the gas booster pump is put under atmospheric pressure to measure its volume in one minute. So for gas, we need to consider the magnitude of the pre pressure.
5、根据增压介质选择气体增压泵的材质。
5, select the material of the gas booster pump according to the pressurizing medium.
经过上面4个步骤后，我们可以选出气体增压泵的基本型号了。然而，正确的型号还得考虑增压介质对气体增压泵材质的要求。
After the above 4 steps, we can select the basic type of the gas booster pump. However, the correct model must also consider the requirements of the pressurizing medium for the material of the gas booster pump.
