Milestone
Casting
Chemical Process pump having top centerline discharge, self-venting casting, arranged for back pull-out. Fully confined gasket. Foot support under casing for maximum resistance to misalignment and distortion from pipe loads. ANSI-B-16.5 (Class 150) flanges standard, ANSI-B-16.5 (Class 300) optional for working pressure to 2550 kPa with 3 mm corrosion allowance. For Maximum Corrosion-erosion resistance casing is supplied without tapped openings but gauge and drain plug openings are provided when specified.
Impeller
Pump impeller matched to casting for high efficiency and low NPSH. Fully open, with partial shrouds for maximum vane support without the high thrust inherent in closed impellers. Stuffing box pressure is reduced and the entrance of solids is prevented by back pump-out vanes. Large, smoothly contoured flow passages combine the best slurry and solids-handling ability. The impeller is locked on the shaft with an impeller lock-nut and sealed by a Teflon (PTFE) gasket. State-of-the-art casting methods provide the smoothest possible surfaces for the highest efficiency. All impellers are statically balanced.
Shaft
Pump with a single-piece shaft is designed for a maximum deflection of 0.05 mm at the stuffing box face. All critical surfaces are ground to a finish of less than 0.8 micron.