A-A-52315
Materials. The pump units shall be fabricated from compatible materials, inherently corrosion resistant or treated to provide protection against the various forms of corrosion and deterioration that may be encountered. Dissimilar metals shall not be used in intimate contact with each other unless protected against galvanic corrosion.
Design and Performance. The pump units shall consist of a diaphragm pumps, speed reduction systems, diesel engines, and all necessary accessories and connections. The pump units shall be wheel mounted. At a speed of not more than 60 strokes per minute, the pumps shall deliver the capacities specified herein for each size of pump unit. Each pump unit shall pump against a total discharge head of 35 feet with a static suction lift of 25 feet when pumping water at standard conditions. Standard conditions are defined as an atmospheric pressure of 29.92 inches of mercury and a water temperature of not less than 68 ‘F. The pumps shall not leak when subjected to a hydrostatic pressure of not less than 50 pounds per square inch (psi).
Pump. The pumps shall be diaphragm lift-and-force type, shall be self-priming and shall pump water containing solids. The pumps shall be equipped with a suction passageway, suction valve with replaceable valve seat, suction-valve chamber, diaphragm chamber, flexible diaphragm, discharge valve with replaceable valve seat, discharge-valve chamber and discharge passageway. Valves shall be integral flapper or ball type. Means shall be provided (without uncoupling the suction or discharge hoses) for removing obstructions that might prevent the valves from seating properly. The pump case shall be either an iron or aluminum casting or fabricated of steel.
Size A pump unit. The suction and discharge ports shall be internally threaded with 3-inch NPT threads. Each port shall be provided with an externally threaded 3-inch NPT to 3-inch NH pipe-to-hose adapter made of brass or zinc-plated steel per ASTM B 633, SC IV, type II or III or galvanized to 0.9 oz/sqft. At a speed of not more than 60 strokes per minute, the pump shall deliver not less than 50 gpm at a static suction lift equivalent to 10 feet and 33 gpm at a static suction lift equivalent to 20 feet.
Size B pump unit. The suction and discharge ports shall be internally threaded with 4-inch NPT threads. Each port shall be provided with a zinc-coated per ASTM B 633, SC IV, type II or III or galvanized to 0.9 oz/sqft wrought-iron or steel 4-inch pipe nipple which is 6 inches long with 4-inch NPT threads. At a speed of not more than 60 strokes per minute, the pump shall deliver not less than 100 gpm at a static suction lift equivalent to 10 feet and 66 gpm at a static suction lift equivalent to 20 feet. When specified in the contract or order, the size B pump unit shall be provided with 4 lengths of suction hose 4 inches in diameter and 10 feet in length and shall be equipped with 4-inch NPT threaded couplings
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business