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Shut-off valves – VTS-Servis, OOO | all.biz
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Shut-off valves

Shut-off valves

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Russia, Slavansk-na-kubani
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  • Country of manufactureRussia

Stop valves are installed on pipelines, units, vessels and are designed to control the flow of working media by changing the flow area. Shut - off valves are characterized by two main parameters: * nominal bore (nominal size) * nominal (nominal) pressure Nominal bore (nominal size) is the nominal internal diameter of the pipeline connected to the valve in mm. The sizes of conditional passages must correspond to the numbers of the parametric series established by GOST 28338 - 89. Conditional (nominal) pressure is the highest excess working pressure at a working medium temperature of 20 ° C, at which a given service life of pipeline connections with certain dimensions, justified by strength calculations for the selected materials and their strength characteristics at temperatures up to 20 ° C, is ensured. In contrast to the nominal pressure, the working pressure is the highest overpressure at which the specified operating mode of the equipment is provided, that is, at the specified operating temperature. Basic terms Type is a classification unit that characterizes the interaction of the movable element of the gate with the flow of the working medium and determines the main design features. For example, gate valve, valve, valve, etc. View - a classification unit that characterizes the purpose. For example, shut - off, regulating, etc. Standard size - a structure regulated by the nominal bore and nominal pressure and having the designation of the group main design document.

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