Page 154 - Centrifugal Pumps Design and Application

132 Centrifugal Pumps: Design and Application

Figure 9-14. Vertical pump assemblies (courtesy BW/IP International, Inc.
Pump Division, manufacturer of Byron Jackson/United™ Pumps).

bricated and the other bearings lubricated by the pumped liquid. This de-
sign lends itself well to smaller pumps with up to 18-inch bowl diameter
and 2-inch shaft diameter. However, the following limitations must be
noted:

* Taper collet mounting of impellers, depending on shaft diameter and
material combinations, is only recommended for handling liquids from
0°F to 200°R The same temperature limitation applies to semi-open
impellers.
* A grease lubricated bottom bearing is only recommended for ambient
temperature water service; otherwise, lubrication with the pumped liq-
uid should be used with filtration when required.