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A curb box (also known as a valve box, buffalo box, b-box, or in British English stopcock chamber) is a vertical cast iron sleeve, accessible from the public way, housing the shut-off valve (curb cock or curb stop) for a property's water service line.
The valve gear, actuated by connection to the driving wheels, ensures that steam is delivered to the piston with precision. Types are slide valves, piston valves or poppet valves. [2] [3]: 62 Valve chest / Steam chest Valve chamber next to the cylinder (24) containing passageways to distribute steam to the cylinders. [6]: 41 [3]: 75 Firebox
The Duriron Company is an industrial component manufacturer of such products as automatic control valves, valves and actuators, pumps, sealing systems, filtration equipment, pipes and fittings. The company was incorporated in 1912 as the Duriron Casting Company in Dayton, Ohio by John R. Pitman, William E. Hall, and Pierce D. Schenck. [1]
Cast iron is made from pig iron, which is the product of melting iron ore in a blast furnace. Cast iron can be made directly from the molten pig iron or by re-melting pig iron, [4] often along with substantial quantities of iron, steel, limestone, carbon (coke) and taking various steps to remove undesirable contaminants.
It is the most common cast iron and the most widely used cast material based on weight. [2] It is used for housings where the stiffness of the component is more important than its tensile strength, such as internal combustion engine cylinder blocks, pump housings, valve bodies, electrical boxes, and decorative castings.
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They also made it impractical to use secondary valves like the Meyer, running on the backs of the primary valves. Possibly the last new design to use a secondary valve as an expansion valve was the Midland Railway Paget locomotive, that used bronze sleeves as expansion valves around its cast iron rotary valves. [20]
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