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Time:2024-07-30Overview
Valve is a control component in fluid transportation systems. It has functions such as cutting off, regulating, guiding flow, preventing backflow, stabilizing pressure, diverting flow or relieving pressure through overflow. Valves used in fluid control systems range from the simplest stop valves to the various valves used in extremely complex automatic control systems, with a great variety of types and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals and radioactive media. According to materials, valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chromium-molybdenum steel valves, chromium-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc.
Features
Parameter
GB/T1047-2005 Nominal diameters of pipeline components. GB/T1048-2005 Nominal pressures of pipeline components. GB/T11698-2008 Structural length of metal valves with flanged connections for ships. GB/T12220-1989 Marking of general purpose valves. GB/T12221-2005 Structural length of metal valves with flanged connections. GB/T12222-2005 Connections of multi-turn valve actuators. GB/T12223-2005 Connections of part-turn valve actuators. GB/T12224-2005 General requirements for steel valves. GB/T12247-1989 Classification of steam trap valves. GB/T12250-2005 Terminology, marking and structural length of steam trap valves. GB/T12712-1991 Technical management requirements for condensate recovery in steam heating systems and steam trap valves. GB/T12221-2005 Structural length of metal valves. JB/T74-1994 Technical conditions of pipe flanges. JB/T7928-1999 Supply requirements for general purpose valves. JB/T8530-1997 Type designation method for valve electric actuators.
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