HALE Silencer AP Series, Installation, Operation And Service Maintenance Manual

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Section 2: Introduction
Hale Products, Inc., May 2006, Rev-B
Introduction
❑
The stationary
seat is in con-
stant contact with
a rotating seal
ring to prevent
leakage. The
sealing dia-
phragm is made
of a rubber elas-
tomer specifically
designed for
high-tempera-
ture operations.
Note: Mechanical seals do not drip like other pump packing. A Hale pump with a
drip from the seal requires service.
WARNING !
IF A PUMP IS OPERATED WITHOUT WATER FOR EXTENDED PERIODS, OR
WITHOUT DISCHARGING WATER, IT COULD OVERHEAT. THIS CAN DAM-
AGE THE MECHANICAL SEAL OR THE DRIVE MECHANISM.
Ball and Tapered Bearings
Bearings support and align the impeller and input shafts for smooth opera-
tion. Anti-friction bearings are used and offer a major contribution to the life
of a pump.
When replacing bearings, it is important that you do not interchange bearing
manufacturer’s components. The bearing race and cone must always be
replaced in matching sets, as supplied by the manufacturer.
Transfer Valve
A transfer valve allows the operator of a two-stage pump to select between
volume and pressure operations, and is controlled from the apparatus pump
control panel. This valve is an all-bronze waterway device that can transfer
between pumping modes with a one-quarter turn of its control handle. The
position of the valve is indicated on ____ by ____. An optional air actuated
power transfer valve is also available.
Figure 2-5: Typical Mechanical Seal Overview