Medium type fittings, typically made from materials like ductile iron or cast iron, offer several advantages and differences compared to PVC or other plastic alternatives:

  1. Strength and Durability:
    • Medium type fittings made from ductile iron or cast iron are known for their high strength and durability, making them suitable for handling high-pressure applications and mechanical stress. They are less prone to deformation or damage compared to PVC or plastic alternatives, which may be more susceptible to impact or stress.
  2. Corrosion Resistance:
    • Medium type fittings made from ductile iron or cast iron are naturally resistant to corrosion, particularly when coated or lined with protective materials. This corrosion resistance ensures a longer service life and reduces the risk of leaks or failures over time, whereas PVC or plastic alternatives may degrade when exposed to certain chemicals or environmental conditions.
  3. Temperature Resistance:
    • Medium type fittings made from ductile iron or cast iron can withstand a wide range of temperatures, making them suitable for use in both hot and cold water systems, as well as in applications with fluctuating temperatures. PVC or plastic alternatives may have temperature limitations, particularly at higher temperatures, which could lead to deformation or failure.
  4. Installation Flexibility:
    • Medium type fittings made from ductile iron or cast iron offer flexibility in system design and installation. They can accommodate changes in direction, alignment, and elevation, allowing for easy modifications and adjustments without the need for specialized tools or techniques. PVC or plastic alternatives may also be flexible but may require additional fittings or adapters for complex configurations.
  5. Chemical Resistance:
    • Medium type fittings made from ductile iron or cast iron are generally resistant to a wide range of chemicals and fluids, making them suitable for use in various industrial applications. Medium type fittings PVC or plastic alternatives may offer chemical resistance but may be limited in the types of chemicals they can withstand.
  6. Fire Resistance:
    • Medium type fittings made from ductile iron or cast iron typically offer inherent fire resistance properties, making them suitable for use in fire protection systems and applications where fire safety is a concern. PVC or plastic alternatives may have lower fire resistance and may require additional fire protection measures.
  7. Cost:
    • Medium type fittings made from ductile iron or cast iron may have a higher upfront cost compared to PVC or plastic alternatives. However, they often offer superior durability and longevity, leading to lower lifecycle costs over time.

In summary, medium type fittings made from materials like ductile iron or cast iron offer advantages in terms of strength, durability, corrosion resistance, temperature resistance, installation flexibility, chemical resistance, fire resistance, and long-term cost-effectiveness compared to PVC or other plastic alternatives. The choice between the two depends on the specific requirements of the application, including pressure rating, temperature range, chemical compatibility, and lifecycle costs.