Hale SMR - Manual (Page 17)

Stainless Max Series Pumps 2-3
Introduction
Hale SM series pumps use a
single impeller to develop the
required volume and pressure.
(See Figure 2-2: “Pump Impeller.”)
During operation water enters the
suction eye of the impeller. The
rotating impeller vanes develop
discharge pressure and direct the
water to the discharge opening.
The cut water is a wedge that
divides the water between the
volute (pump body) and the pump
discharge. (See Figure 2-3: “SM
Pump Water Flow.”)
There are three model SM series pumps available. The anticipated
position on the apparatus determines the model selected as well as
the drive unit.
SMM - midship series of
pump. Driven by split
shaft X-series gearbox,
the SMM-X Series is a
fully manifolded package.
SMR - rear mount series
pump. Pedestal mounted.
Available as direct drive
(-U version) or with a two
gear PTO gearbox
(-A version).
SMD - midship series of
pump. Driven by a split
shaft HG or X-series gearbox, with optional 6” (152 mm) suction
Victaulic flange or weld Rams Horn. Single-stage end suction,
centrifugal pump connected to split-shaft PTO transmission.
Cavitation
Cavitation occurs when a centrifugal pump is attempting to dis-
charge more fluid than it is receiving. When cavitation occurs,
bubbles are created under the vacuum, near the eye of the impel-
ler. Cavitation is often referred to as “the pump running away from
the fluid supply.”
Figure 2-2: Pump Impeller
Figure 2-3: SM Pump Water Flow
Discharge
Diffuser
Impeller
Vanes
Suction Eye
(Intake)