Common materials for check valves include cast iron, cast steel, stainless steel, brass, and plastic. Therefore, check valves can be categorized by material into types such as cast iron check valves, cast steel check valves, stainless steel check valves, brass check valves, and plastic check valves.
Metal Materials
Cast Iron Check Valves
Known for high strength and wear resistance, suitable for most industrial/commercial applications (medium/low pressure systems, cost-effective).
Stainless Steel Check Valves (e.g., 304, 316)
Offer corrosion resistance and high strength, ideal for chemical/pharmaceutical industries with corrosive media or high-pressure systems.
Brass Check Valves
Used in HVAC systems for hot/cold water (small diameter, threaded connections, rust-resistant).
Carbon Steel Check Valves
High strength but moderate corrosion resistance; common in oil & gas sectors.
Forged Steel Check Valves
Designed for high-temperature, high-pressure, and highly corrosive media (higher cost).
Non-Metal Materials
Plastic Check Valves (e.g., polypropylene)
Excellent chemical stability and corrosion resistance; lightweight and low-cost, suitable for chemical/industrial applications.
Rubber Check Valves
Used in flexible-demand scenarios (e.g., pump outlets) to prevent water hammer and reduce flow noise.
Special Materials
Ceramic/Graphene: Unique properties for niche applications (e.g., ceramic valves for wear/corrosion resistance in chemical industries).
