# Catalytic Block Assembly An inverted hemispherical cavity placed on top. of and in space relationship to the "**Quenching Disc**" insures total gas-combustion by recycling any "escaped" or "unused" burnable gases back into the gas-flame for **Gas-Ignition**
... preventing **Gas-Oxide** formation, as illustrated in Figure (2-8) as to Figure (2-4).
Figure (2-8) [](https://stanslegacy.com/uploads/images/gallery/2023-12/nddlk062DoN28dzM-image-1702961669650-54-27.png) | Figure (2-4) [](https://stanslegacy.com/uploads/images/gallery/2023-12/gJ9Hcx4XBjg8qG8a-image-1702961662717-54-20.png) |