Hale SMR - Manual (Page 15)

Stainless Max Series Pumps 2-1
Introduction
SECTION
2
: INTRODUCTION
OVERVIEW
Hale Products currently offers the first and only all Stainless Steel SM
Series Pumps in three (3) models:
❑ SMR – rear mounted fire pump
❑ SMM – fully manifolded midship pump
❑ SMD – unmanifolded midship pump
Unless otherwise indicated, these procedures apply to all models of
Hale SM Series Pumps. Any variations in operations and maintenance
of the different models are addressed within the context of this manual.
The Hale line of pumps are the favorites of fire fighters throughout the
world. The SM series are revolutionary fire pumps, constructed of high
strength stainless steel. They offer the versatility, dependability, reliabil-
ity, ease of operation and reduced maintenance, so necessary to
effective fire fighting.
SM pumps are available with capacities of 1,250 Gallons Per Minute
(GPM)/5,000 Liters Per Minute (LPM) and 1,500 GPM (6,000 LPM).
PRINCIPLES OF OPERATION
This section reviews the principles of operation of Hale SM series
pumps and provides a description of the pump components.
Centrifugal Force
Hale pumps are centrifugal pumps that
operate on the principle of centrifugal
force created by a rapidly spinning disk.
Figure 2-1 shows that an amount of
water has been placed at the center of
a disk.
The disk is rotated clockwise or coun-
terclockwise, depending on pump
model, at some speed.
The water is thrown from the center
toward the outer circumference of the disk.
Figure 2-1: Centrifugal
Force, from a rotating disk