Ductile Iron Valve vs Gray Iron Valve
Release time:2025.05.16
Ductile Iron Valve vs Gray Iron Valve: Which One is Right for Your System?
When choosing the right valve for your application, material matters. Explore the key differences between Ductile Iron Valves and Gray Iron Valves to make an informed decision for performance, safety, and cost.
Ductile Iron Valves
- High tensile strength (≥ 420 MPa)
- Excellent impact resistance – ideal for high-pressure, fluctuating systems
- Superior durability – extended service life under demanding conditions
- Corrosion-resistant – suitable for municipal water, fire protection, and industrial pipelines
Recommended for: High-pressure water systems, dynamic flow conditions, and environments requiring enhanced reliability.
Gray Iron Valves
- Economical and easy to machine
- Good for low-pressure applications
- Great casting properties for standard-duty valves
Best used in: Low-pressure water, steam, and air systems with minimal vibration or shock.
🆚 Ductile Iron vs Gray Iron – Quick Overview
| Feature | Ductile Iron | Gray Iron |
|---|---|---|
| Tensile Strength | ≥ 420 MPa | 150–250 MPa |
| Impact Resistance | High | Low |
| Durability | Excellent | Moderate |
| Corrosion Resistance | Good | Low |
| Cost | Moderate | Low |
| Best Application | High-pressure/dynamic systems | Low-pressure/static systems |
Find the Right Cast Iron Valve for Your Project
At JUHAN, we offer both ductile and gray iron valves with uncompromising quality. Contact us for expert guidance and tailored solutions.
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