Body type | AOC-3841 | AOC3842 |
Body size | 1/2''(15A)-6''(150A) | 1/2''(15A)-6''(150A) |
Body rating | ANSI 150-600 | ANSI150-600 |
Fluid temperature | -45~+200ºC | -45~+538ºC |
Nominal diameter | DN15-DN150 | DN15-DN150 |
Connections | RF/BW | |
Body materials | A216WC,A217WC6/9,A351CF8,A351CF8M etc | |
Ball Materials | A182 F304/F316/316L | |
Ball Treatment | Polishing/Hard Chromium Plating | Hard Chromium/Surfacing STL/Spary Ni60/Sparyed tungsten carbide |
Sealing Ring | PTFE/RTFE | Surfacing STL/Spary Ni55/Sparyed tungsten carbide |
Valve seat leakage | API 598 0 leakage | ANSI B16.014V API598 0 leakage |

Engineered for unrivaled durability, the ball and seat are enhanced with an advanced hard coating of chrome carbide or tungsten carbide. This state-of-the-art technology offers extraordinary resistance to erosion and abrasion, ensuring remarkably long-lasting performance.
Our SNT valves incorporate the state-of-the-art HVOF coating system. By employing our exclusive mate-lapping technique, we assure 100% sealing efficiency. Furthermore, live loading guarantees zero emissions, while the ball's constant contact with the seat effectively wipes away contaminants. This innovative self-cleaning mechanism protects the valve from damage and interference, making it exceedingly suitable for slurry and abrasive service applications.








Key Features:
Innovative, streamlined design allows for quick and effortless disassembly.
Our ball valves are engineered for ease of periodic maintenance with a non-tight fit design, significantly reducing maintenance time and effort.
Advanced sealing technologies ensure the highest levels of safety.
A sophisticated multi-layer combined sealing system for the stem and body offers dual protection through the integration of O-ring and graphite or PTFE seals.
This breakthrough design adheres to stringent TA-Luft/Shell SPE 77/312 standards, ensuring superior performance.
Enduring Durability and Cost-Effectiveness
For metal-sealed ball valves, we employ advanced techniques such as spray welding, spraying, and fusion welding for the ball and seat ring, achieving a hardness range of HRC58-73 and a binding force of 80-40MPa. This results in a robust valve capable of enduring over 100,000 on-off cycles with an excellent leakage class of ANSI VI.
Modular Design for Superior Convenience
The modular inner sealing system design allows seamless interchangeability between soft and metal seats, providing unmatched flexibility and ease of maintenance.
Versatile Connection Options for User-Friendly Experience
Our connection types include flanged (RF, FF, FM, G, RJ), screw-thread, and BW types, all adhering to international standards to ensure maximum user convenience.
Proven Reliability Across Various Applications
SNT Valves are trusted across diverse sectors such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. Our market reputation is built on providing practical solutions tailored to unique service conditions, ensuring dependable performance every time.
Our state-of-the-art packing combination is meticulously crafted to meet the stringent emission standards of 100 ppm. This innovative solution not only ensures superior compliance but also reduces stem friction by an impressive 20%, guaranteeing smooth operation and longevity.
2. The advanced seat ring structure, enhanced with a wave spring and dual-scraper mechanism, efficiently cleans the ball surface. This ensures optimal sealing integrity and maintains peak operational efficiency.
3. The dual-sealing mechanism offers unparalleled leakage protection by preventing flow contact with the spring. This innovative design ensures the highest leakage class, providing exceptional reliability and safety.
4. The sealing performance of our soft seat design is both exceptionally stable and reliable, delivering consistent and dependable results that you can trust.
5. Our expertly engineered draining and sweeping system is designed to effectively clean the valve, preventing any potential jamming issues and ensuring smooth operation.
6. Fully compliant with API 607 standards, our valve is equipped with fire-proof and anti-static capabilities. This guarantees maximum safety and reliability, making it a dependable choice for your most demanding applications.









SNT (Qingdao Xishuo Electric Machinery Co., Ltd.) stands as a leading authority in control valve manufacturing. Based in the strategic hub of Qingdao, Shandong province, our sprawling 42,000m² facility is outfitted with cutting-edge workshops and advanced production equipment. As a high-tech enterprise, we take pride in owning independent intellectual property rights and implementing cutting-edge international management and production techniques. Our team of over 150 dedicated professionals includes 15% R&D specialists and 30% with graduate degrees or higher. This commitment to excellence and innovation enables us to produce a diverse array of top-tier valves, widely utilized across the petrochemical, oil, and coal chemical industries. In an impressive milestone, our sales neared 100 billion in 2017.
SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We are honored to possess net qualification certificates from industry titans including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess has garnered us multiple national patents. We design and manufacture an extensive range of valves adhering to stringent ANSI, API, DIN, BS, and JIS standards. By merging the finest attributes of world-renowned valves with our innovative R&D, we offer a comprehensive portfolio featuring GLOBE Valves, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and beyond.
Our product lineup showcases V Ball Valves, High Wear-resistant Ball Valves, High-Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, available in manual, electric, pneumatic, and hydraulic driving forms. We use premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, accommodating working pressures from ANSI 150# to 2500# and operating temperatures from -196ºC to 1100ºC.
Utilizing our advanced production technology, precise management, and robust quality assurance systems, SNT valves earn trust across diverse industries including petrochemical, oil, steel, iron, paper manufacturing, and power stations. Our esteemed clientele features SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others.
At SNT, we are devoted to maximizing customer profitability by consistently delivering superior quality and establishing a reputable brand. Our unwavering commitment to comprehensive quality assurance and exemplary after-sales services ensures that SNT valves cultivate enduring partnerships with our clients, driving mutual success and long-term prosperity.