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The valve is a pipe accessory used to open and close the pipeline, control the flow direction, adjust and control the parameters of the conveying medium (temperature, pressure and flow). According to the function, it can be divided into gate valve, globe valve,check valve,ball valve,butterfly valve, control valve and so on.
The valve is the control part in the fluid conveying system, which has the functions of cut-off, regulating, diversion, preventing countercurrent, stabilizing pressure, shunting or overflow pressure relief. Valves are used for fluid control systems, ranging from the simplest cut-off valves to the most complex automatic control systems, have various varieties and specifications.
Valves can be used to control all kinds of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive medium. The valve is divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316), chrome molybdenum steel, chromium molybdenum vanadium steel valves, valve, dual phase steel valves, plastic valves, valves and other non-standard custom according to the material .