Pulsafeeder Eclipse Model 75 - Manual (Page 11)

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4. Equipment Setup and Operation
Prior to operation, make sure all suction piping is air tight and clean. Check that electrical service to motor agrees
with nameplate ratings. Jog the motor to check rotation and for signs of binding. To check rotation, observe the
motor fan. Rewire motor if necessary. As noted in Section 3, Installation, Eclipse Standard/Eclipse Hypo Series
pumps are bi-directional, the direction of flow is determined by the direction of motor rotation.
A LTHOUGH THE E CLIPSE S TANDARD /E CLIPSE H YPO S ERIES PUMPS ARE DESIGNED WITH SOME RUN -
DRY CAPABILITY , IT IS NOT RECOMMENDED THAT ANY MAGNETICALLY DRIVEN PUMP BE RUN DRY . T HIS
CONDITION CAN CAUSE SIGNIFICANT TEMPERATURE INCREASES RESULTING IN PREMATURE DAMAGE TO
WEAR SURFACES FROM LACK OF LUBRICATION AND / OR VAPORIZATION OF LIQUID IN THE PUMP .
Pumping fluids containing abrasives should be avoided, as accelerated pump wear will result. Eclipse
Standard/Eclipse Hypo Series gear pumps are designed to handle clear fluids at viscosities up to 10,000 cps.
The pump is designed to self prime if fluid is supplied at the pump inlet. If foot valves are used, the valve should
be of the flapper type and sized to minimize friction loss.
If the pump operates near the boiling point of the pumped fluid, a recirculation loop can be set up between the
discharge and suction connections with provisions for flow control in the recirculation loop.
Power Monitors are strongly recommended for optimum protection of all magnetically driven pumps. Consult
factory for selection and support.
Do not operate the pump against a closed or blocked discharge. Doing so can cause the magnetic drive to
decouple. If decoupling occurs, stop the motor and restart after the obstruction has been cleared.
Operation against closed or blocked discharge can also result in casing pressure that exceeds the pump’s
published safe limits. This can result in damage to the casing parts and/or containment can.
As a safety precaution, a pressure relief valve by-pass system is highly recommended. Ideally, the pressure relief
valve is set for a low pressure at start-up to allow the pump to flood with liquid and evacuate air quickly. It can
then be re-adjusted to a setting appropriate to the application.
Hardware and fasteners can loosen during transportation and installation. All pump hardware should be checked
and verified tight before placing the pump in operation. Consult the table in Section 12 for the recommended
torque values for all pump hardware.
Pump hardware should be checked on a regular basis, especially if the pump is subject to temperature variations
or cycling that might cause it to loosen during operation.
Start pump with discharge and suction valves open and check for proper operation. Excessive noise or vibration
is an indication of harmful cavitation, which may be due to insufficient NPSH (Net Positive Suction Head).