In the valve industry, after manufacturing, in order to better distinguish the types of various valves and the working conditions and environments they are suitable for, the valve body and other components of the valve often have several differences.
In the valve industry, after manufacturing, in order to better distinguish the types of various valves and the working conditions they are suitable for, the valve bodies and other components of the valves often have several differences. Looking at the current industry, the valve materials include carbon steel, low temperature Carbon steel, nickel steel, molybdenum steel, stainless steel, alloy steel, Monel, nickel alloy and other materials. Various manufacturing processes are used to compile models, including gate valve code Z, globe valve code J, throttle valve code L, etc. Generally, transmission mode codes are represented by Arabic numerals, such as electromagnetic ones written 0; turbine ones. 3; Choose 6 for pneumatic valves. Generally speaking, the structure of each valve is different.
Valve materials that use carbon steel are generally used in a temperature range of -30°C to +425°C and are non-corrosive applications, including water, oil and gas; for low-temperature carbon steel valves, the temperature can be as low as - WC6 The material used (1.25% chromium 0.5% molybdenum steel) can be used in non-corrosive applications, including water, oil and gas, and the temperature range is -30°C to +593°C; the valve oil grade made of chromium is WC9 and gas, the same Non-corrosive applications, including water, operating temperature range from -30°C to +593°C; products made of 5% chromium and 0.5% molybdenum alloy valves can be used in mildly corrosive or corrosive applications and non-corrosive applications, while 9% Valve products made of 1% chromium molybdenum alloy have a service temperature range of -30°C to +649°C, and are suitable for mildly corrosive or corrosive applications and non-corrosive applications; valves made of 12% chromium steel are also relatively corrosion-resistant ; Secondly, for stainless steel products, it is also an indispensable metal element in valve manufacturing. Stainless steel valves must specify a carbon content of 0.04% and above when the temperature is above +425°C, and can be used in corrosive or ultra-low or high temperature non-corrosive applications; while Monel materials The valve has good resistance to all common organic acids and salt water, can be welded, and also has high corrosion resistance to most alkaline solutions, with temperatures up to +400°C; secondly, the valve is made of Hastelloy nickel alloy valve material It has good resistance to sulfuric acid and phosphoric acid corrosion, and is especially suitable for use in various concentrations and temperatures of hydrofluoric acid in the processor, with temperatures up to +649°C.
As industrial manufacturing technology advances rapidly today, the materials of valves are also changing rapidly. In order to adapt to the needs of different working conditions, more valves made of alloy valves are slowly being developed and popularized.
