HALE AP, Техническое руководство

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2.4.2.1 Volute
The Hale AP, CBP, and MBP single stage booster volutes (body) are a single-piece casting. Ser-
vice of the impeller, clearance rings, and mechanical seal is accomplished by removing the vol-
ute from the assembled pump head and gearbox. The Hale RSD single stage booster volute is a
three-piece casting, with service of the impeller, clearance rings, and mechanical seal accom-
plished by removing ONLY the appropriate piece of the volute required to access the component
requiring service.
All volutes are constructed from fine grain cast iron. For areas where salt water is commonly
used, a bronze version of each booster pump is available.
The Hale Flex Series single stage booster pumps support multiple discharge port configurations.
Depending on the model, the pumps provide between 12 and 24 different configurations (includ-
ing both rotations – ER or OER). Refer to the Parts Manual For Hale Single Stage Booster Pumps
(FSG–MNL–00185), Section 2,
Hale Booster Pump Illustrated Breakdowns, (
Gearbox And Dis-
charge Positions paragraphs) for a reference to the appropriate drawing and sheet number(s)
providing the views of the volute positions.
2.4.2.2
Impeller And Shaft Assembly
The impeller provides velocity to the water. The impeller is made of high quality bronze and is
mounted on a stainless steel shaft that is rotated by the gearbox. Water enters the rotating im-
peller at the intake (or eye). The vanes guide water from the intake to the discharge. Vanes curve
away from the direction of rotation so water moves toward the outer edge (see Figure 2). The
shrouds (discs) form the sides of the impeller and keep the water confined to increase accelera-
tion and pressure. The back of the impeller houses the rotating portion of the mechanical seal.
2.4.2.3
Mechanical Seal
The mechanical seal is common to all Hale booster pumps. Figure 4 shows a stationary seat is in
constant contact with a rotating seal ring to prevent leakage. The seal ring/diaphragm is specifi-
cally designed for high-temperature, low friction, self-adjusting, dependable operations.
Figure 5. Mechanical Seal
IF A PUMP IS OPERATED WITHOUT WATER, OR WITHOUT DISCHARGING WATER, IT
MAY OVERHEAT. FAILURE TO FLOW WATER MAY DAMAGE THE MECHANICAL SEAL OR
THE DRIVE MECHANISM.