Abstract: A one-piece, circular, power end seal for use in sealing gear boxes of heavy-duty reciprocating pumps. The power end seal generally includes a u-shaped, circular seal body having an open channel, a plurality of ribs tangentially mounted within the channel and a ring-shaped, fiber-filled dynamic seal being formed within an inner diameter wear surface of the seal body. The ribs generally provide the seal body with improved flexibility to maintain a constant and effective seal around connecting rods within the gear box, while at the same time retaining sufficient resilience to maintain static interference in a packing gland within the gear box. The inner diameter dynamic seal can be filled with PTFE, bronze filled PTFE, carbon filled PTFE or aramid fiber filled HNBR, which reduces heat build up and seal wear, while minimizing the radial squeeze of the seal in contact with the circumference of the connecting rod.

Abstract: A pressure actuated packing assembly for use in sealing the annular area of fluid flow devices to provide and maintain an effective, long-term seal therein. The pressure actuated packing assembly is designed for use in chemically hostile environments, and for applications involving temperature and pressure differentials. The pressure actuated packing assembly automatically adjusts for wear, misalignment and service irregularities, while generally reducing the leakage and fugitive emission escape of fluid, flowing therethrough. The pressure actuated packing assembly is preferably constructed of an elastomeric energizer, a circular jacket member having an internal channel to substantially retain the elastomeric energizer and a rigid sealing insert member preferably disposed within the channel of the jacket member.