MIL --- DTL --- 51227C
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspec-
tion in accordance with 4.2.
3.2 Design and construction.
3.2.1 Materials. All materials cited on Drawing 5 --- 45 --- 2835 and its subsidiary drawings
shall conform to the specifications listed thereon or to the specific characteristics set forth on
the drawings. Material not definitely specified shall be of a quality regularly used by manufac-
turers of pumping equipment.
3.2.2 Components. All components of the item shall conform to the specifications and draw-
ings listed on Drawing 5 --- 45 --- 2835 and subsidiary drawings.
3.2.3 Manufacture and assembly. The item shall be manufactured and assembled as shown
on Drawing 5 --- 45 --- 2835.
3.3 Functioning. The pump shall meet the following requirements when running at 4400
100 revolutions per minute (rpm) for a minimum period of 15 minutes when tested as specified
in 4.4.1.
(a) Discharge 100 gallons per minute (gpm) minimum of water at a discharge head
of 205 feet 1 foot with a minimum static lift of 15 feet.
(b) Operate smoothly and not leak.
(c) Prime in a maximum of 4 minutes by using no more than 9 gallons of water.
3.4 Performance. The pump running at 4400 100 rpm shall be capable of delivering a
minimum of 50 gpm of STB slurry, made in accordance with 4.4.2, at a discharge head of 290
feet ¦ 1 foot and a minimum dynamic lift of 10 feet. The pump shall also deliver a minimum of
100 gpm of water at a discharge head of 205 feet ¦ 1 foot with a minimum static lift of 15 feet
when running at 4400100 rpm. The total head at zero flow shall be a minimum of 300 feet.
The required horsepower (hp) to drive the pump shall not exceed 20 hp when running at
4400100 rpm and pumping a minimum of 50 gpm of STB slurry or an equivalent mass flow of
water at a minimum of 140 pounds per square inch (psi) at the discharge gage.
3.5 Endurance. The pump shall be operated for a minimum of 250 hours with only minor
adjustments. The pump shall operate smoothly without overloading or leakage when tested as
specified in 4.4.3.
3.6 Performance curve. The discharge head versus capacity curve of the pump when tested
as specified in 4.4.4 shall slope continuously from high head downward toward high capacity.
The curve may approach constant head as the capacity increases but the head may never in-
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