Valve introduction

Valves are pipeline accessories used to open and close pipelines, control flow direction, adjust and control transmission medium Valves are accessories used in pipelines to open and close them, control flow direction, and adjust transmission medium parameters such as temperature, pressure, and flow. They can be divided into stop valves, check valves, regulating valves, and others based on their function.

They have several functions, including cut-off, flow adjustment, flow diversion, anti-backflow, pressure stabilization, and pressure relief through diversion or overflow. Valves are essential components in fluid conveying systems. Fluid control systems use a wide range of valves, from simple globe valves to those used in complex automatic control systems. These valves come in various specifications.
Valves can control the flow of fluids, including air, water, steam, corrosive media, mud, oil, liquid metal, and radioactive media. They are categorized by material standards, such as cast iron, cast steel, stainless steel (201, 304, 316, etc.), chrome molybdenum steel, chrome molybdenum vanadium steel, duplex steel, plastic, and non-customized valves.

Valve Introduction Broadcast
A valve is a device used to control the direction, pressure and flow of fluid in a fluid system.

A valve is a device that controls the flow of liquid, gas, or powder in pipelines and equipment by
changing the channel section and direction of the medium flow in the pipeline fluid conveying system.

It has the functions of diversion, cut-off, throttling, check, diversion or overflow, and pressure relief. Valves used for fluid control range from the simplest globe valves to various valves used in extremely complex automatic control systems. Industrial pipeline valves. It can control the flow of various fluids such as water, steam, oil, natural gas, mud, various corrosive media, liquid metal and radioactive fluid. The working pressure of the valve can be from 0.0013MPa to 1000MPa ultra-high pressure, and the working temperature can be from C-270℃ ultra-low temperature to 1430℃ high temperature.
The control of the valve can adopt a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic hydraulic, spur gear, bevel gear transmission, etc.; can be used in pressure, temperature, etc. Under the action of other forms of sensing signals, it acts according to predetermined requirements, or simply opens or closes without relying on sensing signals. Valves rely on driving or automatic mechanisms to lift, slide, swing or rotate the opening and closing parts. Movement, thereby changing the size of its channel area to realize its control function.

According to the main parameters
According to the nominal pressure:
(1) Vacuum valve: refers to a valve whose working pressure is lower than the standard atmospheric pressure.
(2) Low-pressure valve: refers to the valve with nominal pressure PN≤1.6Mpa.
(3) Medium pressure valve: refers to the valve with nominal pressure PN of 2.5Mpa, 4.0Mpa, 6.4Mpa.
(4) High-pressure valve: refers to a valve with a nominal pressure PN of 10.0Mpa to 80.0Mpa.
(5) Ultra-high pressure valve: refers to the valve with nominal pressure PN ≥ 100.0Mpa.
According to the working temperature:
(1) Ultra-low temperature valve: used for valves with medium working temperature t<-101°C. (2) Normal temperature valve: used for valves with medium working temperature -29°C425°C.
According to the driving mode:
According to the driving mode, it can be divided into automatic valve, power driven valve and manual valve.
By nominal diameter
(1) Small-diameter valves: valves with a nominal diameter of DN≤40mm.
(2) Medium diameter valve: a valve with a nominal diameter DN of 50 to 300mm.
(3) Large-diameter valves: valves with a nominal diameter of DN from 350 to 1200mm.
(4) Extra-large diameter valve: a valve with a nominal diameter DN≥1400mm