Top 6 Questions You Should Ask When Buying a Vacuum Pump
- What will you be using the vacuum for? Filtration needs modest vacuum. Evaporation requires deeper vacuum. Molecular distillation requires even more. Match the pump to the use.
- Can you use a dry (oil-free) vacuum pump? Oil-free vacuum pumps can support most lab applications. For the service advantages, choose a dry pump where possible.
- What is the pumping capacity at the intended vacuum level? Actual pumping speed declines from the nominal speed as depth of vacuum increases. The rate of decline differs among pumps.
- Do you work with corrosive media? Standard duty pumps have lower purchase costs, but corrosion-resistant pumps will have lower lifetime costs if working with corrosives.
- Should you invest in vacuum control? Electronics can improve reproducibility, protect samples and shorten process times when specific vacuum conditions need to be maintained.
- What is the lifetime cost of operation? Include purchase cost, service intervals, servicing cost, pump protection (e.g., filters, cold traps), and staff time for operation.
Types of vacuum pumps used by survey respondents:
|Oil-sealed direct drive pump ||31% |
|Oil-free diaphragm pump ||19% |
|Oil-sealed belt-drive pump ||13% |
|Central vacuum to bench turrets ||11% |
|Compressed air systems ||9% |
|Water jet aspirator vacuum ||7% |
|Oil-free scroll pump ||5% |
|Other ||4% |
Type of vacuum control used by survey respondents:
|No control - just turn the pump on ||37% |
|Manual adjustment of knob ||20% |
|Electronic control on the vacuum application ||17% |
|Central vacuum - on/off control ||13% |
|Electronic control on pump ||12% |
|Other ||1% |
Nearly 22% of respondents plan on purchasing a new vacuum pump in the next year. The reasons for these purchases are as follows:
| ||Addition to existing systems, increase capacity || |
| ||Setting up a new lab |
| ||Replacement of aging pump |
| ||First time purchase of a pump |
| ||Other |
Top 10 features/factors respondents look for when purchasing a vacuum pump:
|Durability of product ||92% |
|Ease of Use ||77% |
|Leak tightness ||74% |
|Value for price paid ||69% |
|Oil-free/Contamination free pumping ||58% |
|Maintenance costs ||58% |
|High suction ||53% |
|Availability of supplies and accessories ||53% |
|On-site maintenance/cleaning ||51% |
|Low noise level ||48% |
Completed Surveys: 220
For more information on vacuum pumps, including useful articles and a list of manufacturers, visit www.labmanager.com/vacuum-pumps
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