A.P. Services Graphite Pressure Seal Rings Features Improved Sealing - The Flexible Graphite's ability to "flow" provides significantly better sealing. This can be especially true in valves where the sealing surfaces are rough or where large clearance tolerances exist between the body and bonnet joint. Thermal/Pressure Stability - The thermal stability of the A.P. Services Graphite pressure seal ring will withstand the frequent cycling that occurs in fossil and nuclear stations. Low Cost - Cost of the A.P. Services graphite pressure seals are typically 40% to 80% less than metallic plated rings Quick Delivery - Expedited delivery of A.P. Services Graphite Pressure Seals can be made in two days once tooling is available for a particular size. Initial orders take approximately two weeks to allow for die manufacture. "Contained" Design - The A.P. Services Graphite Pressure Seal design uses thin metal containment "caps" to prevent graphite extrusion. This reduces the need to modify valves or install metal spacers to reduce clearances with the exception of extreme cases. Nuclear Grade - The A.P. Services Graphite Pressure Seal is manufactured under stringent QA controls. The flexible graphite can be certified to meet current GE chemical specifications. Back to Previous Page