A-A-52026
2. Design and performance.
Pumps. The pumps shall be the volute centrifugal type. The pump and pneumatic motor shall be contained in a single housing or shall be contained in separate housings bolted together to form a single unit. All moving parts shall be enclosed. The suction inlet shall be located in the base of the pump and shall be provided with a strainer. The pump impeller shall be of the removable semi-open or enclosed-vane nonclogging type. The pumps shall operate in a dry sump for not less than 30 minutes without damage. The pumps shall deliver 210 GPM at 25 feet total head when pumping water. This capacity shall not cause the pneumatic motor to exceed the maximum allowable air consumption rate.
Class 1, regular. The class 1 sump pump shall pump water, sewage, and sludge when completely submerged. The weight of the pump unit shall not be more than 70 pounds.
Class 2, nonsparking. The class 2 sump pump shall pump hydrocarbons having specific gravities from 0.68 to 0.935, at a temperature from +40 to +80 F. The weight of the pump unit shall not be more than 80 pounds. All parts of the pump in contact with the hydrocarbons shall be composed of non-sparking materials and certified for use with flammable liquids.
3. Pneumatic motor: The pneumatic motor shall be the rotary-vane type. Air consumption at
80 pounds per square inch gage (psig) shall not be more than 140 cubic feet per minute (cfm) when pumping at rated capacity. The no-load speed in revolutions per minute shall not exceed the air motor manufacturer's recommendations. The air inlet shall be equipped with a pipe-to-hose adapter and a 3/4-inch pneumatic hose coupling. The air inlet shall be internally threaded NPT and shall have a zinc-free removable 24-to-60 mesh strainer. The air exhaust shall be 1-1/4-inch internally threaded NPT and shall be provided with a
1-1/4 inch-NPSH pipe-to-hose adapter.
4. Material: The sump pumps shall be fabricated from compatible materials which are inherently corrosion resistant or treated to provide corrosion resistance to all applicable operating environments. Dissimilar metals shall not be used in intimate contact with each other unless protected against galvanic corrosion.
5. Safety. All rotating parts shall be guarded to prevent accidental contact by personnel.
Guard devices shall not impair the operating function. External surfaces shall be free of sharp edges and corners except where necessary and not detrimental to safety.
6. Human factors engineering. The sump pump shall conform to accepted human factors engineering design criteria as specified in the applicable sections of MIL-STD-1472.
Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this Commercial Item Description, and that the product conforms to the producer's own drawings, specifications, standards, and quality assurance practices. The Government reserves the
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