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1.6 Construction
1.7 Parts description
The type 'HPX' are horizontally mounted, vertically split, back pull out single stage, single suction
overhung process pumps, constructed to the requirements of API 610 specifications, for
continuous duty service in all process industries and industrial application within the pressure and
temperature limitations.
1.8 Casing
The casing is centre line supported with end suction and top discharge. It provides for the
immediate containment of liquid being pumped as the liquid is directed from the suction nozzle
through the impeller and then through the volute to the discharge nozzle. The casing also provides
the centre line attachment to the baseplate or support. A wear ring is mounted in the casing to
provide a close running clearance with the impeller wear ring.
1.9 Impeller
The impeller is a single suction, radial flow, closed design. The impeller is dynamically balanced,
keyed to the shaft and secured by locknut and lockscrew. Renewable wear rings are a press fit
onto the impeller hub and positively secured with radial screws.
1.10 Casing cover
The casing cover is designed to accommodate single, tandem or double elastomer and metal
bellow cartridge seals to the dimensional requirements of API 682. On certain models a wear ring
may be mounted in the cover to provide a close running clearance with the impeller back wear
ring.
1.11 Shaft
A high strength shaft is of stiff shaft design, machined over its entire length to close tolerances.
The shaft transmits the required power without vibration.
1.12 Bearing housing
The bearing housing is air cooled with fan type flingers provided at inboard and outboard ends.
The bearing housing contains the thrust and radial bearings and, for other than pure mist type
lubrication, serves as the oil reservoir for the bearing lubricating oil. For other than pure mist
applications, a constant level oiler is provided for maintaining required oil level. Labyrinth type
flingers help to seal the bearing housing to prevent contamination of the lubricating oil.
A finned type cooling insert is available as an option for the cooling of the lubricating oil. Provision
for purge oil mist is standard whilst pure oil mist lubrication is optional.