A Good Pumping Engine.

A Good Pumping Engine.

Springfield, Ill., recently bought secondhand for $15,000 a pump which thirteen years ago cost only $16,000. Its design is said to be faulty, and it will be required to lift water to an elevation of 72 ft., at a distance of from 3 to 6 miles and supply an area of 5,000 acres.

Cordele, Ga., has ordered a powerful pumping engine from the Platt Iron Works company, of Dayton, Ohio.

The installation of a new pump in the waterworks station at Ft. Dodge, la., is being completed, and it will be ready for service about the first week in June.

At Donaldsonville, La., A. Wilbert Sons are installing a pumping plant.

At Shelter Island (L. I.), N. Y., a private pumping plant is being installed on the premises of H. Des Anges, superintendent of the floating equipment of the Pennsylvania railway.

The American Car and Foundry company of Wilmington, Del., has just had a new electric pump for fire-protection, in connection with all its buildings. The pumps are installed in a concrete pumping house in the yards near the building, with fireplugs set in all of them. If a fire should break out, the pumps are put into operation and immediately draw water from the Brandywine.

On receiving an alarm of fire, the pressure on the New York eitv high-pressure system is at once raised to 125 lb,, at which end of the two pumping stations is situated in the particular zone in which the fire may break out. The other station remaining passive unless its services, also, are needed. A Ross pressure-regulator is located at each pump, on which the pressure desired is fixed, and pressure is maintained by means of the same at all times. If the flow is suddenly turned off at the hydrant, a bypass round through the Ross valve returns the water to the suction-end of the pump. If no alarm is turned in within 24 hours in either of the two high-pressure zones, the pumps at each station are run twice a day; the pressure is raised to 200 lb. and held there for thirty minutes. The normal Croton pressure on the mains is from 25 to 35 lb. maximum— sufficient to prime the pumps, which are readily started. If salt water should be used the pumps are primed and fed by three vacuum pumps, working automatically, supporting and reinforcing each other as is required. Ordinarily the small pumps can take care of the vacuum conditions ; but if the percentage of air in the salt water runs over lj^or 2 per cent., a larger vacuum pump is automatically started, which cares for the condition. The water is raised 1 ft. above the level of the pump, which provides for proper priming. The cost for pumpage of 1,000 gal. of water by electricity is .0(50 cent.; for pumping the same amount by gas-driven pumps, as at Coney Island, it is .023 cent for gas only. In Philadelphia the total cost of maintaining the pumping station, including maintenance, wages and gas, is .05 cent, per 1,000 gal. In neither case, however, is the interest on the original cost included. The electric pumps in the Manhattan system are rated at 3,000 gal. per minute; but during one fire in January last they averaged nearly 5,000 gal. per minute. The gas-driven pumps at Coney Island, which are rated at 1,500 gal. per minute; but at the July fire of last year they averaged about 1,450 gal. per minute.

At Nashville, Tenn., the new 20,000,000-gal. pumping engine has been officially placed in operation, and with the old machinery shut down, the new engine is now pumping water into the reservoir at the rate of 16,000.000 gal. per day. Operation at its full capacity will not be required regularly; but the test is to be made, and it is the intention to run at a heavy capacity for a few days, then to shut off operation for a few days for the purpose of putting asbestos covering on the steam cylinders. The recent work demonstrated that the engine operates nicely under 145 lb. of steam, though 160 lb. is required under the contract.

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