Abstract: A packing system for valves includes a preformed packing, an upper packing cup, a lower packing cup, and a threaded bushing or a gland yoke capable of capturing the upper packing cup when the system is installed in a stuffing box. The preformed packing includes an inner cylindrical shell surrounded by an outer cylindrical shell. Two evenly spaced perforated metal sheets are provided intermediate the inner and outer cylindrical shells. The preformed packing is compressed between the upper and lower packing cups to form a tight seal around a shaft passing through the stuffing box. When the preformed packing is compressed, the perforated metal sheets engage the upper and lower packing cups. When replacing the preformed packing, simply lifting the upper packing cup away from the stuffing box will also cause the preformed packing to be lifted out of the stuffing box.

Abstract: A packing system, for providing a seal around a valve stem, including a packing cartridge and a bushing. The packing cartridge includes a sleeve which has a tapered central passage. The sleeve also has external male threads and a hex head. Packing material is attached to the tapered central passage of the sleeve using an adhesive. The sleeve together with the packing material form the packing cartridge. The bushing also has a tapered central passage. The packing of the present invention is applied by sliding the bushing around the valve stem, and then sliding the packing cartridge around the valve stem. Once the bushing is seated in the stuffing-box of the valve, the sleeve is tightened down into the stuffing-box, thus squeezing the packing material and creating a seal around the valve stem.