An incorrectly selected vacuum pump either fails to achieve the vacuum required by the process or consumes unnecessary energy due to being oversized. For the correct selection, the following five criteria must be evaluated together.
1. Flow Rate (Suction Capacity)
This is the volume of air the pump can evacuate per unit time, expressed in m³/h. The volume to be evacuated and the desired evacuation time determine the required flow rate. In applications with continuous air leakage (such as CNC tables), the leakage rate must also be taken into account.
2. Required Vacuum Level
Ultimate vacuum is the lowest pressure the pump can achieve (mbar). Applications such as packaging, drying, and thermoforming each have different vacuum requirements; the ultimate vacuum of the pump must be lower than the process requirement.
3. Process Type: Lubricated or Dry?
Oil-recirculating pumps offer high vacuum and long service life. In food, pharmaceutical, or cleanroom applications where oil vapor is undesirable, dry-type pumps are preferred.
4. Operating Time and Environmental Conditions
The daily operating hours of the pump, ambient temperature, and the composition of the pumped gas (moisture, dust, vapor) directly affect the selection. If necessary, an inlet filter or separator should be added.
5. Maintenance and Spare Parts Availability
Quick access to consumables such as filters, oil, and vanes minimizes downtime. Access to spare parts and service support is much easier with domestically manufactured pumps.
If you are not sure which model is suitable for your application, you can request a quote from our engineering team along with your process details.
