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Grinder pump station with fiberglass tank and stainless steel lid installed outside a home Grinder pump station with HDPE tank being installed. The grinder pump “station” consists of the pump, a tank, and an alarm panel. A pump for household use is usually 1 hp, 1.5 hp or 2 hp.
The pump manufacturer, Christian Ølgaard, developed a pump with a special knife system to meet the need for macerating and pumping manure in agricultural applications. Manure with high solids content, containing straw and sawdust, would clog up other types of pumps, causing unstable operation in an environment which required high reliability.
The capitalized cost of operation and maintenance of lift stations and emergency power supplies usually justifies considerable first cost for excavation or tunneling to build a gravity sewer. [3] Sewage treatment is most efficient at centralized locations; and pumping is often required to lift sewage from lower elevations to the sewage ...
In 1901, piping and heating contractor W. Frank Dowd established the Charlotte Pipe and Foundry Company in Charlotte, North Carolina, United States. [1] The foundry operated with 25 employees and cast iron soil pipes and fittings. [2] The company focused its efforts on iron casting for much of its early history. [1]
Bryant acquired the precision external centerless grinder line from Van Norman Machine Tool Company in 1972. [4] Bryant's Soviet contracts continued to be controversial that same year. Bryant's sale of 45 precision grinders enabled the USSR to improve missile accuracy and MIRV their ICBMs. Objections to the sale were quashed by Henry Kissinger. [8]
Rotating abrasive wheel on a bench grinder. Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1]
It was founded in 1854 by the inventors Philander Higley Roots and Francis Marion Roots. It is notable for the Roots blower, a type of pump. [1] Today, Roots blowers are mainly used as air pumps in superchargers for internal combustion engines; they were first used in blast furnaces to blow combustion air to melt iron. [2]
A surface grinder is a machine tool used to provide precision ground surfaces, either to a critical size or for the surface finish. The typical precision of a surface grinder depends on the type and usage, however ±0.002 mm (±0.0001 in) should be achievable on most surface grinders.