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PRINCIPLE OF OPERATION
The Smith Meter is of the Rotary Positive Displacement
Type. The accurately machined housing contains a
rotor which revolves on ball bearings and carries four
evenly spaced blades. As liquid flows through the
Meter, the Rotor and blades revolve about a fixed cam,
causing the blades to move outward. The successive
movement of the blades forms a measuring chamber of
precise volume between two of the blades, the rotor, the
housing, the bottom and top covers. A continuous
series of these closed chambers is produced, four for
each rotor revolution. Neither blades nor Rotor contact
the stationary walls of the measuring chamber.
One of the outstanding features of the Smith Meter
principle is that the flow is literally undisturbed while it is
being metered. Energy is not wasted by arresting liquid
velocity; consequently high accuracy and efficiency are
commonplace with Smith Meters.
FIG. 1. DRAWING SHOWS PRINCIPLE OF
A.O.SMITH ROTARY METER.
FlG. 2. CONSTRUCTIONH OF 6 AND 10 SERIES METERS.
A9-18
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