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Chesterton 5900 Graphite Valve Bonnet Seal

This high-pressure graphite bonnet seal is applicable for use on valves with screwed and bolted bonnets in steam and water. The Chesterton 5900 offers improved reliability and leak tightness of pressure seal bonnet joints. Available with metal end caps.

Product Features

•Conforms easily to the valve’s body and bonnet

•Maintains excellent anti-extrusion properties

•Requires significantly lower pressure to seal than traditional metal bonnet seals

•Can handle minor scores and pitting to sealing surface, thus reducing maintenance costs

•Enables easy removal without damage to the valve body

Application