② Valves: valves are the control parts in the fluid transmission system (including ball valves, butterfly valves, stop valves, gate valves, control valves, etc.).

Little known questions about white steel and stainless steel
First, both of them can be used as raw materials for pneumatic butterfly valves and metal compensators. Both of them can be welded with stainless steel electrodes. The white steel consumption process is usually electric furnace consumption. In recent years, the powder metallurgy method was used to consume high-speed steel, so that carbide particles are evenly distributed on the substrate, improving the service life. High speed steel is used, which has good toughness and high hardness, Cutting geometric parameters can grind stainless steel on demand, also known as stainless acid resistant steel. The corrosion resistance of stainless steel depends on the alloy element white steel contained in the steel, which is commonly referred to as 304 302, while stainless steel is 1Gr18Ni9Ti). Both (2Gr18Ni7Ti) and (0Gr18Ni9Ti) are rusty. White steel is yellow rust, which can be wiped off without affecting the normal use of performance, In humid environment, stainless steel rust is usually gray. This kind of selection should contain chromium and nickel, which will not rust in a short time if the composition is higher. The operating environment should be maintained as well as possible. Scratch welding can destroy both of them. Both of them are ugly and lead to rust prone chemical composition carbon C0.85 silicon silicon 0.30 manganese Mn0.30 chromium Cr4.00 tungsten W6.30 vanadium V1.80 molybdenum Mo5.00 refers to stainless steel which is resistant to air, steam Steel industrial white steel pipe corroded by weak corrosive medium such as water and chemical corrosive medium such as acid, alkali and salt is 304 stainless steel
The materials of stainless steel pneumatic butterfly valves and metal compensators consumed by our company depend on the customer's operating environment, pressure, length and caliber!