1. Price difference
Cast iron valve body
Lower cost : Cast iron valves are usually relatively cheap and are an economical choice for low-pressure and low-temperature scenarios, especially for conventional industrial fields.
Casting advantages : Cast iron material casting technology is mature, processing costs are low, suitable for mass production, and further reduce unit prices.
Carbon steel valve body
Higher cost : Carbon steel valves are generally more expensive than cast iron valves due to higher material costs and processing complexity (such as welding and heat treatment).
Performance premium : Carbon steel's high strength and high temperature and high pressure resistance make it irreplaceable in high-pressure scenarios, but it costs more for performance.
2. Trade-off between applicable scenarios and economic efficiency Low pressure/low temperature environment : Cast iron valve bodies are more cost-effective and can meet the needs of conventional water treatment, low-pressure steam, etc.
High pressure/high temperature environment : Although carbon steel valve bodies are expensive, they can withstand higher pressures (such as oil pipelines and chemical high-pressure systems), and long-term use can reduce the frequency of replacement.
3. Maintenance and lifespan
Cast iron maintenance cost: attention should be paid to rust and corrosion prevention, and long-term exposure to humid or acidic media may increase maintenance costs; Carbon steel durability: Carbon steel has better wear resistance and longer life in particle-containing media or frequent operation scenarios, which indirectly reduces the overall cost.