Combination packings continue to be standard specification for many valve stem sealing applications. Now thanks to James Walker, the performance envelope of combination packings has been drastically improved.
In James Walker's new Supagraf PremiPak, two of the company's class-leading fugitive emission control products come together to provide a combination packing that conforms to the Shell material specification MESC SPE 85/203 and 85/204.
PremiPak combination sets comprise of a top and bottom ring in Supagraf Premier braided material with three intermediate rings in moulded Supagraf LF graphite.
Supagraf Premier is a best available technique (BAT) product for reducing fugitive emissions in line with the European Union's IPPC Directive. The product is third-party verified to TA Luft standards for VOC emissions control and emerged top of its class in independent tests run on behalf of CAPI Group (Akzo Nobel, Shell, Dow and DSM).
Moulded Supagraf Rings represent a major enhancement of the operational capabilities of graphite sealing rings, providing outstanding sealing performance over long adjustment free periods with excellent chemical resistance low friction and high heat transfer.
James Walker Supagraf PremiPak combination sets are available as pre-formed endless or split rings.
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James Walker Sealing Products & Services, is based in Woking, Surrey, UK. www.jameswalker.biz
