- 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 |

Crafted with unparalleled precision, the ball and seat of these valves are armored with state-of-the-art hard coatings like chrome carbide or tungsten carbide. This exceptional reinforcement ensures remarkable resistance to erosion and abrasion, significantly extending the valves' service life and boosting their dependability in rigorous environments.
Our SNT High Performance Soft Seated Ball Valves are equipped with an advanced HVOF coating system. Each valve undergoes exacting mate-lapping with proprietary methods to ensure a perfect 100% seal. The innovative live loading mechanism guarantees zero emissions, maintaining constant contact between the ball and seat to efficiently clear away contaminants. This sophisticated self-cleaning feature prevents particle interference and damage, making these valves an ideal choice for slurry and abrasive service applications, where reliability and performance are paramount.









Introducing a revolutionary anti-blowout design that adeptly prevents the stem from being blown out, thereby safeguarding against potential damage and enhancing safety.
The seat ring structure, featuring a wave spring and dual-scraper, is engineered to meticulously clean the ball surface while maintaining impeccable sealing efficiency.
Our dual-sealing technology ensures superior leakage protection by intelligently isolating the flow from the spring, elevating the leak-proof class.
Innovative draining and sweeping designs effectively prevent valve obstruction, ensuring uninterrupted performance through continuous cleaning capabilities.
Certified to meet API 607 standards, our product boasts exceptional fire-proof and anti-static features, upholding the highest safety and compliance standards.

Unmatched Features That Define Excellence:
Ingeniously streamlined design to ensure effortless disassembly, enhancing usability and efficiency.
Our ball valves are thoughtfully crafted with a focus on ease of maintenance. They boast a non-tight fit design that simplifies servicing, thereby significantly reducing downtime during routine maintenance cycles.
State-of-the-Art Sealing Technology for Ultimate Security
The multi-layer sealing of the stem and body provides dual-layered protection with a sophisticated blend of O-ring and graphite or PTFE, ensuring unparalleled sealing performance and reliability.
This pioneering design is meticulously engineered to meet the stringent TA-Luft/Shell SPE 77/312 standards.
Extended Durability for Unmatched Cost-Effectiveness
Our metal seated ball valves are subjected to cutting-edge processing techniques, including spray welding, spraying, and fusion welding. This process ensures a superior hardness range of HRC58-73 and a robust binding force of 80-40MPa, with an extraordinary on-off cycle lifespan surpassing 100,000 operations and achieving a leakage class of ANSI VI.
Modular Design for Increased Flexibility and Convenience
The adaptable modular inner sealing design enables seamless interchangeability between soft and metal seats, offering unmatched flexibility and reliability for varied applications.
Diverse Connection Types to Enhance User Convenience
Our valves are designed with a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all adhering to international standards. This ensures seamless integration and user-friendly operation.
Proven Reliability Through Extensive Application Experience
SNT Valves have garnered a distinguished reputation through extensive deployment in petroleum, chemical, light industries, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimal solutions that are precisely tailored to specific service conditions, guaranteeing industry-leading reliability and performance.








SNT Machinery (Qingdao) Co., Ltd. stands as a leading beacon of excellence in the manufacturing of superior control valves. Our company seamlessly integrates production, design, sales, and services within a sprawling 42,000m² facility nestled in the scenic beauty of Qingdao, Shandong province. Equipped with cutting-edge workshops and the latest production machinery, SNT Machinery is a high-tech enterprise distinguished by its exclusive intellectual property rights and global management acumen. Our dynamic team, comprising over 150 dedicated professionals, includes a remarkable 15% focused on research and development and 30% holding advanced degrees. With a steadfast commitment to innovation and quality, our valves have become essential components in the petrochemical, oil, and coal chemical industries, propelling our sales revenue to an impressive near-100 billion mark in 2017.
SNT Machinery proudly possesses the illustrious TS special equipment manufacturing certificate and ISO 9001 accreditation, marking our dedication to quality and compliance. We have garnered net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, while our extensive portfolio features numerous national patents across diverse technologies. Our expertise is reflected in our comprehensive array of valves, crafted to meet stringent ANSI, API, DIN, BS, and JIS standards. By infusing the best attributes of globally renowned valves with our unique R&D capabilities, we present a wide selection of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our expansive product lineup features an array of precision-engineered valves, such as 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. We offer a variety of operation modes, including manual, power-driven, pneumatic, and hydraulic mechanisms. Our main component materials are top-grade A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. We provide an extensive range of specifications, from 1/2" to 120" in size, with capabilities to withstand working pressures from ANSI 150# to 2500#, and operational temperatures ranging from a chilling -196ºC to a scorching 1100ºC.
Harnessing cutting-edge production technology and a formidable quality assurance system, SNT valves are indispensable across a variety of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious client list features elite names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and many more, each benefiting from our commitment to superior quality and innovation.
At SNT Machinery, we are driven by a relentless focus on maximizing customer profitability through the establishment of unmatched quality standards and the cultivation of a reputable brand identity. Our comprehensive quality assurance and after-sales service systems ensure that our valves are not just products, but pivotal components of prosperous and enduring partnerships with each of our esteemed clients.