| Rotating seal face body integrates a pumping ring to maximize circulation flowthrough a Plan 23 seal cooler and return the flow directly at the seal interface, eliminating the expense of cool injection systems. Tungsten carbide rotating face is mounted and driven in an optimal, low stress configuration to remain flat under all operating conditions for very low leakage performance. Large, low spring rate single coil spring tolerates axial setting variations common to high temperature pumps. Robust U-cup seal flexibly mounts the rotating seal face while compensating for minor misalignment of the shaft and maintaining consistent seal face contact. Spring holder enables a strong drive linkage from the sleeve to the seal face while isolating the spring from torque. Seal installation is simplified with cartridge seal assembly or, as special equipment requirements demand, the seal can be installed by components. |