15
PRIOR TO OPERATING THE PUMP, MAKE SURE THAT
THE SHAFT ROTATION, PIPE CONNECTIONS, AND
THE RELIEF VALVE POSITION IS IN ACCORDANCE
WITH THE ILLUSTRATIONS SHOWN.
To reverse rotation, the relief valve must be positioned as shown for desired direction of rotation.
See appropriate instructions to change relief valve position if required.
For inlet pressures over 25 PSIG (1.7 BAR), consult a distributor, district representative or the
home office of the ROPER PUMP COMPANY, COMMERCE, GEORGIA.
LUBRICATION
All lubrication fittings have been greased at the factory. The internal parts of the pump are
lubricated by the liquid being pumped. Outboard bearing or bearing cage should be greased with
ball bearing grease once a month in daily service or equivalent in intermediate service.
RELIEF VALVE
The relief valve must be positioned as shown in instructions for direction of rotation—otherwise
the valve is inoperable and will not give protection.
It is mandatory that the relief valve be set BY THE USER since the maximum relief valve pressure
depends upon the viscosity and specific gravity of the liquid, the flow rate (pump RPM), and also
the initial relief valve setting. If not specified otherwise, the relief valve on this pump is factory set
for full by-pass at a differential pressure of 300 PSIG (20.7 BAR), at a pump speed of 900 to 1800
RPM on liquid with a viscosity of approximately 150 to 300 SSU (28 to 62 centistokes). This
setting would only apply if all these conditions are duplicated. Built-in relief valves sense
differential pressure only (difference between inlet and outlet pressures.)
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