6" Hemi Base Lid With 4 1/4" F-NPT Ports

These lids are often designed for systems that involve closed-loop extraction, solvent-based extraction, or distillation. The Hemi Base Lids are likely used as part of the chamber or container in the extraction process. They help ensure the integrity and safety of the system by providing an airtight seal during the extraction, preventing leaks, and maintaining proper pressure and temperature conditions.

In particular, these lids may have a hemispherical shape (hence the "Hemi" name) which is advantageous in terms of:

1. Pressure Distribution: A curved, dome-like shape can evenly distribute pressure within the system, reducing the likelihood of material failure or leaks.
2. Efficient Collection: In some systems, the lid design helps funnel vapors or oils that condense, helping with more effective collection during the extraction process.