What is a common material used for valves in refrigeration applications for its corrosion resistance?

Stainless steel is commonly used for valves in refrigeration applications due to its excellent corrosion resistance. In refrigeration systems, components are often exposed to various chemicals, moisture, and extreme temperatures, all of which can lead to corrosion in less resistant materials. Stainless steel contains chromium, which forms a passive layer of chromium oxide on the surface, providing a barrier against corrosion. This characteristic makes it particularly valuable in environments where longevity and durability are critical, such as in refrigeration systems that operate continuously under varying conditions.

While materials like brass and copper are also used in some applications, they may not provide the same level of corrosion resistance, especially in certain ammonia or brine applications. Plastic can be suitable for certain low-pressure applications but lacks the mechanical strength and heat resistance needed for many refrigeration systems. Thus, the choice of stainless steel aligns well with the demands of refrigeration equipment, ensuring reliability and efficiency.