Vertical Cantilever pumps are designed for installation in a sump or tank where it is desirable not to have a bearing in the pumpage, having only the casing and impeller submerged in the pumpage for priming. The support bearings for the rotating element are located remotely above the pumpage in a dry environment. There are no throttle bushings, bumper bushings, or rings of any type located at the impeller or submerged below the maximum normal water level.
Capabilities:
Flows to 20,000 GPM (4,540 m3/hr)
Heads to 300 ft (91 m)
Temperatures from 1100° F (600° C)
All casings are heavy walled construction. Enclosed impellers are available with front and back repelling vanes to minimize axial thrust loading, reduce recirculation, and increase wear life in abrasive pumping applications. All impellers are keyed to the pump shaft and secured using an impeller nut. Impeller clearances are easily adjustable at the thrust bearing location. No foot valves are used. The pumps are capable of operating dry with no adverse effects.
All shafts are designed to operate approximately 30% below the first critical speed. Pumps can operate over the complete capacity-head range without restriction. Heavy duty, anti-friction type, thrust and radial bearings are located in all pumps, above the maximum normal water level. These bearings accomodate all axial and radial loads without transmitting any loads to the driver.
Cantilever pumps are available for sump use and also for sealed tank mounted applications. Cover plates can be made to suit. ASME Code Stamped cover plates are also available.
Grease lubrication is standard, although oil mist, forced oil, or internally circulated self contained oil lube systems are available. Both v-belt and direct drive motors are an option.
Product Applications
Pigments
Solar Power
Petroleum Refining
Steel Production
Cantilever pumps are avaliable in base, hip, or shoulder mounted arrangements, based on the depth of the sump or tank and the maximum mormal and minimum water levels. The most common design for a Cantilever pump is the base mounting, where the bearing frame is mounted above the cover plate. This arrangement is typically used when high temperature fluids or toxic liquids are being handled, as a sealing device is required at the cover plate.
Used for bottom suction pumps only, a suction tailpipe is often added to allow the pump to empty the vessel to a much lower level. When the liquid level surpasses the impeller, the pump primes itself and begins pumping. No special priming devices are required. The tailpipe is designed for smooth entry and controlled velocity. A large, basket- type screen is available to prevent oversized solids from entering the pump.
