What is the primary purpose of the Dip Tube on some R-410A cylinders?

The primary purpose of the dip tube in R-410A cylinders is to facilitate liquid removal when the cylinder is upright. The dip tube extends from the top of the cylinder and reaches into the liquid refrigerant. This design allows refrigerant in its liquid phase to be withdrawn from the cylinder without allowing the gaseous refrigerant to escape prematurely.

When a cylinder is positioned upright, the liquid refrigerant collects at the bottom, and the dip tube ensures that only this liquid is extracted, creating a direct path for it to flow out while preventing the gas from being pulled out along with the liquid. This is crucial in applications where liquid refrigerant is needed for servicing or charging systems, ensuring the correct state of the refrigerant is maintained during transfer.