HC276 National Standard Flange Ball Valve，a high-performance, full-bore isolation valve constructed from Hastelloy C276, designed to provide leak-proof flow control for the most aggressive chemical media under National Standard (GB) and international specifications.
Description
The HC276 National Standard Flange Ball Valve is a premier fluid control solution engineered for environments where standard stainless steels and even duplex alloys fail. Constructed from Hastelloy C276 (UNS N10276)—a nickel-molybdenum-chromium superalloy—this valve is virtually immune to a wide range of corrosive agents, including wet chlorine, hypochlorite, and strong oxidizing acids. Its ball-and-seat design allows for a quick 90-degree shut-off, and the National Standard (GB) flange ensures seamless integration into domestic and international piping systems requiring high-integrity flanged connections.
Features
- Universal Corrosion Resistance: Exceptional performance in both oxidizing and reducing atmospheres, with specific resistance to pitting and stress corrosion cracking.
- Full Port Design: Provides maximum flow capacity and minimal pressure drop, ideal for high-viscosity or slurry-laden media.
- Blow-out Proof Stem: Internal entry stem design ensures the stem cannot be ejected under high pressure, enhancing operator safety.
- Fire-Safe & Anti-Static: Equipped with specialized sealing and grounding features to prevent hazardous discharge in volatile environments.
- Low Operating Torque: Precision-ground ball and high-quality PTFE or PEEK seats ensure smooth actuation even after long periods of inactivity.
Specifications
| Parameter | Details |
| Material Grade | Hastelloy C276 (ASTM A494 CW12MW / UNS N10276) |
| Design Standard | GB/T 12237, API 6D, ASME B16.34 |
| Pressure Rating | PN16, PN25, PN40, PN64 / Class 150 – 600 |
| Flange Standard | GB/T 9113, JB/T 79, ASME B16.5 |
| Seat Material | Reinforced PTFE (RPTFE), PEEK, or Metal-to-Metal |
| Temperature Range | -29°C to +200°C (Soft Seat) / Up to 450°C (Metal Seat) |
Applications
- Chemical & Petrochemical: Handling concentrated sulfuric, hydrochloric, and phosphoric acids.
- Pulp & Paper: Bleaching systems using chlorine dioxide and hypochlorite solutions.
- Waste Treatment: Processing aggressive industrial effluents and hazardous chemical waste.
- Flue Gas Desulfurization (FGD): Resisting scrubbers and heat exchangers in power plant emissions control.
- Pharmaceuticals: High-purity chemical synthesis where alloy integrity is critical to prevent batch contamination.
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