[Safety Measures] Spring Return Flanged Ball Valve
AF-51 / AF-51F / AF-53 / AF-53F（Anson Flow）
Peace of mind with reliable automatic closure. A dead man valve with a safety design compatible with "JIS flanges" that seamlessly fits into Japanese piping. API 607 certified!
This is a "spring return flange type ball valve" designed to prevent liquid leaks and spill accidents, ensuring the safety of the plant. It features a fail-safe design that automatically closes when released. 【Main Features and Benefits】 - Optimal specifications for the Japanese market: Standardly compatible with the mainstream "JIS flange (51 series)" used in domestic plants, allowing for extremely smooth replacement from existing piping and valves. - Safety that withstands harsh environments: The "AF-51F" and "AF-53F" have obtained API 607 fire resistance certification. They achieve reliable shut-off with a sealed spring and locking mechanism. - Assured quality and traceability: Consistent production at our own factory in Taiwan, which has obtained certifications such as ISO 9001. We provide MTRs compliant with EN10204 3.1 with each shipment. - Reduction in maintenance costs: Utilizes self-adjusting live load packing. This maintains a long lifespan and reduces replacement costs. - Approximately 1/3 reduction in operating torque: Our unique design significantly reduces the operational burden even for large diameter flange types.
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basic information
■Basic Specifications: ・Type: Spring return type flange ball valve. ・Diameter: 15A to 100A (1/2 inch to 4 inches). ・Operation method: Manual (automatic closing or automatic opening). ■Series Development (Flange Standards): ・AF-51 Series: Compatible with JIS 10K/20K, ANSI Class 150/300 ・AF-53 Series: Compatible with DIN PN16/PN40 * "AF-51F" and "AF-53F" are models certified with API 607 fire safety. ■Compatible Materials: ・Standard materials: SCS14A (SUS316 / CF8M), SCPH2 (WCB) ・Special alloys: Hastelloy, duplex, titanium, Monel, Alloy 20, etc.
Price information
It varies depending on specifications and quantity. Please feel free to request a quote.
Delivery Time
※Standard products can be delivered in a short time. For special materials and custom products, please contact us.
Applications/Examples of results
Our spring return valves are widely used in plant sites where human error can lead to serious accidents. [Main Applicable Industries and Uses] - Petrochemical plants: Ensuring safety for hazardous materials, toxic gases, and flammable fluid lines. - Piping construction and large equipment: Updating and new projects for various flange piping such as JIS, ANSI, and DIN. They are also ideal for replacing existing valves. - Energy and infrastructure: Oil and liquid spill prevention measures in LNG and tank yard applications.
Line up（2）
| Model number | overview |
|---|---|
| AF-51 / AF-51F (JIS/ANSI flange type ball valve) | An automatic closing ball valve that complies with the mainstream JIS and ANSI standards in Japan. The "AF-51F" has obtained API 607 fire certification. It allows for smooth replacement from existing piping and contributes to safety in petrochemical plants and other facilities. |
| AF-53 / AF-53F (DIN flange type ball valve) | A self-closing ball valve compliant with European DIN standards. The "AF-53F" has obtained API 607 fire certification. It demonstrates reliable fluid shut-off and high safety in equipment for overseas use and plant lines specified by DIN standards. |
catalog（1）
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Company information
Company Overview With 20 years of proven excellence, we are a premier Taiwanese manufacturer specializing in high-quality industrial valves and precision fluid control components. Our products have a strong track record in various industrial equipment globally, including supplies to major U.S. semiconductor manufacturers and compliance with rigorous European DNV maritime projects. From general applications to severe environments, we deliver reliability worldwide. Our Core Strengths: 1. Strict Quality Control & Global Certifications We are certified with ISO 9001, PED 2014/68/EU, ATEX, API 607 (Fire-safe), and BS 6364 (Cryogenic). To guarantee 100% traceability, we conduct strict Positive Material Identification (PMI) testing using handheld analyzers and provide EN 10204 3.1 Material Test Reports (MTR) for all shipments. 2. Special Alloys & Severe Environment Solutions We excel in processing NACE MR-01-75 compliant special materials, including Hastelloy, Monel, Alloy 20, and Duplex/Super Duplex stainless steels. We provide highly reliable solutions for demanding applications across petrochemical, semiconductor, and other severe industrial sectors. 3. One-Stop OEM/ODM Customization From R&D design and casting to 5-axis CNC machining, automated valve assembly, and final testing, our entire manufacturing process is completed in-house. We respond rapidly to custom designs tailored to your specific piping layouts and fluid conditions.
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