Lidstrom Lab French Press
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French Press
Collect your equipment:
- 1- Cell cylinder
- 2- Screw valve
- 3- Piston
- 4- Cylinder cap
- 5- Spigot
Prepare the equipment:
- Check the condition of the O-rings on the piston and cylinder bottom before starting your extraction
- - If they are shredded, sticky or warped you should change them
- - There are 2 types of O-ring, flat and rounded; the rounded O-ring should be positioned on the outside
- Check the condition of the nylon ball housed in the screw valve
- - The ball must be rounded to effectively adjust pressure
- - Flattened or squared off balls should be changed out
- - Use a razor blade to pry the malformed ball out of the housing and place a new ball in the opening
- Refridgerate setup at 4°C until thoroughly cold
You must have someone show you how to operate the press itself if you have never used it, but here is an overview of the press controls:
- 1- Pressure gauge
- 2- Pressure dial (increase/decrease psi)
- 3- Ratio selector (up/down)