This Palmetto style 5080 flexible graphite compression packing seal with carbon-reinforced corners protects pumps and valves from fluid leaks in severe service applications. The interwoven braided seal is made of pure expanded flexible graphite yarn for high shaft speeds, a low coefficient of friction in both low and high temperatures, and resistance to harsh chemicals and high temperatures. Flexible graphite transfers heat away from the shaft or stem to prevent glazing and scoring, reducing leakage and extending the packing and sleeve life. It is resilient and conforms to surfaces when compressed to create a tight seal. The packing corners are reinforced with 95-percent assay carbon yarn to prevent extrusion of the graphite fibers.
This packing seal is compatible with media in the pH range of 0-14, except strong oxidizers in the 0-2 pH range, such as fuming nitric acid, aqua regia, and oleum. It has a shaft speed of 6,000 feet per minute (fpm), and a maximum pressure limit of 1,200 pounds per square inch (psi) in pumps and 3,500 psi in valves. It operates at temperatures from -300 to 1,200 degrees F (-184 to 649 degrees C) in steam and -300 to 650 degrees F (-184 to 343 degrees C) in oxidizing atmospheres. Style 5080 is suitable for use in boiler feed pumps, condensate pumps, and steam valves, among others.
| pH range ||0-14, except strong oxidizers in the 0-2 pH range |
| Pressure limit in pumps || 1,200 psi (83 bar)|
| Pressure limit in valves ||3,500 psi (241 bar)|
| Shaft speed || 6,000 fpm (30.5 m/s)|
| Temperature range in oxidizing atmospheres || -300 to 650 degrees F (-184 to 343 degrees C) |
| Temperature range in steam || -300 to 1,200 degrees F (-184 to 649 degrees C)|
Rope seals provide a pressure seal to help retain fluids and gases in a wide variety of commercial and industrial applications. They have a round, square, or rectangular cross section, and come in various braided designs including braid-over-braid, braid-over-core, laminated, twisted, or interwoven. Rope seals can be manufactured from a single material or a combination of materials that suit specific pressure, temperature, speed, and chemical applications. Some rope seals are impregnated with lubricant and have reinforced cores for improved performance in specific environments, such as extremely high temperatures. They can be used to create a static seal in fixed or slow-moving applications like expansion joints, doors, and valves, or a dynamic seal in equipment with reciprocating, rotating, or oscillating movement like centrifugal pumps, rotating stems, and blowers. Rope seals come in uncut lengths on spools or as precut molded rings. They are used in numerous industries including agriculture, oil and gas, automotive, aerospace, construction, and consumer goods.
Palmetto Inc. manufactures packing products for pumps and valves, such as compression packing seals, packing tools, gasket sheets, and fillers. The company, founded in 1872, is headquartered in Denton, MD.