# Vacuum Pumps

**URL:** <https://network.greenyourlab.org/t/vacuum-pumps/48>\
**Category:** Energy\
**Created:** [April 24, 2021, 7:00am UTC](https://network.greenyourlab.org/t/vacuum-pumps/48 "2021-04-24T07:00:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![GreenYourLab](https://yyz2.discourse-cdn.com/free1/user_avatar/network.greenyourlab.org/greenyourlab/32/517_2.png) [@GreenYourLab](https://network.greenyourlab.org/u/GreenYourLab)\
**Post date:** [April 24, 2021, 7:00am UTC](https://network.greenyourlab.org/t/vacuum-pumps/48/1 "2021-04-24T07:00:00Z")

</div>

# Oil-Free Alternatives

Replace oil-sealed vacuum pumps and water jet aspirators with oil-free screw and diaphragm pumps

Consider using **screw pumps** , which are low-maintenance and do not require oil. They use two contact-free spindles for gas transport in gap-sealed chambers. **Diaphragm pumps** are another oil-free solution that create a vacuum using inlet and discharge valves that work together with a flexible diaphragm. Also, consider using pumps with an exhaust vapor condenser, which can condense and collect waste vapors at the pump’s outlet, facilitating solvent recovery and recycling.

## Energy Efficiency

To reduce energy usage, consider using demand-responsive pumps and local vacuum networks. Demand-responsive pumps with a speed-controlled motor can decrease energy usage at a single workstation by up to 90 percent compared to a vacuum pump with constant motor speed. Local vacuum networks, which are more energy-efficient than central vacuum networks, can reduce energy consumption by 70-90 percent and support multiple users from a single pump.

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