What is the purpose of covering threaded sections with a sleeve during packing ring or seal installation?

Covering threaded sections with a sleeve during the installation of packing rings or seals serves primarily to protect the packing rings or seals from damage. When the threaded parts of a hydraulic or pneumatic component are exposed, they can create sharp edges and points that might cause abrasion or cuts on the soft materials of these seals or packing rings.

Using a sleeve acts as a barrier, shielding the delicate components from these potential hazards during installation or in the operational environment. This protective measure ensures that the integrity of the seals is maintained, allowing them to function effectively without suffering from premature wear or failure due to mechanical damage.

While the other options discuss various benefits, the main function of the sleeve in this context is the protection it provides, which is crucial for the longevity and effectiveness of seals and packing materials in hydraulic and pneumatic systems.