Specification: Description:Braided from low-sulphur expanded graphite yarns, which are reinforced by cotton or glass fiber. It has a very low friction, does not damage shafts or stems. It shows good thermal and chemical resistance and high elasticity. CONSTRUCTION: Other reinforcement materials are also available: Glass fiber--------High strength, lower cost Carbon fiber------Less weight loss HY-S689F --Flexible Packing with Corrosion Inhibitor Corrosion inhibitor acts as a sacrificial anode to protect the valve stem and the stuffing box. APPLICATION: HY-S689 & HY-S689F is a multi-service packing capable of a wide variety of uses throughout a plant. It can be used in valves, pumps, expansion joints, mixers and agitators in high-pressure, high-temperature hostile environments of hydrocarbon processing, pulp and paper, power stations, refineries and industries where effective sealing is vital. Precaution: in oxidizing environment.