Which material of stop valve is more durable?

Stainless steel is undoubtedly one of the representatives of durability. Take 304 and 316 stainless steel as examples. 304 stainless steel has good corrosion resistance and can resist most oxidizing and medium-intensity chemical corrosion. It performs well in the pipeline control of liquid media in general commercial building water supply and drainage systems and ordinary chemical production. 316 stainless steel goes a step further and contains molybdenum, which makes it excellent in seawater corrosion resistance, high temperature resistance, and strong acid and alkali resistance. It is suitable for scenes with demanding requirements on valve materials such as marine engineering and pharmaceutical industries. Even if it is in contact with corrosive media for a long time, it can maintain good sealing and structural integrity.

Chromium-molybdenum steel also has excellent durability. This material exhibits excellent mechanical properties under high temperature and high pressure environments. It has high strength and hardness and can effectively resist thermal deformation and pressure shock. In the steam pipeline system of the power industry and the high temperature and high pressure process of petrochemical industry, chromium-molybdenum steel stop valves can operate stably to ensure the safe transportation and precise control of the medium in the pipeline.

In addition, there are some stop valves made of special materials, such as nickel-based alloys, which have extremely high corrosion resistance and high temperature resistance and are often used in special industrial fields with extreme corrosion conditions and ultra-high temperature environments. However, this type of material is expensive and has a relatively narrow application range.

In general, the choice of which material of the stop valve is more durable requires comprehensive consideration of the medium characteristics, temperature, pressure and other factors of the use scenario. Only materials that are suitable for the working conditions can maximize the durability advantages of the stop valve and ensure the long-term stable operation of the system.