Hale RSD - Manual (Page 17)

17 Section 2: Introduction
Hale Products, Inc., Nov. 2005, Rev-A
In tro d u ctio n
❑
Note: Stainless Max pumps (volute and impeller) are construction of corrosion
resistant stainless steel (Models SMM / SMD and SMR Series).
This gradual increase in
size maintains a con-
stant average velocity
through the volute.
The volute is a single
piece, and must be
removed to service the
impeller, clearance rings,
and mechanical seal.
Removal of the volute
can often be accom-
plished without remov-
ing the pump and
gearbox assembly from
the apparatus.
Impeller
The impeller provides velocity to the water. Water enters the rotating impel-
ler at the intake (or eye), and is confined by the shrouds and the vanes to
build pressure. The vanes guide water from the inlet to the discharge and
reduce the turbulence of the spinning water.
Figure 2-4: Impeller Operation
Figure 2-4: “Impeller Operation” traces a drop of water from the intake of the
impeller to the discharge outlet.
Figure 2-3: Typical Pump and Gearbox Overview