146 DUCHAINE BLVD., NEW BEDFORD, MA. 02745-1292 TEL. 508-995-9711 FAX 508-995-5021 E-MAIL [email protected]
Running The Pump Dry:
This Pump will run dry indefinitely without damage.
Pumping Liquids with Suspended Solids:
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KEEP SOLIDS IN SUSPENSION - When the pump
is used to pump solid matter such as sludge at
the bottom of a tank, or to dredge out a section of a
lagoon make, sure the solids have enough liquid
mixed in to allow it to flow. Raking or stirring while
the pump is pumping will keep solids in
suspension. Rule of thumb in pumping viscous
liquids or combinations of liquids with solids, "If It
Will Not Flow Through A Line Under Gravity, The
Pump Will Most Likely Not Pump It."
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FLAPPER CHECK VALVES AND SOLIDS -
Solids trapped under the check valves will
prevent self priming. This is likely to occure when
the pump is used in sewage or sump pump out
applications . Flushing with water will generally
clear out the solid matter. Installing secondary
clear flapper check valves right at the inlet and
discharge will improve the dry suction start
performance of the pump and make clearing the
valves easy. Order Edson Clear Check Valves
69CL-150 (1.5").
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PUMPING AT THE PROPER SPEED - When
pumping liquid with solids the speed may be too
slow to keep the solids and the liquid combined.
The solids will stop moving and begin to clog the
line. Pumping at a faster rate or decreasing the
hose size to increase velocity may be the solution.
Check With Edson Customer Service.
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USING A STRAINER ON THE INLET - If the
solids are too large they will block the inlet or get
stuck in the suction line. The end a suction hose
can become attached to a flat surface cutting off
all flow. Using an Edson strainer will prevent
these conditions. Order an Edson Shatterproof
Bronze Strainer 111BR - 150
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USING A DISCHARGE LOOP - For sewage and
sump applications when the discharge drains
naturally down and away from the pump, installing
an 8” to 10” positive loop right on the discharge port
will improve the self priming feature. When you
stop pumping the loop traps some liquid against
the discharge valve improving the seal.
Operation Guidelines
Union Ball Valve
Union Check Valve
PVC Pipe Adapter
P-220A-03
Discharge Loop
Page 6 Operation Guidelines