AP Services, a product and service brand of Curtiss-Wright, manufactures valve and pump packing products that have the lowest leak rates and friction in the industry. Style 525 is manufactured from high strength, pure graphite filament yarns, in a lattice braid construction. Each yarn is treated with a proprietary coating to elevate the gland load capabilities in high pressure valve applications. Because of the unique characteristics of graphite yarn, no external lubrication is required.
Style 525 is chemically inert and will withstand temperatures as high as 1000 ºF (steam to 1200 ºF). It’s low co-efficient of friction reduces shaft wear, while a low co-efficient of expansion allows for fine gland adjustment reducing leakage to a minimum. These properties combined with good thermal conductivity make Style 525 the perfect packing for severe service applications in both pumps and valves.
Style 525 is suitable for a wide range of acids, caustics, alkalies, steam, and oil applications. Style 525 is braided at AP Services to exact tolerances and uniform density, and is available as individual rings, combination 525/6300J packing sets, and in bulk.
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