Product Description
Model API 3171 Installation, Operation, and Maintenance Manual
13
Column pipe
The column pipe has flanged connections that are machined in order to ensure true parallelism
and to maintain steady bearings concentric with the shaft.
Shaft
The standard design uses a one-piece shaft in order to ensure accurate alignment. The shaft is
precision-ground, polished, and straightened to keep vibration and deflection to a minimum.
Standard bearing spans keep the shaft well below first critical speed for all sizes.
Bearings
The thrust bearing is grease- or oil-mist-lubricated and consists of a pair of single-row, angular
contact ball bearings arranged back-to back. The bearing is shouldered and locked to the shaft
and housing. This enables the bearing to carry all of the thrust loads and some of the radial
load. All fits are precision-machined to industry standards. The steady bearings are press fit
sleeve bearings. Fits are designed for optimum life under all operating conditions.
Seals
This pump has three seals:
Seal type
Description
Upper labyrinth seal
This seal is used to exclude dirt and water from the thrust
bearing.
Lower labyrinth seal
This seal is used below the thrust bearing in order to contain the
grease and exclude any possible contamination.
Carbon PTFE casing collar
This seal is installed immediately behind the impeller in the
casing in order to minimize recirculation back to the sump and
maximize hydraulic efficiency.
Motor support
Motor supports are cast construction and precision-machined in order to maintain proper
alignment between the motor and pump shaft with minimal shimming. Motor supports are
designed for vertical C-face motors as standard. P-base supports and IEC adapters are
available upon request.
Direction of rotation
The shaft rotates clockwise when you look down on the pump shaft.
Enclosed lineshaft
The enclosed lineshaft design lends itself well for applications where abrasives are present in
the pumped fluid, or when a bearing lubricant other than the pumped fluid is required.
Lubrication system
CAUTION:
The fluid must run continuously to ensure flow out of the column at all times. If the flush stops,
the fluid in the sump can back up into the column. This contaminates the bearings.
The main feature of this modified design is a positive lubrication system for all bearings. This
design requires a minimum of lubrication fluid due to the bushing located at the bottom of the
column adapter housing directly above the impeller.
Acceptable leak rates
Leaks (flows) across the bushing for certain pressure differentials are shown in this table.
Higher pressures will result in higher leaks.
Pressure differential (PSI)
Approximate leak rate (GPM)
3.0
0.33
5.0
0.44
Содержание Goulds Pumps API 3171
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