While there is no widely known "Kern" brand pressure cooker on the market—as KERN & SOHN

Ensure the Steam Release Valve is turned to the position.

Add at least 1 cup of water and ensure the lid is locked [13, 24]. Steam leaking from valve Valve not set to "Sealing"

Most Kern models will have a variation of these standard buttons:

: Never fill the pot beyond the 2/3 full mark for standard foods, or 1/2 full for foods that foam or expand (like beans, grains, or pasta). Step 2: Sealing and Setting How to Use a Pressure Cooker (Fagor Duo)

Turn off the heat and let the pot sit until the pressure indicator pin drops naturally (usually 15–20 minutes).