The valve is a device that controls the flow, flow direction, pressure, temperature, etc. of the fluid medium in the fluid transportation system, and is a device that makes the medium (liquid, gas, powder) in the piping and equipment flow or stops and can control its flow.
Valves can be divided into the following categories according to their function:
Shut-off valve: used to completely shut off or open the flow of fluids.
Control valve: used to control the flow of fluids.
Check valve: used to prevent fluid backflow.
Diverter valves: Used to divert fluid to multiple pipes or equipment.
Relief valve: used to prevent the fluid pressure from being too high.
Valves can be divided into the following categories according to their structure:
Rotary Valve: The spool changes the flow channel section by rotating the motion.
Linear Stroke Valve: The spool changes the runner section by linear motion.
Quarter-turn valve: The spool changes the flow channel section by angular motion.
Valves can be divided into the following categories according to their material:
Metal valves: Valves made of metal materials.
Non-metallic valves: valves made of non-metallic materials, such as plastic valves, rubber valves, etc.
Valves are widely used in industry, construction, agriculture, transportation and other fields. In the industrial field, valves are used to control the flow of fluids in the production process, such as water, steam, oil, gas, etc. In the construction sector, valves are used to control water supply, drainage, heating, ventilation, and other systems within a building. In the agricultural field, valves are used to control the flow of fluids in agricultural production processes, such as irrigation, drainage, sprinkler irrigation, etc. In the field of transportation, valves are used to control the fluid system of transportation vehicles, such as automobiles, aircraft, ships, etc.
Valves are important components in the fluid delivery system, and their performance directly affects the safe, reliable and efficient operation of the fluid system. Therefore, the selection, installation, maintenance and other work of valves need to be carried out in strict accordance with relevant specifications.