Selecting the right gland packing is vital for reliable sealing in industrial pumps and valves, requiring materials matched directly to operating conditions. Temperature and media compatibility guide material choice: PTFE suits chemical environments, graphite handles high temperatures, and aramid resists heat and abrasion across water, steam, and slurries. Furthermore, system pressure and shaft speed dictate packing strength and friction resistance. Application needs also differ, as pump packing allows controlled leakage for lubrication, while valve packing prioritizes high-pressure stability and minimal leakage. Proper ring sizing, cutting, staggering, and monitoring prevent common installation errors. Explore the complete guide to make informed sealing decisions.