API 6A Gate Valve Stem Packing uses live-loading to compensate for thermal expansion and wear. Multi-layer stacks include live rings, pressure cups, and male/female adapters in filled PTFE or graphite composites. Lantern rings facilitate glycol injection for sour service lubrication. This design maintains seal integrity through 10,000 cycles, complying with API 6A PSL3G. Pressure bala... https://globalsealstech.com/