The Driers are a very important part of the refrigeration unit (Namely Refrigerator, Deep freezer, water cooler, bottle cooler & other cooling & freezing units). The whole refrigeration system is ineffective if there is any moisture in the unit. The function of drier is to absorb the moisture from the system & keep it free from any moisture. There are various kinds of driers available in different capacities suitable for a specific purpose. The term Pencil Type Drier (PTD) had first been derived by us & now PTD is a synonym for the drier, which was coined by us.