Valves are control components that used in fluid delivery system. They are able to stop, adjust and guide the flow of fluids to prevent them from reverse flow and overflow. They can also regulate the pressure and separate the fluid. Thus, valves can be used in many industries with wide application scope.
Valves can be adopted to control the flow of fluids like air, water, varied corrosive media, slurry, oil, liquid metal, radioactive media and so on.
On base of different materials, valves can be sorted into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, plastic valves, non-standard customized valves, etc.
However to the most suitable valve while there are so many products with different prices, materials and functions?
First, you need to know clear about the functions of valves in facilities and devices as well as their working conditions, applicable media, working pressures and temperatures.
Second, you should grasp the nominal diameters of pipeline fittings that might be connected with valves such as flanges and their connection methods like threading and welding.
Third, you need to confirm the operating modes, including manual method, electric method, magnetic method, pneumatic or hydraulic method, and electro-hydraulic linkage.
Fourth, materials of valve shells and internals should be decided according to the delivered media, working pressure and temperatures. There are cast steel, carbon steel, stainless steel, stainless acid resistant steel, cooper alloy and other materials that you can choose from.
Fifth, you need to confirm the types and basic parameters of valves, containing structures of valves, sizes of connect flanges, the height valves reached when opening or closing and sizes and numbers of bolt holes and the external dimensions of entire valves .
Hope the above mentioned tips will be helpful for you to choose the most appropriate valve.
