TM 5-3825-270-10
0020
LOAD TANK AT STRAINER WITH SYSTEM PUMP AND FLOATING STRAINER - Continued
7
15
16
Figure 10. Load Tank At Strainer With System Pump And Floating Strainer.
NOTE
If floating strainer continues to suck air when attempting loading operations, inlet gauge will
not increase vacuum sufficiently and outlet gauge will not show pressure increase. It may be
necessary to pull suction hose and strainer toward the edge of water source enough to hold
down hose and submerge floating strainer until water begins to load all the way to tank. Once
purged of air, floating strainer will float deeper and allow hose to be again pushed in water
further. This is more likely to be required when loading from shallow water.
19.
When water begins to load steadily, it may be necessary to reduce flow rate if inlet gauge (Figure 10, Item 15)
shows excessive inlet vacuum (more than -25"Hg). This is accomplished by partially closing valve V5 (Figure
10, Item 7) until inlet gauge reading is less than -25"Hg and outlet gauge (Figure 10, Item 16) reading shows
increased pressure (up to 50 psi) which makes the pump deliver water to tank slower.
NOTE
Inlet gauge will continue to show excessive inlet vacuum even at slow water pumping rates
when debris must be removed from floating strainer or system strainer at connection point
C1.
20.
If strainer shows a large whirlpool in water where air is being pulled down, it may be necessary to reduce flow
rate even further by the same method. Reduce flow using valve V5 (Figure 10, Item 7) until the whirlpool at
the strainer is eliminated, very small (pencil size), or only appears for short intervals.
