There are many types of power station valves, and when choosing them, the characteristics of the medium are one of the factors to consider.
If the medium is corrosive such as acid, alkali, chloride ions, etc., 316L stainless steel or nickel based alloy valve bodies are preferred, avoiding copper and cast iron materials. Copper sealing is prohibited for electrolyte systems;
If the medium is a high-temperature and high-pressure medium, the main steam pipeline (≤ 570 ℃/32MPa) should be equipped with a forged steel valve body and a cobalt based hard alloy sealed high-pressure globe valve or gate valve. If the temperature exceeds 570 ℃, chromium nickel alloy (such as WC6, 12Cr1MoV) is required;
If the medium is a medium containing particles/high viscosity, priority should be given to ball valves or plug valves (self-cleaning function to prevent blockage), to avoid gate valves (particles can easily damage the sealing surface), and PFA coated valves should be used to prevent crystallization blockage in molten salt systems (solar thermal power plants).
Of course, in addition to the characteristics of the medium, the selection of power station valves also needs to pay attention to operating parameters and functional requirements!