Laboratory Vacuum Pumps: The Ultimate FAQ Guide!



What is a Laboratory Diaphragm Vacuum Pump?

Diaphragm vacuum pumps are one of the ideal pump designs for creating vacuum conditions in the laboratory. Because they avoid the need for pump oil, diaphragm pumps have higher corrosion resistance and generally require less service support than oil-sealed pumps.


What Are the Characteristics of Laboratory Diaphragm Vacuum Pumps?

Operators working in laboratory environments often choose diaphragm vacuum pumps for applications where chemical resistance is important. The ultimate vacuum of diaphragm pumps can be as low as 0.3 Torr, which is sufficient for most pumping and evaporation applications in the laboratory.

The chemically resistant PTFE pump head ensures a long service life, enabling these diaphragm pumps to service corrosion-prone rotary evaporators or evacuate flasks and bottles, all without contaminated aspirator water.


What Are the Applications of Laboratory Diaphragm Vacuum Pumps?

Vacuum pumps are a versatile piece of laboratory equipment for suctioning via negative pressure. They are routinely used in biological sciences for filtration, distillation, and concentration of volatile solvents, solid-phase extraction, freeze-drying, and more. 


What is the Principle of Laboratory Diaphragm Vacuum Pump?

The Diaphragm Pump Working Principle is as simple as two valves opening and closing using air pressure to force a piston back and forth, or as complicated as delicately balanced vanes that are revolved by the air. The use of an air motor on this type of pump allows it to be used in more than one application.


How to Choose a Laboratory Diaphragm Vacuum Pump

After deciding what kind of pump you need, there are usually a few makes and models to choose from. The relationship between Max vacuum and Max flow rate is the most important for determining pump performance. As the vacuum increases, the flow rate approaches a maximum value. Balancing these two factors to suit your lab needs can minimize sample loss from bumping or over evaporation and maximize the evaporative speed.

  • Max vacuum (mbar) - also called “ultimate vacuum”, this is the lowest pressure level that the vacuum can pull. A pump with a max vacuum of 0.1 mbar can evaporate gases with a vapor pressure greater than 0.1 mbar at room temperature.
  • Max flow rate (lpm) - also called “pumping speed”, this is the highest rate that the vacuum can evacuate vapors. A pump with a max flow rate of 10 lpm can potentially pump 10 liters (or 10 cubic meters) of vapors per minute at atmospheric pressure.


How Do I Know What Size Laboratory Vacuum Pump I Need?


The Best Laboratory Diaphragm Vacuum Pumps of 2022


Final Considerations

Interested in learning more about other types of diaphragm vacuum pumps?

Visit our official website: or check out our catalog of laboratory vacuum pumps!

If you want to buy a cost-effective laboratory vacuum pump then you can get in touch with us. We are a professional diaphragm vacuum pump manufacturer. Can provide you with the most professional services and products. Welcome to consult!


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