459 Graphite Manway Gasket

Chesterton 459 is a live-load, graphite-filled manway gasket engineered for reliable, long-term sealing in demanding industrial conditions. Designed for easy installation and consistent flange pressure, it delivers strong compliance to flange surface imperfections and maintains sealing integrity by resisting creep relaxation over extended service periods. This dependable performance helps reduce maintenance needs, improve safety, and support more predictable operation across a wide range of process conditions.

Ideal for heavy-duty applications such as petrochemical facilities, power generation plants, pulp and paper mills, and general industrial operations, the 459 gasket is built to withstand high temperatures, high pressures, and exposure to aggressive chemicals. Its graphite-based construction provides excellent thermal stability and consistent sealing, even during wide temperature swings, repeated thermal cycling, or harsh operating environments where reliability is essential. By offering durable, long-lasting performance, Chesterton 459 helps improve equipment reliability, reduce unplanned downtime, and support safer, more efficient plant operation overall.