a) Pressure switch or sensor wired to stop
the drive motor. Ideally, the motor should be
fitted with a brake.
b) Pressure relief valve or bursting disc fitted
downstream of the pump and piped to direct
excess fluid away safely.
c) Pressure protection device fitted to pump
end cover. Hy~Line pumps can be ordered
with this already fitted or this can be ordered
from your supplier and easily fitted in place
of the standard pump end cover.
d) Torque limiting coupling between drive
and pump shaft.
e) Motor current sensor.
Note: The level of protection provided by
methods a) b) and c) above is superior to
that provided by methods d) and e) which
can be difficult to set accurately, especially
when pumping viscous fluids.
Protection devices must be set to operate
at, or below, the safe operating pressure of
the pump or of the system, whichever is the
lower. (See performance data sheet). Note
that maximum pressure varies with
temperature.
3. LUBRICATION
Jabsco Hy~Line and Ultima pumps have oil
lubricated shaft bearings and timing gears.
Pumps are supplied without oil in the
bearing housing.
Before starting they must be filled with any
of the following grades of oil, or equivalent
gear oil for the relevant ambient
temperature:
Examples: Shell: Vitrea , BP: Energol CS,
Castrol: Magna
Refer to Performance Data Sheet for oil
capacity.
• After the first 120 hours of service drain
the lubricating oil from the bearing
housing and refill with fresh oil of the
correct grade.
• Check oil level regularly and top up as
necessary. Any substantial oil losses
should be investigated immediately.
• Oil should be changed every 12 months
or 2500 hours running.
• When pumping hot liquids or when
bearing housing temperatures exceed
80ºC (180ºF) during operation use a high
temperature synthetic oil and change oil
every 6 months or 1000 hours running.
Page 15
Hy~Line and Ultima Lobe Pumps
07/03
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