OM−02806 0 SERIES
PAGE B − 4 INSTALLATION
NOTE
The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of the suction line. The larger opening size will
reduce the inlet velocity. Calculate the required
submergence using the following formula based
on the increased opening size (area or diameter).
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower
than that of the liquid being pumped unless a si-
phon breaker is used in the line. Otherwise, a si-
phoning action causing damage to the pump
could result.
Valves
This pump is fitted with manually-operated suction
and discharge valves. By alternately opening and
closing these valves, more than one type of liuid
(fuel) can be pumped from and to different loca-
tions withoug repositioning the suction and dis-
charge lines each time. See Section C, Flooded
Suction Application, for valve and discharge el-
bow use when pumping above the level of the
pump.
The discharge valves are throttling valves; howev-
er, the suction valves are not throttling valves and
should never be used as such.
With high discharge heads, use the discharge
throttling valves and discharge check valve to pro-
tect the pump from excessive shock pressure and
reverse rotation when it is stopped.
If the application involves a high discharge
head, gradually close the discharge
throttling valves before stopping the
pump.
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