Valve Introduction

The valve is a device used to control the direction, pressure and flow of the fluid in the fluid system. It is a device that allows the medium (liquid, gas and powder) in the piping and equipment to flow or stop and control the flow.

The valve is a control component in the pipeline fluid transmission system, used to change the channel section and the flow direction of the medium. It has the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief. The valves used for fluid control range from the simplest globe valve to various valves used in the extremely complex automatic control system, with various varieties and specifications. The nominal diameter of the valve ranges from the extremely small instrument valve to the industrial pipeline valve with the diameter of 10m. It can be used to control the flow of various fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluid. The working pressure of the valve can be from 0.0013MPa to 1000MPa, and the working temperature can be from c-270 ℃ to 1430 ℃.

The valve can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic-hydraulic, spur gear, bevel gear drive, etc; Under the action of pressure, temperature or other forms of sensing signals, it can act according to the predetermined requirements, or it can be simply opened or closed without relying on the sensing signals. The valve relies on the drive or automatic mechanism to make the opening and closing parts rise and fall, slide, swing or rotate, so as to change the size of the flow passage area to realize its control function.