High pressure graphite seal
A.W. Chesterton Company
Chesterton 5900 Graphite High Pressure Bonnet Seals offer end users in the power industry improved reliability and leak tightness of pressure seal bonnet joints. These Graphite High Pressure Bonnet Seals are applicable for use on valves with screwed and bolted bonnets in steam and water. 5900 High Pressure Bonnet Seals are also available with metal end caps.








