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How to Open & Close

A simple photo guide to safely opening and closing your ONS pressure cooker.

How to Open

Opening your ONS pressure cooker is a simple sequence. Hold the body firmly, swing the lid handle until it aligns with the body handle to release the lock, then lift the lid clear of the rim. Follow the numbered steps below.

Step 1: hold the body handle and lid handle together in the closed position 1
Hold the body and lid handles together in the closed position.
Step 2: swing the lid handle toward the body handle to begin releasing the lock 2
Swing the lid handle toward the body handle to begin releasing the lock.
Step 3: keep rotating the lid handle until the lock disengages 3
Keep rotating the lid handle until the locking loop disengages.
Step 4: the handles are aligned and the lid is now unlocked 4
The handles align and the lid is now unlocked.
Step 5: grip the lid knob and lift the lid clear of the rim 5
Grip the lid knob and lift the lid clear of the rim.

How to Close

Practice opening and closing your ONS pressure cooker several times before your first use so the motion becomes familiar. To close, lower the lid into the body, centralize it on the rim, then rotate the lid handle back until it latches over the body handle.

The correct way to open and close

Correct way to open and close — Wrong/Right and Difficult/Easy comparisons
Reference: the WRONG vs RIGHT lid tilt, and the DIFFICULT vs EASY way to squeeze the handles.

Tips to make closing and opening easier

  1. While closing and opening, do not tilt the lid deeply into the cooker body. The minimum tilt that gets the lid into and out of the cooker body should be used so the lid does not touch the food inside.
  2. Before latching the handles together, centralize the lid so that the sealing ring is in even contact with the rim of the cooker body.
  3. When opening after releasing the locking loop, do not let go of the lid handle or the lid will fall into the cooker.
  4. Squeeze the lid and body handles together at the end away from the cooker body — this requires the least force.

Lowering and latching the lid

Lower the lid into the cooker body with a minimal tilt
Lower the lid into the body using the minimum tilt needed to clear the rim.
Centralize the lid so the sealing ring meets the rim evenly
Centralize the lid so the sealing ring sits evenly on the rim.
Squeeze the lid and body handles together to lock the lid
Squeeze the handles together at the far end to latch and lock the lid.