- Overview
- Product Parameters
- Product Description
- Structure Features
- Our Advantages
- Production application
- Company Profile
Basic Info.
Product Description
Body type | AOC-3843 | AOC3844 |
Body size | 1/2''(40A)-6''(600A) | 1/2''(40A)-24''(600A) |
Body rating | ANSI 150-2500 | ANSI150-2500 |
Fluid temperature | -45~+200ºC | -45~+538ºC |
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 |

Expertly crafted with exceptional precision, each valve's ball and seat are fortified with state-of-the-art hard coatings, including chrome carbide or tungsten carbide. This advanced reinforcement guarantees extraordinary resistance against both erosion and abrasion, significantly enhancing the product's longevity and unwavering reliability.
Our exemplary SNT High Performance Soft Seated Ball Valves feature an innovative HVOF coating system revered in the industry. Every valve undergoes a meticulous mate-lapping process, employing proprietary techniques to ensure impeccable 100% sealing. The groundbreaking live loading feature promises zero emissions, while the ball's constant contact with the seat actively removes contaminants. This revolutionary self-cleaning mechanism prevents particle interference and damage, rendering these valves the ideal solution for challenging slurry and abrasive service applications.









Ingeniously designed with an anti-blowout feature, this valve effectively safeguards against stem ejection, thus preventing any potential damage and ensuring operational integrity.
The meticulously crafted seat ring, incorporating a wave spring and dual-scraper mechanism, delivers superior cleaning of the ball surface, maintaining impeccable sealing integrity and performance.
Our innovative dual-sealing mechanism ensures an exceptional leakage class by expertly isolating the flow from the spring, guaranteeing unparalleled protection and reliability.
The integrated design of draining and sweeping efficiently prevents valve jamming, ensuring reliability and longevity by keeping the valve impeccably clean.
Our valves rigorously comply with API 607 standards, offering robust fire-proof and anti-static functionalities for enhanced safety and performance in industrial applications.

Their Outstanding Features Include:
Innovative streamlined design allows for effortless disassembly, making maintenance a breeze.
Crafted with maintenance ease at the forefront, our ball valves feature a smart non-tight fit design, streamlining service, and significantly reducing downtime during routine maintenance checks.
Pioneering sealing technology ensures unparalleled security and peace of mind.
The advanced multi-layer sealing of the stem and body offers dual-layer protection with a synergy of O-ring, graphite, or PTFE, ensuring a superior seal under any condition.
This groundbreaking design satisfies the stringent TA-Luft/Shell SPE 77/312 standards, assuring high performance.
Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves are produced using sophisticated processing techniques like spray welding, spraying, and fusion welding. This ensures a hardness range of HRC58-73 and a binding force of 80-40MPa. With an exceptional on-off cycle lifespan surpassing 100,000 operations and a leakage class of ANSI VI, they guarantee longevity and reliability.
Modular Design for Enhanced Convenience
The modular inner sealing design is engineered for easy interchangeability between soft and metal seats, providing unmatched flexibility and dependability.
Varied Connection Types for User Convenience
Our valves come in a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all adhering to international standards, ensuring seamless integration and user-friendly operation.
Extensive Application Experience Guarantees Reliability
SNT Valves boast a sterling reputation, having been widely employed in petroleum, the chemical sector, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide exceptional solutions tailored for specific service conditions, ensuring reliability that leads the market.








SNT Machinery(Qingdao) Co., Ltd stands as an eminent leader in the realm of control valve manufacturing. We offer a flawless integration of production, design, sales, and service. Nestled in the scenic city of Qingdao, Shandong province, our expansive facility stretches over 42,000m². It is equipped with cutting-edge workshops and avant-garde production machinery. As a forward-thinking high-tech enterprise, we possess unique intellectual property rights and are empowered with global management and production acumen. Our dynamic team, comprising over 150 talented professionals, includes a remarkable 15% dedicated to research and development and 30% holding advanced degrees. We are unwavering in our commitment to innovation and excellence, crafting superior valves that find extensive applications in petrochemical, oil, and coal chemical sectors. Notably, our sales revenue reached an impressive nearly 100 billion in 2017.
SNT is honored to hold the esteemed TS special equipment manufacturing certificate and the prestigious ISO 9001 accreditation. Our reputation is further solidified with net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio is enriched with numerous national patents across diverse technologies. We have honed our capabilities in designing and manufacturing an extensive range of valves, adhering to rigorous standards such as ANSI, API, DIN, BS, and JIS. By seamlessly incorporating the finest features from globally renowned valves with our proprietary research and development, we present a broad spectrum of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our extraordinary product suite further embraces T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, and Self-operated Control Valves, among others. We offer an array of driving mechanisms such as manual, power-driven, pneumatic, and hydraulic operations. Main component materials include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications span from 1/2" to 120" in size, with working pressures from ANSI 150# to 2500#, and operational temperatures ranging from a chilling -196ºC to a scorching 1100ºC.
Harnessing advanced production technology alongside a formidable quality assurance system, SNT valves are indispensable in diverse industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our revered clientele includes illustrious entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and numerous others.
Dedicated to amplifying customer profitability, we pledge to establish an unparalleled quality standard and a distinguished brand identity. Our expansive quality assurance and after-sales service systems guarantee that SNT valves nurture fruitful partnerships with our entire client base.