Compression Packing Seal Power Generation For Use In - Packing Seals Pumps Valves Square (in) 5/16 in Length 10 ft Graphite Filament with Graphite Lubrication - Packing Seals Yes Max Pressure for Pumps (PSI) 500 psi Max Pressure for Valves (PSI) 3 500 psi Dull Gray Color Ambient Temp Range (F) -450 to 800 Max Temp in Steam (F) 1200 Max Shaft Speed (ft/min) 4 000 fpm pH Range 3 to 14 Features High Temperature Packing with a Special Solid Lubricant That Prevents Wicking