Valve is a essential components in fluid control system, it is usually used to open and close pipelines, control flow direction, regulate and control parameters of the conveying medium such as temperature, pressure, and flow rate, etc. There are many types of valves, different types of valves have specific application scenarios.
The type of Valves
Valves can be classified into Gate valve, Globe valve, Plug valve, Ball valve, and Check valve, and Safety valve, etc. The detail introduction is below.
For Gate valve: Gate valves control opening and closing of pipeline by lifting and lowing of the gate, suitable for fully open or fully closed conditions, but it is not suitable for regulating flow. Its sealing performance is good, but the switching time is long and frequent operation is inconvenient. Gate valve is mainly used for large diameter, high pressure pipelines that requires fully cut-off fluid.
For Globe valve: Globe valves control fluid flow by rotating the hand wheel to move the valve disc up and down, it is suitable for flow regulation and frequent operation. It has good sealing performance, but the fluid resistant in pipeline is higher, and its structure is relatively complex. It is usually used for boiler and steam systems, etc.
For Ball valve: Ball valves control flow by rotating a ball with holes. When the ball is rotated to 90 degree, which means that the pipeline is fully opening or fully closing. It has good sealing performance, easy operation. It is suitable for rapidly opening and closing of pipeline.
For Check valve: Check valve is used to prevent medium back flow, relying on the pressure of medium flow to automatically switch on and off. The structure of check valve is relatively easy, it is usually used in pipelines that requires back flow prevention, such as the outlet of water pump and drainage systems, etc.
For Safety valve: Safety valve automatically opens to release pressure when the pressure in pipeline systems exceeds the set value. And automatically closes after the pressure is restored. It is usually used to protect equipment and pipeline systems from over pressure damage. Safety valve is widely used in boilers, pressure vessels, and pipeline systems, etc.
In summary, different types of valves have different application environments. The valves should be selected according to practical application needs.
