This Palmetto style 1382 expanded PTFE and graphite compression packing seal with an inert lubricant protects rotating pumps and valves from fluid leaks in chemical or abrasive slurry applications. The interwoven braided packing seal combines yarns made of expanded polytetrafluoroethylene (ePTFE) and graphite to provide a seal that withstands harsh chemicals and handles high shaft speeds. ePTFE is a strong, flexible material that exhibits the same characteristics as polytetrafluoroethylene (PTFE), such as low friction and resistance to harsh chemicals, but has a more porous, conformable structure that accepts lubricant better and helps reduce leak-off in applications with irregular surfaces and gaps. Graphite yarn transfers heat away from the shaft to prevent glazing and scoring, extending the packing and sleeve life. It handles high temperatures, high shaft speeds, and exhibits a low coefficient of friction for reduced shaft wear. An inert lubricant improves break-in time, reduces frictional heat, and prevents the packing from spinning with the shaft or stem, reducing the chance of wear and extending the packing life.
This packing seal is compatible with media in the pH range of 0-14, except for strong oxidizers in the 0-2 pH range, such as oleum, fluorine, and fuming nitric acid. It has a maximum pressure limit of 1,900 pounds per square inch (psi), and a shaft speed rating of 3,800 feet per minute (fpm). It operates across a wide temperature range from -400 to 550 degrees F (-240 to 288 degrees C). Style 1382 is suitable for applications such as sludge, paper, asphalt pumps, and chemical and mining pumps.
| pH range || 0-14, except strong oxidizers in the 0-2 pH range |
| Pressure limit || 1,900 psi (131 bar)|
| Shaft speed ||3,800 fpm (19.3 m/s)|
| Temperature range || -400 F to 550 degrees F (-240 to 288 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.