OM−02806 0 SERIES
OPERATIONPAGE C − 2
tion (boiling), priming cannot be accomplished. If
vaporization occurs, shut the pump off and allow
the pump and liquid to cool enough to safely open
the priming cap. Drain the casing and refill with
cool liquid or, if possible, a liquid with a lower vapor
pressure (Mogas has the highest vapor pressure,
jet fuels a lower vapor pressure, and water the low-
est vapor pressure.)
NOTE
When operation requires drawing suction from
both suction inlets, close one of the suction valves
and prime the pump from the open portion of the
system before opening the second suction valve.
STARTING
Consult the operations manual furnished with the
engine. Check the engine lubrication as described
in the literature accompanying the engine and fill
the fuel tank with fuel.
Open the suction and discharge valves. Start the
engine and operate between 2100 and 2400 RPM
(best priming speed.)
Priming is indicated by a positive reading on the
discharge pressure gauge and/or quieter opera-
tion. When priming begins, reduce the engine
speed to idle and close the discharge valve so it is
1/3 to 1/2 open.
Failure to reduce the valve opening and en-
gine speed to idle during priming can
cause severe hydraulic shock if the line is
filled too fast, resulting in hose rupture and
fitting failure.
The pump may not prime immediately because the
suction line must first fill with liquid. When the dis-
charge line is full, increase the engine RPM and ad-
just the discharge valve to achieve the desired flow
rate. If the pump fails to prime within a few minutes,
stop the pump and check the suction line for leaks.
Flooded Suction Application
When installed in a flooded suction application,
simply open the system valves and permit the in-
coming liquid to evacuate the air. After the pump
and piping system have completely filled, evacu-
ate any remaining air pockets in the pump or suc-
tion line by opening the bleeder valve on top of the
180_ discharge elbow. When a solid stream of liq-
uid is discharged from the bleeder valve, close the
valve and open the discharge valve(s).
OPERATION
Pump speed and operating condition
points must be within the continuous per-
formance range shown on the curves (see
Section E, Page 1).
Leakage
No leakage should be visible at pump mating sur-
faces, or at pump connections or fittings. Keep all
line connections and fittings tight to maintain maxi-
mum pump efficiency.
Strainer Check
If a suction strainer has been installed by the user,
check the strainer regularly, and clean it as neces-
sary. The strainer should also be checked if pump
flow rate begins to drop. If a vacuum suction gauge
has been installed, monitor and record the read-
ings regularly to detect strainer blockage.
Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the
equipment. If backflushing is absolutely neces-
sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve (see Section E,
Page 1).
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160_ F (71_C). Do not apply it at a higher operating
temperature.
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