Patent ID: 6997688

Claim:
A magnetic-drive pump comprising an impeller, a rotor separated from the impeller by a primary container, a drive shaft associated with the rotor for rotating the rotor, wherein the improvement comprises: a bearing associated with the drive shaft and receptive of a lubricant; the primary container arranged to contain a pumped fluid within the primary container during a normal operational mode of the pump; and a secondary container for containing the pumped fluid if the primary container leaks, the secondary container supporting a dry-running seal associated with the drive shaft, the secondary container arranged to contain a pumped fluid leaking from the primary container during a failure mode of the pump, the dry-running seal spaced apart from the primary container and comprising a stationary portion and a rotating portion; the rotating portion secured to the drive shaft; the dry-running seal isolated from receiving the lubricant associated with the bearing, the secondary container and the dry-running seal arranged to isolate the bearing from contamination with the pumped fluid upon leakage of the primary container.