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What to Know When Buying a Vacuum Pump

Learn readers’ most common service and repair methods and more from our latest results.

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Vacuum pumps are an essential piece of equipment and are used in a wide variety of processes in most laboratories. Over the past 25 years, it has become apparent that vendors have made significant innovative improvements to vacuum pumps, with important developments in high vacuum technology, corrosion resistance, vacuum control, and improvements in the efficiency and ecological impact of vacuum pumps.

Top 6 Questions You Should Ask When Buying a Vacuum Pump

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. Should you invest in vacuum control? Electronics can improve reproducibility, protect samples, and shorten process times when specific vacuum conditions need to be maintained.
  6. 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 pump used by survey respondents:

Oil-sealed direct drive pump 51%
Oil-free diaphragm pump 44%
Central vacuum to bench turrets 24%
Oil-sealed belt-drive pump 22%
Water jet aspirator vacuum 19%
Compressed air systems 19%
Oil-free scroll pump 10%
Other 9%

Vacuum pump applications as reported by survey respondents:

Vacuum or pressure filtration 63%
Degassing 34%
Rotary evaporator 29%
Mass spectrometry 26%
Freeze drying 24%
Vacuum oven 23%
Liquid aspiration 16%
Gel dryer 6%
Other 20%

Nearly 51% of respondents are engaged in purchasing a new vacuum pump. The reasons for these purchases are as follows:

Replacement of aging pump
56%
Addition to existing systems, increase capacity
19%
Setting up a new lab
11%
First time purchase of a pump
5%
Other
9%

Top 10 Features/Factors Respondents Look for When Purchasing a Vacuum Pump:

Durability of product 90%
Leak tightness 72%
Ease of use 71%
High suction 62%
Value for price paid 62%
Oil-free/Contamination-free pumping 59%
High pumping speed 50%
On-site maintenance/cleaning 50%
Service and support 46%
Safety and health features 46%

For more information on vacuum pumps, including useful articles and a list of manufacturers, visit www.labmanager.com/vacuum-pumps

See survey results from previous years

Categories: Surveys

Published In

Moving to the Cloud

Published: May 12, 2017

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