For diagrams and images, please download the PDF document.


A special lid has been developed at James Heal to improve safety when opening a highly pressurised pot, which occurs when testing at high temperatures. This lid should be selected when testing at temperatures ≥60°C.


To use the high temperature lids:

  1. Tighten the valve using the pot lid spanner before testing, and release afterwards.
  2. After testing, cool the pot briefly in water if required.
  3. Lock into the jig supplied for secure handling.
  4. Release the valve.
  5. Remove the lid safely using the pot lid spanner supplied.
  6. Wearing gloves is recommended.