Hale SMR - Manual (Page 20)

Introduction
2-6 Stainless Max Series Pumps
The impeller is mounted so that the discharging tube is widest at the
pump outlet. The volute collects the water. A further increase in
pressure and a decrease in velocity take place in the diffuser which
is cast into the pump body.
Bearings
Bearings support and align the impeller shaft for smooth operation.
Mechanical Seal
The mechanical seal is common to Hale SM series pumps. (See
Figure 2-6: “Mechanical Seal Overview.”)
The stationary seat is
in constant contact
with a rotating seal
ring to prevent
leakage. The sealing
diaphragm is made
of a rubber elastomer
specifically designed
for high-temperature
operations.
Priming
The SM series
pumps requires a priming system to evacuate air in the suction hose
and pump. See separate heading “Priming System,” on page 2-11.
WARNING !
IF A PUMP IS OPERATED WITHOUT WATER FOR EXTENDED PERIODS,
OR WITHOUT DISCHARGING WATER, IT MAY OVERHEAT. THIS MAY
DAMAGE THE MECHANICAL SEAL OR THE DRIVE MECHANISM.
Gearbox - SMM and SMD Series
The gearbox is dependent on the pump model selected. See
Figure 2-7: “SMM/SMD Pump and Gearbox Configuration,” on page
2-7 for a sample configuration.
Within the gearbox a gear set and input drive shaft, made of heat-
treated nickel steel, transfers engine power to the impeller.
Figure 2-6: Mechanical Seal
Retainer
Seal Ring
Diaphragm
Impeller
Shaft
Stationary
Seat
Pump
Head