Stainless steel valves are typically used in applications where the working medium is corrosive.
The corrosion resistance of any valve material is relatively limited and influenced by many factors. Proper manufacturing processes and heat treatments can ensure the material's corrosion resistance. However, in concentrated nitric acid media with a concentration >98%, this steel will not exhibit corrosion resistance regardless of the heat treatment process used.
Therefore, when selecting valve materials based on the properties of the working medium, the effects of medium concentration, temperature, and the material's heat treatment process on corrosion resistance must be studied simultaneously. Stainless steel valves have become essential products in various industries, but very few domestic valve manufacturers meet international standards. Therefore, customers must request production and factory certificates of conformity from suppliers before purchasing stainless steel valves to reduce the risk of buying substandard products. Currently, stainless steel valves and sanitary valves meeting international standards mainly originate from Japan, Germany, the United States, the United Kingdom, and Shanghai, a major city in China. Stainless steel valves are control components in pipeline fluid transport systems. They are used to change the cross-sectional area of the passage and the direction of media flow, and have functions such as guiding, stopping, regulating, throttling, checking, diverting, or overflowing and relieving pressure. Valves used for fluid control range from the simplest stop valves to various valves used in extremely complex automatic control systems, with a wide variety of types and specifications. Valves can be used to control water, steam, oil, gas, slurry, and various corrosive media. Valve control can employ various actuation methods, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic, electromagnetic-hydraulic, electro-hydraulic, pneumatic-hydraulic, spur gear, and bevel gear drives. They can operate according to predetermined requirements under the action of pressure, temperature, or other forms of sensor signals, or simply open or close without relying on sensor signals. Valves rely on drive or automatic mechanisms to make the opening and closing parts move up and down, slide, swing, or rotate, thereby changing the size of their flow channel area to achieve their control function.
