Rotary evaporator

Commonly known as a rotavap, this machine can purify cannabis concentrates. Using rotation and gentle heat, a rotary evaporator can remove contaminants or further concentrate desired cannabinoids. Rotavaps are frequently used to improve the winterization process. 

“If you want to make a truly high-quality distillate, you need to invest in a good rotavap.” 

What is a rotary evaporator?

A rotary evaporator, also called a rotavap, is a machine that separates residual solvents from cannabis concentrates. Through rotation—which acts as a type of filtration—and gentle warming, a rotavap can either remove unwanted contaminants, or isolate a desired cannabinoid. 

There are seven main components to a rotavap:

  1. An evaporation flask or vial, which holds the sample material
  2. A motor that rotates the flask or vial
  3. A vacuum-sealed vapor pathway, which draws vapor off the sample
  4. A vacuum system, which significantly reduces pressure in the evaporator
  5. A heated fluid bath (usually water), which gently warms the sample
  6. A condenser or “cold finger,” which can be filled with dry ice or other coolants to make vapor recondense
  7. Another flask to collect condensed vapor after distillation

In the cannabis industry, rotavaps are commonly used during the winterization process, to purge waxes and lipids from a cannabis extract at a low temperature. Beyond winterization, rotavaps have other applications: A rotavap can turn raw cannabis flower into high-grade THCA isolate diamonds, and if calibrated differently, a rotavap can be used to make oils and tinctures.

Stay In Touch

Receive updates on new products, special offers, and industry news.

By providing us with your email address, you agree to Leafly's Terms of Service and Privacy Policy.

Leafly mobile app
Get high for less.
Download the Leafly app.
Download Leafly: Marijuana Reviews on the App Store
Download Leafly Marijuana Reviews on Google Play

The material provided on Leafly is intended for educational and informational purposes only. Leafly is not engaged in rendering medical service or advice and the information provided is not a substitute for a professional medical opinion. If you have a medical problem, please contact a qualified health professional.

© 2024 Leafly, LLC
Leafly and the Leafly logo are registered trademarks of Leafly, LLC. All Rights Reserved.