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Long-term Operation
The Dual Seal System gives long pump service life. The mechanical Dual Seal System
protects the motor from water with one shaft seal at the top and one shaft seal
below an oil chamber. The oil chamber provides lubrication for the seals and traps
any moisture that may leak through the lower seal. The upper seal operates entirely
in oil.
Self-Sealing
The lower seal is “self-sealing” with pressure surges
because it is located outside the chamber. Pressure surges from
the volute push the lower seal tightly against the stationary face
to prevent leakage into the oil chamber.
High Performance
Hydromatic use high performance, low friction, long-lasting carbon-ceramic
seals. Some manufacturers use very expensive sales that are only
available from their own factory. Hydromatic pumps use repairable
John Crane* Type 21 mechanical seals that are available off-the-shelf
worldwide. Nickel-Tungsten-Carbide Seals are optional. The dual
seal design gives the pump exceptionally long pump service life
by keeping pumped media out of the motor housing.
Moisture Sensor
Hydromatic pumps incorporate an internal moisture sensor that
detects the presence of moisture in the oil chamber. The sensor's
signal to the warning system lets you know that the lower seal
is beginning to leak. This allows you to schedule maintenance
within 2 to 4 weeks while the pump continues to operate. The moisture
sensor allows you to perform maintenance at your convenience instead
of reacting to an emergency breakdown.
Decrease Downtime
The moisture sensor, provided as standard on all non-clog pumps,
saves money and decreases downtime by allowing you to take corrective
action before an expensive bearing or motor failure occurs.
Some manufacturers put a moisture sensor in the motor area. Moisture
is detected after it begins affecting the bearings and motor itself.
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