A valve is a control component in a fluid delivery system that has functions such as cut-off, regulation, diversion, reverse flow prevention, voltage regulation, shunt or overflow relief.
Valves for fluid control systems, ranging from the simplest shut-off valves to the very wide range of valves used in the most versatile automation systems, come in a wide range of variants and sizes. Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, slurries, oils, liquid metals and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201,304,316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valve materials .
According to the role and purpose (1) cut off categories: such as gate valve, globe valve, plug valve, ball valve, butterfly valve, needle valve, diaphragm valve. Truncated valve, also known as closed-circuit valve, globe valve, its role is to connect or cut off the medium in the pipeline. Check valve, also known as one-way valve or check valve, check valve is an automatic valve, its role is to prevent pipeline backflow of media to prevent the pump and drive motor reversal, and container media leakage. Water pump off the bottom valve also belong to the check valve category. Explosion-proof valve, accident valve, the role of safety valve is to prevent the pipeline or device in the media pressure exceeds the prescribed value, so as to achieve the purpose of security. Regulating valve, throttle and pressure reducing valve, its role is to adjust the medium pressure, flow and other parameters. (2) Vacuum categories: such as vacuum ball valve, vacuum flapper valve, vacuum inflation valve, pneumatic vacuum valve and so on. Its role is in the vacuum system, used to change the direction of the air flow, adjust the size of the gas flow, cut off or connected to the pipeline vacuum system components called vacuum valves. (3) special purpose categories: such as pig valve, vent valve, drain valve, exhaust valve, filter and so on. Exhaust valve piping system is an essential auxiliary components, widely used in boilers, air conditioners, oil and gas, water supply and drainage pipelines. Often installed in the commanding heights or elbows, etc., to exclude excess gas pipeline, pipelines to improve the efficiency and reduce energy consumption.
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