Shaft and Seal Alignment greatly effects mechanical seal life. There are many factors that contribute to misalignment. This issue covers causes and corrective action for static misalignment shaft and seal misalignment.
The Lawrence Zero-emission pump is designed for handling slurries. With rolling element bearings, and a shaft that meets or exceeds API 610 design requirements, the motor can handle many times the radial and thrust loads of a standard sleeve bearing canned motor. Lubrication of the bearings and cooling of the motor are no longer dependent on the process stream.
Handles up to 50% by Weight Solids Our motors are designed to be used as drivers for slurry pumps handling hazardous liquids containing up to 50% by weight solids. The pump incoporates a robust shaft and bearing design that offers a B-10 bearing life in excess of 40,000 hrs., shaft deflection of less than 0.002" at the seal faces and a rotor assembly that remains stable under changing load conditions.
Can run dry indefinately Many sealless pump designs cannot tolerate dry running as critical pump components such as mechanical seals and/or bearings rely on the process fluid for lubrication and cooling. The lubrication system on the Lawrence Zero-emission pump is completely independent of the process fluid. If the pump runs dry, motor cooling and lubrication are not affected.
Lower Speeds For Lower Cost For slurry applications lower pump operating speeds provide a significantly longer operating life due to reduced casing and impeller wear. The Lawrence Zero-emission slurry Pumps with their roller element bearings and internal lubrication system are ideally suited for reduced speed operation. The lower speed capabilities of the Lawrence Canned Motors allow them to be used with Variable Frequency Drive Units for process control and improved process unit efficiencies.
