MIL-PRF-12732F
TABLE I. Operating flows and pressures.
Flow rate
Discharge pressure
Condition
(gpm)
(psig)
Al
350±8
100
A2
210±7
100
A3
70±6
100
Bl
70±5
25
B2
42.5±3
25
B3
15±1
25
Cl
l5±1
25
C2
8.5±0.8
25
C3
2+0.5/-0.0
25
4.5.2.3.2 Test setup and procedure. Test setup shall be as follows:
a. Connect the unit to a source of tap water capable of delivering not less than 350 gpm
at 125 psig so that the flow enters the inlet end of the 4-inch line and leaves at the
outlet end.
b. Flow rates shall be set with calibrated rotameters, or the discharge shall be caught in a
container of known volume or weighed if desired.
c. A single adjustment of the range valve shall be made for each of the conditions
shown in table I.
d. Provide a means of measuring total waste flow from the diaphragm pump.
e. Set up a 1,000 cubic centimeter (cc) graduate (divided every 2 cc) as a solution
reservoir and fill with water. Place on a support so that the water level, when full, is
at the same elevation as the liquid level in the solution container when full.
f. Remove suction tubing and attach to bottom of graduate. Do not immerse tubing in
an open top graduate.
g. Adjust the dosage control to maximum setting.
Test procedure shall be as follows:
h. Adjust range valve to range A position.
i. Set up Condition Al (table I) as follows: Open downstream back-pressure valve.
Open inlet line valve and adjust backpressure valve until indicated flow rate is
350 gpm with a discharge pressure of 100 psig ±2 psig.
j. With Condition Al established, make a test run in the following manner:
1. Start timing the run, using a stopwatch, just as a suction stroke is completed
by the diaphragm pump.
2. Immediately read the solution graduate and record the data.
3. During the run, observe the pressure drop across the unit. The pressure drop
shall not exceed 18 psig (36.6 inches of mercury [in. Hg]). Also measure total
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