Start from the real process requirement 先确认真实工况
Packaging machines may use vacuum for bag forming, sealing, pick-and-place, degassing or holding. The pump should be selected from the actual vacuum task, not only from the machine size. 包装机械可能用于成袋、封口、取放、脱气或吸附固定。选泵时应从真实真空任务出发，而不是只看设备外形大小。
Before quotation, prepare chamber volume, required pump-down time, target pressure, operating hours and the product being packed. 报价前建议准备真空容积、目标抽气时间、目标压力、每天工作时长和包装物料信息。
Check the pump type and maintenance habit 确认泵型和维护习惯
Oil-sealed rotary vane pumps are common for industrial packaging lines because they offer stable supply, spare parts support and straightforward maintenance. 油封旋片泵常用于工业包装线，优势是供应稳定、备件容易匹配、维护方式清晰。
For dry or oil-free requirements, confirm whether the process allows oil vapor, dust, water vapor or frequent start-stop operation. 如果客户要求干式或无油方案，需要进一步确认工艺是否有油雾限制、粉尘、水汽或频繁启停。
Information to send before quotation 询价前建议提供的信息
Send the old pump model if this is a replacement project. Also include voltage, frequency, quantity, destination country and any space limitation around the machine. 如果是替换项目，请尽量提供旧泵型号。同时提供电压、频率、数量、目的国家和设备安装空间限制。
If the pump size is uncertain, use the sizing calculator first and send the result for engineer review. 如果不确定抽速范围，可以先使用选型计算器，再把结果发给我们复核。