4A National Standard Flange Ball Valve is a high-strength, quarter-turn flow control solution designed specifically to meet Chinese national standards (GB/T 12237). By utilizing a precision-engineered spherical ball, this valve allows for quick on/off control of various mediums. Because the flanged dimensions are standardized, it ensures perfect compatibility and easy installation within domestic industrial pipeline systems.
High-Performance 4A Duplex Material
This valve is manufactured from 4A (CD3MN) duplex stainless steel, which offers a superior combination of mechanical strength and corrosion resistance. Consequently, it is significantly more durable than standard stainless steel in chloride-rich environments. Furthermore, the robust construction of the 4A alloy makes it ideal for medium to high-pressure applications where long-term integrity is a priority.
Key Features and Engineering Advantages
In order to provide reliable performance in demanding infrastructure projects, our flanged ball valves include the following features:
- GB Standard Compliance: Every valve is manufactured to strict national specifications. Therefore, you can rely on standardized face-to-face dimensions and flange drilling for seamless maintenance.
- Full Bore Design: The internal passage matches the pipe diameter. Additionally, this unobstructed flow path ensures minimal pressure loss and prevents the accumulation of sediment.
- Leak-Tight Sealing: We offer both soft and metal-seated options to suit different temperatures. Specifically, these seats provide a reliable, leak-proof seal even under fluctuating pressure conditions.
- Simple Operation: The quarter-turn mechanism allows for rapid shut-off. Consequently, these valves are highly effective for industrial automation and emergency isolation tasks.
Versatile Industrial Applications
Whether you are managing petrochemical processing, water supply infrastructure, or HVAC systems, the 4A flanged ball valve delivers consistent results. Because of its compact design and high-alloy strength, it is a popular choice for both new projects and system upgrades. Ultimately, our national standard valves provide the safety and efficiency required for modern industrial pipelines.
Technical Summary
| Feature | Details |
| Material Grade | 4A / CD3MN Duplex Steel |
| Standard | GB/T 12237 (National Standard) |
| Connection Type | Flanged (Standardized Dimensions) |
| Bore Type | Full Bore (Low Pressure Drop) |